title
7. PHP Tutorial - Log In Form - Log Out Script - Cookies and Sessions - User Profile

description
Code: https://www.adamkhoury.com/PHP/video/Log-In-Form-Log-Out-Script-Cookies-Sessions-User-Profile Learn to program the HTML - PHP - Ajax log in form, the log out script, start the user profile page for your social network web site software. We also create a module for checking user session, cookies and authentication against the MySQL database. In the next tutorial we will cover site maintenance automation using Cron Jobs.

detail
{'title': '7. PHP Tutorial - Log In Form - Log Out Script - Cookies and Sessions - User Profile', 'heatmap': [], 'summary': 'Tutorial series covers php login mechanics, user authentication, session management, and best practices such as password encryption, form data handling, and profile page initialization, emphasizing security measures and user experience enhancement.', 'chapters': [{'end': 301.377, 'segs': [{'end': 32.777, 'src': 'embed', 'start': 0.369, 'weight': 0, 'content': [{'end': 5.754, 'text': 'Hello and welcome to WebInnosec 2.0 Social Network Website Production Series Part 7.', 'start': 0.369, 'duration': 5.385}, {'end': 14.101, 'text': 'In this part we will cover the login mechanics, redirecting the user to a placeholder profile page if their login is successful.', 'start': 5.754, 'duration': 8.347}, {'end': 17.064, 'text': 'We will also cover the logout script in this video.', 'start': 14.342, 'duration': 2.722}, {'end': 24.871, 'text': 'And we will create a module for verifying the user in situations where you must double check their credentials before running some code.', 'start': 17.604, 'duration': 7.267}, {'end': 32.777, 'text': "Before we do those things, we're going to very quickly edit just a couple of lines of code from the last Web Intersect video number 6.", 'start': 25.171, 'duration': 7.606}], 'summary': 'Webinnosec 2.0 part 7 covers login, redirecting, logout, and user verification.', 'duration': 32.408, 'max_score': 0.369, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8369.jpg'}, {'end': 99.507, 'src': 'embed', 'start': 71.192, 'weight': 2, 'content': [{'end': 77.556, 'text': "Okay, here's the page, the URL that I want you to go to at the PHP official documentation manual.", 'start': 71.192, 'duration': 6.364}, {'end': 80.478, 'text': 'And you should just really listen to what they recommend.', 'start': 77.956, 'duration': 2.522}, {'end': 82.459, 'text': 'So it says safe password hashing.', 'start': 80.858, 'duration': 1.601}, {'end': 89.123, 'text': 'This section explains the reasons behind using hashing functions to secure passwords as well as how to do so effectively.', 'start': 82.579, 'duration': 6.544}, {'end': 90.303, 'text': 'So you have.', 'start': 89.783, 'duration': 0.52}, {'end': 93.805, 'text': 'why should I hash my passwords supplied by users of my application?', 'start': 90.303, 'duration': 3.502}, {'end': 99.507, 'text': 'Why are common hashing functions such as MD5 and SHA1 unsuitable for passwords?', 'start': 94.285, 'duration': 5.222}], 'summary': 'Php documentation recommends secure password hashing for user-supplied passwords. it explains reasons and unsuitability of md5 and sha1.', 'duration': 28.315, 'max_score': 71.192, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe871192.jpg'}, {'end': 273.703, 'src': 'embed', 'start': 244.89, 'weight': 3, 'content': [{'end': 249.993, 'text': "So while you're in production, if you just want to see all your systems working, go along with the tutorial series with me.", 'start': 244.89, 'duration': 5.103}, {'end': 251.534, 'text': 'You can use MD5 for now.', 'start': 250.033, 'duration': 1.501}, {'end': 258.337, 'text': 'And later on, when you become a super expert in PHP password encryption, then you go back and change it.', 'start': 252.014, 'duration': 6.323}, {'end': 260.278, 'text': 'Just make your system a little more secure.', 'start': 258.517, 'duration': 1.761}, {'end': 261.899, 'text': 'I gave you all of the information.', 'start': 260.558, 'duration': 1.341}, {'end': 262.959, 'text': 'You can go and read it yourself.', 'start': 261.939, 'duration': 1.02}, {'end': 264.66, 'text': 'And all you got to do is really Google.', 'start': 263.059, 'duration': 1.601}, {'end': 269.322, 'text': 'So make sure you go into signup.php and change that, like I just did.', 'start': 264.84, 'duration': 4.482}, {'end': 273.703, 'text': 'Now the next line I want you to change is within activation.php.', 'start': 269.802, 'duration': 3.901}], 'summary': 'Use md5 for now in production, later upgrade for better security.', 'duration': 28.813, 'max_score': 244.89, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8244890.jpg'}], 'start': 0.369, 'title': 'Webinnosec 2.0 part 7 and php password encryption', 'summary': 'Covers login mechanics, redirecting successful logins to a placeholder profile page, creating a module for verifying users, and briefly editing code from the previous video. it also discusses the importance of password encryption, recommends using crypt and hash over md5 and sha, and encourages individuals to read the official php documentation for safe password hashing, including the suggestion of using a basic md5 hash for the tutorial series.', 'chapters': [{'end': 32.777, 'start': 0.369, 'title': 'Webinnosec 2.0 part 7', 'summary': 'Covers login mechanics, redirecting successful logins to a placeholder profile page, creating a module for verifying users, and briefly editing code from the previous video.', 'duration': 32.408, 'highlights': ['Covering login mechanics and redirecting successful logins to a profile page.', 'Creating a module for verifying users before running code.', 'Briefly editing code from the previous video.', 'Part of the WebInnosec 2.0 Social Network Website Production Series.']}, {'end': 301.377, 'start': 32.777, 'title': 'Php password encryption', 'summary': 'Discusses the importance of password encryption, recommends using crypt and hash over md5 and sha, and encourages individuals to read the official php documentation for safe password hashing. it also suggests using a basic md5 hash for the tutorial series to continue and emphasizes the need for individuals to research and develop their own unique password encryption methods.', 'duration': 268.6, 'highlights': ['The chapter recommends using crypt and hash over MD5 and SHA for securing user passwords, based on the PHP official documentation manual. The PHP official documentation manual recommends using crypt and hash over MD5 and SHA for secure password hashing.', 'The chapter emphasizes the need for individuals to research and develop their own unique password encryption methods. The chapter encourages individuals to do their own research and come up with their own unique way of salting their passwords for secure storage.', 'The chapter suggests using a basic MD5 hash for the tutorial series to continue, with the option to enhance security later as individuals become more proficient in PHP password encryption. The chapter recommends using a basic MD5 hash for the tutorial series to continue, with the suggestion to enhance security later as individuals become more proficient in PHP password encryption.']}], 'duration': 301.008, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8369.jpg', 'highlights': ['Creating a module for verifying users before running code.', 'Covers login mechanics and redirecting successful logins to a profile page.', 'The chapter recommends using crypt and hash over MD5 and SHA for securing user passwords, based on the PHP official documentation manual.', 'The chapter suggests using a basic MD5 hash for the tutorial series to continue, with the option to enhance security later as individuals become more proficient in PHP password encryption.']}, {'end': 952.255, 'segs': [{'end': 342.887, 'src': 'embed', 'start': 301.577, 'weight': 0, 'content': [{'end': 308.321, 'text': "Okay, so if you change signup.php and activation.php, your system will work now with the login script that I'm about to show you.", 'start': 301.577, 'duration': 6.744}, {'end': 314.225, 'text': 'And then after you complexify your password storage mechanisms, you would also alter your login script.', 'start': 308.521, 'duration': 5.704}, {'end': 319.769, 'text': "And you'll want to replace activation.php and signup.php on your server right now.", 'start': 314.725, 'duration': 5.044}, {'end': 326.854, 'text': 'Now before we can continue, you have to go into your database, go into phpMyAdmin, and you want to empty the users table.', 'start': 320.109, 'duration': 6.745}, {'end': 333.059, 'text': 'Just click empty right there, truncate users, okay, and then empty the user options table as well.', 'start': 326.954, 'duration': 6.105}, {'end': 335.841, 'text': "So that way you're back to a clean slate, okay?", 'start': 333.799, 'duration': 2.042}, {'end': 342.887, 'text': 'And also, be very sure that you go right now into your folder system online, into the users folder,', 'start': 336.621, 'duration': 6.266}], 'summary': 'Update signup.php and activation.php, and clear users table in phpmyadmin.', 'duration': 41.31, 'max_score': 301.577, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8301577.jpg'}, {'end': 399.249, 'src': 'embed', 'start': 362.677, 'weight': 2, 'content': [{'end': 364.979, 'text': 'Now go ahead and make a few more dummy accounts.', 'start': 362.677, 'duration': 2.302}, {'end': 369.422, 'text': 'Make about three or four different dummy accounts using different email addresses.', 'start': 365.279, 'duration': 4.143}, {'end': 374.245, 'text': "This way, you'll have a few different users within your system to see how things work,", 'start': 369.922, 'duration': 4.323}, {'end': 377.287, 'text': 'especially when you go to create your friend system and things like that.', 'start': 374.245, 'duration': 3.042}, {'end': 380.729, 'text': "You'll want to have multiple dummy users in there to do some testing.", 'start': 377.327, 'duration': 3.402}, {'end': 382.39, 'text': 'So make several accounts right now.', 'start': 380.909, 'duration': 1.481}, {'end': 389.595, 'text': "All right, so when you click the link within your activation email, you'll see activation success and your account is now activated.", 'start': 382.41, 'duration': 7.185}, {'end': 390.596, 'text': 'Click here to log in.', 'start': 389.675, 'duration': 0.921}, {'end': 393.383, 'text': 'So you see now we have the login page up.', 'start': 391.221, 'duration': 2.162}, {'end': 395.805, 'text': "And this is what we're going to be explaining within this video.", 'start': 393.483, 'duration': 2.322}, {'end': 398.208, 'text': 'So this one is similar to the sign up page.', 'start': 396.366, 'duration': 1.842}, {'end': 399.249, 'text': 'It uses Ajax.', 'start': 398.248, 'duration': 1.001}], 'summary': 'Create three to four dummy accounts with different email addresses and activate them to test the system functionalities like friend system and login.', 'duration': 36.572, 'max_score': 362.677, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8362677.jpg'}, {'end': 643.114, 'src': 'embed', 'start': 614.994, 'weight': 4, 'content': [{'end': 620.317, 'text': 'And I think, see for the password, what do we have? See, max length.', 'start': 614.994, 'duration': 5.323}, {'end': 624, 'text': 'Change that to 100 or 200, whatever.', 'start': 621.578, 'duration': 2.422}, {'end': 630.865, 'text': "So you don't have to really restrict the length of their password since it's all going to be hashed anyway to a certain bit length.", 'start': 624.621, 'duration': 6.244}, {'end': 638.932, 'text': "And then you have the login button, which in the on click event, fires off the JavaScript function, login, and that's where your AJAX is.", 'start': 631.506, 'duration': 7.426}, {'end': 643.114, 'text': "I'm going to show you that login function in just a second that's sitting right here.", 'start': 639.732, 'duration': 3.382}], 'summary': "Adjust password max length to 100 or 200 to remove restrictions, and implement ajax in the login button's javascript function.", 'duration': 28.12, 'max_score': 614.994, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8614994.jpg'}, {'end': 710.864, 'src': 'embed', 'start': 684.529, 'weight': 5, 'content': [{'end': 688.391, 'text': 'All we do is we scoop up the variables from the form fields.', 'start': 684.529, 'duration': 3.862}, {'end': 694.715, 'text': "So you're scooping up the value of each form field and you're putting it into a local JavaScript variable.", 'start': 688.691, 'duration': 6.024}, {'end': 704.16, 'text': "Then you're saying if the email variable or the password variable is empty, then you want to put into the status field, fill out all of the form data.", 'start': 695.095, 'duration': 9.065}, {'end': 710.864, 'text': 'Else, if the email and the password do have values, then you can go ahead and process the form with AJAX.', 'start': 704.88, 'duration': 5.984}], 'summary': 'Extract form field values, validate for emptiness, and process form with ajax.', 'duration': 26.335, 'max_score': 684.529, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8684529.jpg'}, {'end': 964.074, 'src': 'embed', 'start': 937.752, 'weight': 6, 'content': [{'end': 942.933, 'text': 'So just leave this line in here for now even though we might not have the mechanism for security in place.', 'start': 937.752, 'duration': 5.181}, {'end': 946.254, 'text': "We'll put it in place later and I'll discuss it with you guys later.", 'start': 943.493, 'duration': 2.761}, {'end': 952.255, 'text': "But you want to keep updating the user's IP address in the database every time they log in.", 'start': 946.734, 'duration': 5.521}, {'end': 960.631, 'text': "Now the form data error handling, which we do in JavaScript, but we're going to also do it in PHP in case anybody bypasses our JavaScript.", 'start': 952.765, 'duration': 7.866}, {'end': 964.074, 'text': 'So we just check to see if the email and password actually have values.', 'start': 960.851, 'duration': 3.223}], 'summary': 'Implement ip address logging and form data error handling in javascript and php.', 'duration': 26.322, 'max_score': 937.752, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8937752.jpg'}], 'start': 301.577, 'title': 'Login system setup and design', 'summary': 'Covers setting up the login system, modifying signup.php and activation.php, creating dummy accounts for testing, explaining login and logout scripts, and providing details on the login form and its functionality, along with the process of creating a login form, including removing max lengths for password, implementing ajax for form processing, and handling php for form submission and security measures.', 'chapters': [{'end': 596.67, 'start': 301.577, 'title': 'Login system setup and testing', 'summary': 'Covers setting up the login system, including modifying signup.php and activation.php, emptying user tables, creating dummy accounts for testing, explaining the login and logout scripts, and providing details on the login form and its functionality.', 'duration': 295.093, 'highlights': ['The chapter covers setting up the login system, including modifying signup.php and activation.php, emptying user tables, creating dummy accounts for testing, explaining the login and logout scripts, and providing details on the login form and its functionality. modifying signup.php and activation.php, emptying user tables, creating dummy accounts for testing, explaining the login and logout scripts, details on the login form and its functionality', 'The importance of emptying the users table and user options table in the database is emphasized to ensure a clean slate for testing, along with removing any dummy or test account folders from the online folder system. emphasis on emptying user tables for clean testing, removing dummy or test account folders from the online system', 'Instructions on creating multiple dummy accounts using different email addresses to have several users within the system for testing purposes are provided. creating multiple dummy accounts for testing purposes', 'Explanation and demonstration of the login page functionality, including the use of Ajax, form data validation, and the redirect to the user profile page upon successful login. explanation and demonstration of login page functionality, use of Ajax, form data validation, redirect to user profile upon successful login', 'Details on the logic for verifying users in certain situations and the availability of profile editing buttons based on user credentials are explained. logic for verifying users in certain situations, availability of profile editing buttons based on user credentials', 'Demonstration of the logout script functionality, including logging out the user and redirecting to the home page, along with restrictions on accessing user profiles after logout. demonstration of logout script functionality, restrictions on accessing user profiles after logout', "Explanation of the login form's structure and functionality, including the use of AJAX processing, status element for error handling, and behavior on focus events for email and password fields. explanation of login form's structure and functionality, use of AJAX processing, status element for error handling, behavior on focus events for email and password fields"]}, {'end': 952.255, 'start': 596.97, 'title': 'Designing a login function', 'summary': 'Explains the process of creating a login form, including removing max lengths for password, implementing ajax for form processing, and handling php for form submission and security measures.', 'duration': 355.285, 'highlights': ['The process of creating a login form and implementing AJAX for form processing. The chapter explains the importance of removing max lengths for passwords, using AJAX for form processing, and handling PHP for form submission.', 'Using JavaScript to handle form validation and AJAX processing. The chapter details the process of using JavaScript to handle form validation and AJAX processing, ensuring that the form data is properly handled.', "Implementing security measures such as IP address tracking for user login. The chapter discusses the implementation of security measures, including tracking the user's IP address for login security and updating it in the database upon login."]}], 'duration': 650.678, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8301577.jpg', 'highlights': ['The chapter covers setting up the login system, modifying signup.php and activation.php, creating dummy accounts for testing, explaining the login and logout scripts, and providing details on the login form and its functionality.', 'The importance of emptying the users table and user options table in the database is emphasized to ensure a clean slate for testing, along with removing any dummy or test account folders from the online folder system.', 'Instructions on creating multiple dummy accounts using different email addresses to have several users within the system for testing purposes are provided.', 'Explanation and demonstration of the login page functionality, including the use of Ajax, form data validation, and the redirect to the user profile page upon successful login.', 'The process of creating a login form and implementing AJAX for form processing. The chapter explains the importance of removing max lengths for passwords, using AJAX for form processing, and handling PHP for form submission.', 'Using JavaScript to handle form validation and AJAX processing. The chapter details the process of using JavaScript to handle form validation and AJAX processing, ensuring that the form data is properly handled.', "Implementing security measures such as IP address tracking for user login. The chapter discusses the implementation of security measures, including tracking the user's IP address for login security and updating it in the database upon login."]}, {'end': 1265.278, 'segs': [{'end': 982.608, 'src': 'embed', 'start': 952.765, 'weight': 0, 'content': [{'end': 960.631, 'text': "Now the form data error handling, which we do in JavaScript, but we're going to also do it in PHP in case anybody bypasses our JavaScript.", 'start': 952.765, 'duration': 7.866}, {'end': 964.074, 'text': 'So we just check to see if the email and password actually have values.', 'start': 960.851, 'duration': 3.223}, {'end': 967.156, 'text': "If they don't, we just echo login failed and exit.", 'start': 964.114, 'duration': 3.042}, {'end': 971.78, 'text': 'Else if the values are there, you can go ahead and check for a match in the database.', 'start': 967.596, 'duration': 4.184}, {'end': 982.608, 'text': "So you set up your SQL syntax that reads select ID, username, and password from the users table where email equals this person's email address.", 'start': 972.18, 'duration': 10.428}], 'summary': 'Form data error handling in javascript and php for login validation.', 'duration': 29.843, 'max_score': 952.765, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8952765.jpg'}, {'end': 1044.751, 'src': 'embed', 'start': 1017.808, 'weight': 1, 'content': [{'end': 1022.451, 'text': "We know the first thing we selected was the ID, so that'll be zero.", 'start': 1017.808, 'duration': 4.643}, {'end': 1025.814, 'text': "The second thing was username, that'll be 1.", 'start': 1022.631, 'duration': 3.183}, {'end': 1029.176, 'text': "Third thing was password, and that'll be 2 in the array.", 'start': 1025.814, 'duration': 3.362}, {'end': 1031.618, 'text': "And that's how you can access those fields.", 'start': 1029.477, 'duration': 2.141}, {'end': 1042.729, 'text': 'And then you run an if condition that says if the password that the user is typing in, if that is not equal to their stored hash for their password,', 'start': 1032.039, 'duration': 10.69}, {'end': 1044.751, 'text': 'then you want to echo login failed.', 'start': 1042.729, 'duration': 2.022}], 'summary': 'Using array indexes, access and compare user password for login.', 'duration': 26.943, 'max_score': 1017.808, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81017808.jpg'}, {'end': 1111.096, 'src': 'embed', 'start': 1085.215, 'weight': 2, 'content': [{'end': 1091.08, 'text': "now, sessions are short-lived files only while the user's browser is open.", 'start': 1085.215, 'duration': 5.865}, {'end': 1099.149, 'text': "For instance, if we only made sessions here and we didn't set any cookies down here every time the user closed their browser,", 'start': 1091.421, 'duration': 7.728}, {'end': 1101.652, 'text': "came back the next day they'd have to log back in.", 'start': 1099.149, 'duration': 2.503}, {'end': 1106.017, 'text': 'But if you set cookies, your site automatically just remembers them.', 'start': 1102.353, 'duration': 3.664}, {'end': 1111.096, 'text': "And in my login form, I'm not going to put a box that says, remember me checkbox.", 'start': 1106.573, 'duration': 4.523}], 'summary': 'Sessions are short-lived files, cookies help remember users for seamless logins.', 'duration': 25.881, 'max_score': 1085.215, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81085215.jpg'}, {'end': 1142.318, 'src': 'embed', 'start': 1119.182, 'weight': 3, 'content': [{'end': 1130.73, 'text': 'That way the user has the option of telling your system to go ahead and create cookie files and then finally you update their IP address and their last login fields in the database.', 'start': 1119.182, 'duration': 11.548}, {'end': 1135.353, 'text': 'so you update users, set IP and last login field.', 'start': 1130.73, 'duration': 4.623}, {'end': 1142.318, 'text': 'for the last login field, you can just specify now in SQL syntax, which will give you the current time stamp,', 'start': 1135.353, 'duration': 6.965}], 'summary': 'Update user data, set ip and last login fields in database.', 'duration': 23.136, 'max_score': 1119.182, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81119182.jpg'}, {'end': 1194.399, 'src': 'embed', 'start': 1166.915, 'weight': 4, 'content': [{'end': 1175.901, 'text': 'you exit that script and then JavaScript Ajax takes back over right here and you window location the user to their profile.', 'start': 1166.915, 'duration': 8.986}, {'end': 1179.544, 'text': 'and that is all there is to login.php.', 'start': 1175.901, 'duration': 3.643}, {'end': 1182.166, 'text': "okay, now let's quickly discuss logout.php.", 'start': 1179.544, 'duration': 2.622}, {'end': 1185.112, 'text': 'first thing you do is session start.', 'start': 1182.87, 'duration': 2.242}, {'end': 1194.399, 'text': 'that way you can work with your session variables within the script and remember, session start has to go the first line, the very top of your file.', 'start': 1185.112, 'duration': 9.287}], 'summary': 'Javascript ajax handles user profile redirection in login.php. session start needed at the top of logout.php.', 'duration': 27.484, 'max_score': 1166.915, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81166915.jpg'}], 'start': 952.765, 'title': 'Php form data handling and user authentication', 'summary': 'Covers php form data error handling including checking empty email and password, setting up sql syntax, and accessing stored password hash. it also explains user login, session, and cookie creation, emphasizing the importance of remembering users for a seamless experience, and discussing the logout process.', 'chapters': [{'end': 1042.729, 'start': 952.765, 'title': 'Php form data error handling', 'summary': 'Explains the process of form data error handling in php, including checking for empty email and password values, setting up sql syntax to match the email in the database, and accessing and comparing the stored password hash.', 'duration': 89.964, 'highlights': ['The chapter explains the process of form data error handling in PHP, including checking for empty email and password values, setting up SQL syntax to match the email in the database, and accessing and comparing the stored password hash.', "The process involves checking if the email and password have values, echoing 'login failed' if not, and proceeding to check for a match in the database if the values are present.", "The SQL syntax is set up to read select ID, username, and password from the users table where the email matches the user's input, followed by running a MySQLI query to fetch the row from the database.", 'Local variables are used to store the fetched row variables, including the database ID, username, and password string, which are accessed as array indexes (0 for ID, 1 for username, and 2 for password).', "The chapter also emphasizes the importance of comparing the user's input password with their stored hash for password validation."]}, {'end': 1265.278, 'start': 1042.729, 'title': 'User authentication and session management', 'summary': 'Explains the process of user login, session and cookie file creation, and updating user data, emphasizing the importance of remembering users through cookies for a seamless experience, and discusses the logout process.', 'duration': 222.549, 'highlights': ['Explanation of session and cookie file creation, emphasizing the importance of cookies in remembering users for automatic login. Importance of cookies for automatic user login, distinction between short-lived session files and persistent cookie files.', 'Instruction on updating user data, including IP address and last login fields in the database, with a specific SQL syntax example. Updating user data, specifying current timestamp in SQL syntax, and limiting the update to a single row.', 'Importance of starting the script with session start and clearing session data and cookie files in the logout process. Necessity of starting the script with session start, clearing session data and expiring cookie files during logout.']}], 'duration': 312.513, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe8952765.jpg', 'highlights': ['The chapter covers PHP form data error handling, including checking for empty email and password values, setting up SQL syntax, and accessing and comparing the stored password hash.', "It explains the importance of comparing the user's input password with their stored hash for password validation.", 'Emphasizes the importance of cookies in remembering users for automatic login and the distinction between short-lived session files and persistent cookie files.', 'Provides instructions on updating user data in the database, including IP address and last login fields, with a specific SQL syntax example.', 'Highlights the necessity of starting the script with session start, clearing session data, and expiring cookie files during the logout process.']}, {'end': 1524.915, 'segs': [{'end': 1294.55, 'src': 'embed', 'start': 1265.638, 'weight': 0, 'content': [{'end': 1269.3, 'text': "So basically all we're doing is setting the cookie to a time in the past.", 'start': 1265.638, 'duration': 3.662}, {'end': 1270.301, 'text': 'Five days ago.', 'start': 1269.58, 'duration': 0.721}, {'end': 1271.942, 'text': 'That will expire their cookie.', 'start': 1270.601, 'duration': 1.341}, {'end': 1277.444, 'text': "Then you're going to destroy the session variables by running the session destroy function.", 'start': 1272.262, 'duration': 5.182}, {'end': 1282.966, 'text': 'Then the last thing, and this is optional, you can just double check to see if their sessions exist anymore.', 'start': 1277.784, 'duration': 5.182}, {'end': 1285.647, 'text': 'You say if is set, session username.', 'start': 1283.026, 'duration': 2.621}, {'end': 1294.55, 'text': 'Then you can header them to message.php with a message of error, logout failed, or you can just echo to the page here.', 'start': 1285.847, 'duration': 8.703}], 'summary': 'Setting cookie to expire 5 days ago, destroying session variables, and checking session existence.', 'duration': 28.912, 'max_score': 1265.638, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81265638.jpg'}, {'end': 1360.353, 'src': 'embed', 'start': 1335.066, 'weight': 1, 'content': [{'end': 1342.63, 'text': 'Now basically, the whole gist of this whole file is to have a module that you start session in.', 'start': 1335.066, 'duration': 7.564}, {'end': 1346.608, 'text': "the top line always of every script that you're going to use it in.", 'start': 1343.427, 'duration': 3.181}, {'end': 1353.391, 'text': 'So that means if you are going to include this file, check login status into any other scripts, it has to be the first line.', 'start': 1346.888, 'duration': 6.503}, {'end': 1360.353, 'text': 'You include it into the first line of any other scripts because you want to run session start first line in all of your scripts.', 'start': 1353.751, 'duration': 6.602}], 'summary': 'The module ensures session start as the first line in all scripts.', 'duration': 25.287, 'max_score': 1335.066, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81335066.jpg'}, {'end': 1430.278, 'src': 'embed', 'start': 1372.075, 'weight': 2, 'content': [{'end': 1375.718, 'text': "And they won't require session start because it's already in place here.", 'start': 1372.075, 'duration': 3.643}, {'end': 1377.079, 'text': 'So you be careful.', 'start': 1376.239, 'duration': 0.84}, {'end': 1383.986, 'text': "If you're going to include checkloginstatus.php into any pages, which we are, into user.php.", 'start': 1377.54, 'duration': 6.446}, {'end': 1389.591, 'text': "So if you're going to include this into user.php, you certainly don't want to have a connection to your database in that.", 'start': 1384.166, 'duration': 5.425}, {'end': 1400.157, 'text': "and you don't want to have session started at the top because you're already starting the session by including check login status into user.php in the very top.", 'start': 1390.151, 'duration': 10.006}, {'end': 1407.902, 'text': "Then we'll simply initialize some variables and down here in the bottom is where we are checking to see if they're logged in or not.", 'start': 1400.337, 'duration': 7.565}, {'end': 1416.051, 'text': "So, basically, what you want to do is check to see if their session variables are set, and if they are, you're going to run this code now.", 'start': 1408.182, 'duration': 7.869}, {'end': 1424.235, 'text': "maybe they're opening their browser and coming back a week later to your site and their session variables aren't set yet, but their cookies are set.", 'start': 1416.051, 'duration': 8.184}, {'end': 1427.297, 'text': 'then you want to run this code to see else.', 'start': 1424.235, 'duration': 3.062}, {'end': 1430.278, 'text': 'if their cookies are set, you run this code here.', 'start': 1427.297, 'duration': 2.981}], 'summary': 'Ensure checkloginstatus.php is included in user.php, avoiding redundant session start and database connection.', 'duration': 58.203, 'max_score': 1372.075, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81372075.jpg'}, {'end': 1500.661, 'src': 'embed', 'start': 1476.265, 'weight': 4, 'content': [{'end': 1483.669, 'text': "you don't ever want to query your database without sanitizing session or cookie data.", 'start': 1476.265, 'duration': 7.404}, {'end': 1491.017, 'text': "Since the end user can manipulate all of that data You want to make sure it's sanitized before it touches your database at all.", 'start': 1484.029, 'duration': 6.988}, {'end': 1500.661, 'text': "So that's why we're using preg replace here to make sure that the user's ID only has and only is allowed numbers in the value.", 'start': 1491.237, 'duration': 9.424}], 'summary': 'Sanitize session or cookie data before querying database to prevent manipulation by end users.', 'duration': 24.396, 'max_score': 1476.265, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81476265.jpg'}], 'start': 1265.638, 'title': 'Php session management and best practices', 'summary': 'Covers php logout process, expiring cookies, destroying session variables, and structuring checkloginstatus.php. it also discusses best practices for session handling, avoiding redundancy, initializing variables, and the importance of sanitizing session and cookie data for security.', 'chapters': [{'end': 1371.795, 'start': 1265.638, 'title': 'Php logout and session management', 'summary': 'Covers the process of logging out in php, including expiring cookies, destroying session variables, and structuring the checkloginstatus.php file, which ensures a session start at the beginning of each script execution and includes the database connection.', 'duration': 106.157, 'highlights': ['The process of logging out in PHP involves setting the cookie to a time in the past, expiring it, destroying session variables using the session destroy function, and checking if sessions exist before redirecting the user. expiring the cookie to five days ago', 'The checkloginstatus.php file is designed to be placed in the PHP includes folder and ensures that session start is the first line in all scripts where it is included, effectively handling the database connection as well. placing checkloginstatus.php in the PHP includes folder']}, {'end': 1407.902, 'start': 1372.075, 'title': 'Php session handling best practices', 'summary': 'Discusses best practices for including checkloginstatus.php into user.php, emphasizing the avoidance of redundant session starting and database connections, and the need to initialize variables for checking user login status.', 'duration': 35.827, 'highlights': ['Avoid redundant session start and database connections when including checkloginstatus.php into user.php', 'Emphasize initializing variables for checking user login status before checking if the user is logged in']}, {'end': 1524.915, 'start': 1408.182, 'title': 'Session & cookie data handling', 'summary': 'Explains the importance of sanitizing session and cookie data before querying the database, using preg_replace to allow only letters and numbers in user id, log user name, and log password for security measures.', 'duration': 116.733, 'highlights': ['The importance of sanitizing session and cookie data before querying the database is emphasized to prevent malicious manipulation, ensuring security and integrity of the data.', "The use of preg_replace to restrict the user's ID, log user name, and log password to only letters and numbers is explained as a security measure to prevent unauthorized characters and ensure data consistency.", 'The chapter discusses the scenarios in which the code for handling session and cookie data is executed based on whether session variables or cookies are set, ensuring efficient and accurate data processing.']}], 'duration': 259.277, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81265638.jpg', 'highlights': ['The process of logging out in PHP involves setting the cookie to a time in the past, expiring it, and destroying session variables.', 'The checkloginstatus.php file ensures that session start is the first line in all scripts where it is included, effectively handling the database connection as well.', 'Avoid redundant session start and database connections when including checkloginstatus.php into user.php.', 'Emphasize initializing variables for checking user login status before checking if the user is logged in.', 'The importance of sanitizing session and cookie data before querying the database is emphasized to prevent malicious manipulation, ensuring security and integrity of the data.', "The use of preg_replace to restrict the user's ID, log user name, and log password to only letters and numbers is explained as a security measure to prevent unauthorized characters and ensure data consistency.", 'The chapter discusses the scenarios in which the code for handling session and cookie data is executed based on whether session variables or cookies are set, ensuring efficient and accurate data processing.']}, {'end': 1702.325, 'segs': [{'end': 1568.79, 'src': 'embed', 'start': 1545.582, 'weight': 1, 'content': [{'end': 1553.568, 'text': "you're taking those session file data and you're putting it into local PHP variables called logID, logUsername, logPassword.", 'start': 1545.582, 'duration': 7.986}, {'end': 1556.27, 'text': 'Then, after you get those into local variables,', 'start': 1553.828, 'duration': 2.442}, {'end': 1563.167, 'text': "you're going to run the function called evalLoggedUser up here and you're going to feed it four variables.", 'start': 1556.27, 'duration': 6.897}, {'end': 1568.79, 'text': "The database connection variable, the person's ID, the person's username, and the person's password.", 'start': 1563.267, 'duration': 5.523}], 'summary': 'Session file data is stored in php variables and used to run evalloggeduser function with four variables.', 'duration': 23.208, 'max_score': 1545.582, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81545582.jpg'}, {'end': 1681.037, 'src': 'embed', 'start': 1639.201, 'weight': 0, 'content': [{'end': 1644.843, 'text': "So as long as you make sure your site doesn't allow cross-site scripting attacks, you're fine.", 'start': 1639.201, 'duration': 5.642}, {'end': 1645.783, 'text': 'And the system.', 'start': 1645.143, 'duration': 0.64}, {'end': 1648.104, 'text': "I'm going to give you all the way through the end of production.", 'start': 1645.783, 'duration': 2.321}, {'end': 1652.828, 'text': "There's nowhere in that system, in this system that I'm producing here,", 'start': 1648.664, 'duration': 4.164}, {'end': 1658.174, 'text': 'that someone can put in malicious JavaScript code and conduct cross-site scripting attacks.', 'start': 1652.828, 'duration': 5.346}, {'end': 1664.26, 'text': 'Furthermore, there will be nowhere in this system where somebody can perform MySQL injection.', 'start': 1658.714, 'duration': 5.546}, {'end': 1665.281, 'text': "So we're safe.", 'start': 1664.66, 'duration': 0.621}, {'end': 1671.187, 'text': 'So this eval logged user function runs really just as a double check mechanism,', 'start': 1665.721, 'duration': 5.466}, {'end': 1681.037, 'text': "just to make sure that nobody's playing around trying to impersonate somebody else by simply opening their cookie files and changing the values to some other user's name or something like that.", 'start': 1671.187, 'duration': 9.85}], 'summary': 'System is protected from xss and sql injection, ensuring safety and security.', 'duration': 41.836, 'max_score': 1639.201, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81639201.jpg'}], 'start': 1524.915, 'title': 'Php session data and user authentication', 'summary': 'Explains retrieving session data, setting php variables, and running evalloggeduser function for user authentication emphasizing security measures against cross-site scripting and mysql injection attacks.', 'chapters': [{'end': 1702.325, 'start': 1524.915, 'title': 'Php session data and user authentication', 'summary': 'Explains the process of retrieving session data, setting local php variables, and running evalloggeduser function to authenticate users. it also emphasizes the security measures to prevent cross-site scripting and mysql injection attacks.', 'duration': 177.41, 'highlights': ['The process of retrieving session data and setting local PHP variables is explained. The session data is retrieved if available and stored in local PHP variables called logID, logUsername, logPassword.', 'The function evalLoggedUser is described, which authenticates users by checking session data against the database and preventing impersonation. The evalLoggedUser function is used to authenticate users by cross-checking the session data with the database, preventing impersonation attempts.', 'Security measures against cross-site scripting and MySQL injection attacks are emphasized. The system is designed to prevent cross-site scripting and MySQL injection attacks, ensuring the security of user data and system integrity.']}], 'duration': 177.41, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81524915.jpg', 'highlights': ['The function evalLoggedUser authenticates users by cross-checking session data with the database, preventing impersonation.', 'The process of retrieving session data and setting local PHP variables is explained, ensuring secure user authentication.', 'Security measures against cross-site scripting and MySQL injection attacks are emphasized, ensuring system integrity.']}, {'end': 2330.701, 'segs': [{'end': 1726.881, 'src': 'embed', 'start': 1702.605, 'weight': 0, 'content': [{'end': 1710.506, 'text': 'That means if everything matched up and the user is authenticated, then you can return true to the line that called this function to run.', 'start': 1702.605, 'duration': 7.901}, {'end': 1714.567, 'text': 'And the line that called this function to run is right here, user OK.', 'start': 1711.126, 'duration': 3.441}, {'end': 1716.461, 'text': 'So, basically, user.', 'start': 1715.458, 'duration': 1.003}, {'end': 1723.339, 'text': 'OK, if everything works out and the user is authenticated, this is going to have a value of true.', 'start': 1716.461, 'duration': 6.878}, {'end': 1726.881, 'text': "otherwise, if they're not, it's going to remain with the value of false.", 'start': 1723.339, 'duration': 3.542}], 'summary': 'Function returns true if user is authenticated, else false.', 'duration': 24.276, 'max_score': 1702.605, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81702605.jpg'}, {'end': 1791.139, 'src': 'embed', 'start': 1761.937, 'weight': 2, 'content': [{'end': 1768.882, 'text': 'Then you make those local variables that we need, log ID, log username, log password, out of their session data.', 'start': 1761.937, 'duration': 6.945}, {'end': 1775.731, 'text': "So, for instance, if you wanted to put the user's name whoever's logged in, you want to show them their own name on a page.", 'start': 1769.488, 'duration': 6.243}, {'end': 1778.213, 'text': 'you can just echo this variable to a page.', 'start': 1775.731, 'duration': 2.482}, {'end': 1780.174, 'text': "And you don't have to echo all this.", 'start': 1778.753, 'duration': 1.421}, {'end': 1783.996, 'text': "So that's why I just put it into local PHP variables.", 'start': 1780.774, 'duration': 3.222}, {'end': 1791.139, 'text': 'Or if you want to ever evaluate their user ID or their username, you can just use these local variables.', 'start': 1784.336, 'duration': 6.803}], 'summary': 'Using local php variables for session data simplifies echoing and evaluation.', 'duration': 29.202, 'max_score': 1761.937, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81761937.jpg'}, {'end': 1856.471, 'src': 'embed', 'start': 1829.651, 'weight': 3, 'content': [{'end': 1838.719, 'text': "you want to update their last login time field because if they're coming back from two weeks later, they haven't visited your site in two weeks.", 'start': 1829.651, 'duration': 9.068}, {'end': 1841.621, 'text': 'you want to make sure that your system updates that last,', 'start': 1838.719, 'duration': 2.902}, {'end': 1847.867, 'text': 'so your other users know when was the last time he had come back or she had come back to visit the site.', 'start': 1841.621, 'duration': 6.246}, {'end': 1856.471, 'text': "because if you don't update that, it'll say their last login is whatever, 30 days ago, whatever, but they might have been at your site five days ago.", 'start': 1847.867, 'duration': 8.604}], 'summary': 'Update last login time to accurately reflect user activity and ensure up-to-date information for other users.', 'duration': 26.82, 'max_score': 1829.651, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81829651.jpg'}, {'end': 1890.023, 'src': 'embed', 'start': 1863.835, 'weight': 4, 'content': [{'end': 1873.199, 'text': "this file is mainly to give us a module that's going to start session and include a database connection into all of our pages,", 'start': 1863.835, 'duration': 9.364}, {'end': 1881.482, 'text': "because almost every single page on your social networking website you're going to have to evaluate the viewer that is viewing the page.", 'start': 1873.199, 'duration': 8.283}, {'end': 1890.023, 'text': 'You want to see if they are logged in or not, and you want to also know if they authenticate and match in the database with all their credentials.', 'start': 1881.542, 'duration': 8.481}], 'summary': 'Module to start sessions and include database connection for social networking website.', 'duration': 26.188, 'max_score': 1863.835, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81863835.jpg'}, {'end': 1929.28, 'src': 'embed', 'start': 1901.785, 'weight': 5, 'content': [{'end': 1906.586, 'text': 'You just say if user okay equals true, then I can do this secure action.', 'start': 1901.785, 'duration': 4.801}, {'end': 1910.929, 'text': "Okay, the last file that you're getting today is user.php.", 'start': 1906.926, 'duration': 4.003}, {'end': 1914.831, 'text': "And this file, we're going to be enhancing a little bit more later on.", 'start': 1911.189, 'duration': 3.642}, {'end': 1923.677, 'text': "But right now I just wanted to give it to you, so that way, when you your users log in or when you're testing, when you log in successfully,", 'start': 1915.151, 'duration': 8.526}, {'end': 1925.338, 'text': "you're navigated straight to this page.", 'start': 1923.677, 'duration': 1.661}, {'end': 1929.28, 'text': "So basically, down in the HTML, there's nothing special going on.", 'start': 1925.638, 'duration': 3.642}], 'summary': 'Enhancing user.php file for secure login navigation.', 'duration': 27.495, 'max_score': 1901.785, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81901785.jpg'}, {'end': 2019.424, 'src': 'embed', 'start': 1969.179, 'weight': 6, 'content': [{'end': 1976.366, 'text': 'so after that you can initialize any variables that might echo onto the page, because in some servers,', 'start': 1969.179, 'duration': 7.187}, {'end': 1983.851, 'text': "if you don't initialize the variables or they're not set at the top, if you try and echo them down in the HTML, you could get an error.", 'start': 1976.366, 'duration': 7.485}, {'end': 1987.995, 'text': "That's why it's handy to just initialize any variables that might echo to the page.", 'start': 1984.112, 'duration': 3.883}, {'end': 1990.937, 'text': "So we're just establishing them with default values.", 'start': 1988.375, 'duration': 2.562}, {'end': 1996.962, 'text': 'Then we make sure that the get username variable is set, and then we sanitize it.', 'start': 1991.177, 'duration': 5.785}, {'end': 2002.186, 'text': 'So if I go to my profile, user.phpu equals Adam.', 'start': 1997.302, 'duration': 4.884}, {'end': 2011.293, 'text': 'The user profile page knows what profile to display or what person to display from the database by this variable right here.', 'start': 2002.881, 'duration': 8.412}, {'end': 2014.958, 'text': "So that's the variable that you're scooping up to key value pair.", 'start': 2011.833, 'duration': 3.125}, {'end': 2017.241, 'text': 'The key is you and the value is Adam.', 'start': 2014.978, 'duration': 2.263}, {'end': 2019.424, 'text': 'or whatever the username might be.', 'start': 2018.064, 'duration': 1.36}], 'summary': 'Initializing variables prevents errors when echoing on the page.', 'duration': 50.245, 'max_score': 1969.179, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81969179.jpg'}, {'end': 2079.663, 'src': 'embed', 'start': 2056.746, 'weight': 8, 'content': [{'end': 2064.533, 'text': 'So your SQL syntax reads, select all from users where username equals you, variable, and activated equals one.', 'start': 2056.746, 'duration': 7.787}, {'end': 2071.692, 'text': "And I just added activated equals 1, just to make sure if this was 0 and they haven't activated yet.", 'start': 2064.963, 'duration': 6.729}, {'end': 2075.797, 'text': "you don't want this page to render and their profile to display to other people, do you?", 'start': 2071.692, 'duration': 4.105}, {'end': 2077.739, 'text': 'If you do, you could just remove that.', 'start': 2076.178, 'duration': 1.561}, {'end': 2079.663, 'text': "But if you don't, leave that in place.", 'start': 2078.221, 'duration': 1.442}], 'summary': 'Sql query filters users with activated status and prevents display if not activated.', 'duration': 22.917, 'max_score': 2056.746, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe82056746.jpg'}, {'end': 2148.921, 'src': 'embed', 'start': 2124.864, 'weight': 9, 'content': [{'end': 2130.868, 'text': "because if the viewer who's looking at the page is the actual account owner that owns that page,", 'start': 2124.864, 'duration': 6.004}, {'end': 2136.172, 'text': 'you can do things like give them buttons that nobody else would see and other logic along those lines.', 'start': 2130.868, 'duration': 5.304}, {'end': 2141.796, 'text': 'so we create a variable called is owner and we initialize it with a default value of no.', 'start': 2136.172, 'duration': 5.624}, {'end': 2148.921, 'text': 'then we can simply run a condition that says if the you get variable coming into the page is equal to log username,', 'start': 2141.796, 'duration': 7.125}], 'summary': "A variable 'is owner' is created with a default value of 'no' to provide specific features to the account owner.", 'duration': 24.057, 'max_score': 2124.864, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe82124864.jpg'}, {'end': 2302.173, 'src': 'embed', 'start': 2275.162, 'weight': 10, 'content': [{'end': 2283.106, 'text': "So what you're doing here is you're getting these things ready to be displayed or you can process them in your code whatever,", 'start': 2275.162, 'duration': 7.944}, {'end': 2285.367, 'text': "but at that point they're ready to use.", 'start': 2283.106, 'duration': 2.261}, {'end': 2288.928, 'text': "we can echo them to the page or do whatever we want with them, and that's it.", 'start': 2285.367, 'duration': 3.561}, {'end': 2297.131, 'text': "and, like I said, there's a lot more that's going to be happening on this page because they have to get options to adjust their profile.", 'start': 2288.928, 'duration': 8.203}, {'end': 2302.173, 'text': "it's going to have to be buttons, so when other members come and they view this person's profile,", 'start': 2297.131, 'duration': 5.042}], 'summary': 'Preparing items for display or processing in code for user interaction.', 'duration': 27.011, 'max_score': 2275.162, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe82275162.jpg'}, {'end': 2330.701, 'src': 'embed', 'start': 2310.814, 'weight': 1, 'content': [{'end': 2319.706, 'text': 'Okay, so in this video we covered the login, the logout, understanding sessions and cookies and how to establish them to keep the user alive,', 'start': 2310.814, 'duration': 8.892}, {'end': 2322.61, 'text': 'even if they close their browser, come back a week later,', 'start': 2319.706, 'duration': 2.904}, {'end': 2328.938, 'text': 'and establishing their profile page with the initial logic that it needs to display all kind of different users.', 'start': 2322.61, 'duration': 6.328}, {'end': 2330.701, 'text': "And I'll see you guys in part eight.", 'start': 2329.439, 'duration': 1.262}], 'summary': 'Covered login, logout, sessions, cookies, and user profile setup for maintaining user activity and displaying different users.', 'duration': 19.887, 'max_score': 2310.814, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe82310814.jpg'}], 'start': 1702.605, 'title': 'User authentication and profile page initialization', 'summary': 'Covers user authentication, session management, last login update, and profile page initialization, emphasizing security measures and user data management for improved user experience and website security.', 'chapters': [{'end': 1809.455, 'start': 1702.605, 'title': 'User authentication and session management', 'summary': 'Explains user authentication and session management, highlighting the process of validating user credentials, handling expired sessions, and creating local variables for user data.', 'duration': 106.85, 'highlights': ["The function returns true if the user is authenticated, represented by the 'user.OK' value, and false if not, indicating the success of user authentication.", 'The code segment handles cases where users return after session expiration, utilizing cookie file data to set sessions and creating local variables for user data, demonstrating efficient session management.', 'Local variables are created from session data to personalize user experience, enabling the display of user-specific information on web pages, emphasizing the practical application of session data.']}, {'end': 1969.179, 'start': 1809.935, 'title': 'User authentication and last login update', 'summary': 'Discusses the process of user authentication in a social networking website, emphasizing the importance of updating the last login time field for improved user tracking and authenticity verification.', 'duration': 159.244, 'highlights': ['The importance of updating the last login time field is emphasized to ensure accurate user activity tracking, enhancing the user experience and site authenticity. Updating the last login time field is crucial for accurate user tracking, ensuring that the system reflects the most recent user activity, thereby enhancing the user experience and site authenticity.', 'The purpose of the discussed file is to provide a module for starting sessions and including a database connection into all pages of a social networking website, facilitating user evaluation and authentication. The file aims to streamline the process of user evaluation and authentication across all pages of a social networking website by incorporating session initiation and database connection, ensuring efficient user authentication and evaluation.', 'The significance of the user.php file in displaying member information and facilitating user authentication is outlined, emphasizing the intention to enhance its functionality in the future. The user.php file plays a crucial role in displaying member information and facilitating user authentication, with future plans to enhance its functionality, providing a seamless user experience and verification process.']}, {'end': 2330.701, 'start': 1969.179, 'title': 'Profile page initialization', 'summary': 'Covers the initialization of variables for echoing onto the page, sanitization of user input, sql query execution, and user data retrieval, emphasizing the importance of security and personalization in profile page development.', 'duration': 361.522, 'highlights': ["The importance of initializing variables for echoing onto the page is emphasized to prevent errors, especially on certain servers. It's crucial to initialize variables that might echo onto the page to avoid errors, particularly on specific servers.", 'Sanitization of user input, particularly the username variable, is highlighted to ensure security and prevent unauthorized access. Emphasizing the need to sanitize user input, specifically the username variable, for security and prevention of unauthorized access.', 'Execution of SQL query to select user information is detailed, with a focus on ensuring user activation and existence in the database. The process of executing an SQL query to select user information is described, emphasizing the importance of user activation and existence in the database.', "Personalization of the profile page based on the viewer's account ownership is explained, including the identification of the account owner and the display of specific buttons. The explanation of personalizing the profile page based on the viewer's account ownership, involving the identification of the account owner and display of specific buttons.", 'Retrieval and processing of user data, including date formatting and gender identification, are discussed to prepare for display or further processing. The discussion on retrieving and processing user data, covering date formatting and gender identification to prepare for display or further processing.']}], 'duration': 628.096, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/gav4HmZ8xe8/pics/gav4HmZ8xe81702605.jpg', 'highlights': ["The function returns true if the user is authenticated, represented by the 'user.OK' value, and false if not, indicating the success of user authentication.", 'The code segment handles cases where users return after session expiration, utilizing cookie file data to set sessions and creating local variables for user data, demonstrating efficient session management.', 'Local variables are created from session data to personalize user experience, enabling the display of user-specific information on web pages, emphasizing the practical application of session data.', 'The importance of updating the last login time field is emphasized to ensure accurate user activity tracking, enhancing the user experience and site authenticity.', 'The purpose of the discussed file is to provide a module for starting sessions and including a database connection into all pages of a social networking website, facilitating user evaluation and authentication.', 'The significance of the user.php file in displaying member information and facilitating user authentication is outlined, emphasizing the intention to enhance its functionality in the future.', 'The importance of initializing variables for echoing onto the page is emphasized to prevent errors, especially on certain servers.', 'Sanitization of user input, particularly the username variable, is highlighted to ensure security and prevent unauthorized access.', 'Execution of SQL query to select user information is detailed, with a focus on ensuring user activation and existence in the database.', "Personalization of the profile page based on the viewer's account ownership is explained, including the identification of the account owner and the display of specific buttons.", 'Retrieval and processing of user data, including date formatting and gender identification, are discussed to prepare for display or further processing.']}], 'highlights': ['Emphasizes the importance of cookies in remembering users for automatic login and the distinction between short-lived session files and persistent cookie files.', 'The process of logging out in PHP involves setting the cookie to a time in the past, expiring it, and destroying session variables.', 'The chapter discusses the scenarios in which the code for handling session and cookie data is executed based on whether session variables or cookies are set, ensuring efficient and accurate data processing.', 'The function evalLoggedUser authenticates users by cross-checking session data with the database, preventing impersonation.', 'The process of retrieving session data and setting local PHP variables is explained, ensuring secure user authentication.', 'Security measures against cross-site scripting and MySQL injection attacks are emphasized, ensuring system integrity.', "The function returns true if the user is authenticated, represented by the 'user.OK' value, and false if not, indicating the success of user authentication.", 'The code segment handles cases where users return after session expiration, utilizing cookie file data to set sessions and creating local variables for user data, demonstrating efficient session management.', 'Local variables are created from session data to personalize user experience, enabling the display of user-specific information on web pages, emphasizing the practical application of session data.', 'The importance of updating the last login time field is emphasized to ensure accurate user activity tracking, enhancing the user experience and site authenticity.', 'The purpose of the discussed file is to provide a module for starting sessions and including a database connection into all pages of a social networking website, facilitating user evaluation and authentication.', 'The significance of the user.php file in displaying member information and facilitating user authentication is outlined, emphasizing the intention to enhance its functionality in the future.', 'The importance of initializing variables for echoing onto the page is emphasized to prevent errors, especially on certain servers.', 'Sanitization of user input, particularly the username variable, is highlighted to ensure security and prevent unauthorized access.', 'Execution of SQL query to select user information is detailed, with a focus on ensuring user activation and existence in the database.', "Personalization of the profile page based on the viewer's account ownership is explained, including the identification of the account owner and the display of specific buttons.", 'Retrieval and processing of user data, including date formatting and gender identification, are discussed to prepare for display or further processing.', 'The chapter covers setting up the login system, modifying signup.php and activation.php, creating dummy accounts for testing, explaining the login and logout scripts, and providing details on the login form and its functionality.', 'The process of creating a login form and implementing AJAX for form processing. The chapter explains the importance of removing max lengths for passwords, using AJAX for form processing, and handling PHP for form submission.', 'Using JavaScript to handle form validation and AJAX processing. The chapter details the process of using JavaScript to handle form validation and AJAX processing, ensuring that the form data is properly handled.', 'The chapter covers PHP form data error handling, including checking for empty email and password values, setting up SQL syntax, and accessing and comparing the stored password hash.', "It explains the importance of comparing the user's input password with their stored hash for password validation.", 'Provides instructions on updating user data in the database, including IP address and last login fields, with a specific SQL syntax example.', 'Highlights the necessity of starting the script with session start, clearing session data, and expiring cookie files during the logout process.', 'The checkloginstatus.php file ensures that session start is the first line in all scripts where it is included, effectively handling the database connection as well.', 'Avoid redundant session start and database connections when including checkloginstatus.php into user.php.', 'Emphasize initializing variables for checking user login status before checking if the user is logged in.', 'The importance of sanitizing session and cookie data before querying the database is emphasized to prevent malicious manipulation, ensuring security and integrity of the data.', "The use of preg_replace to restrict the user's ID, log user name, and log password to only letters and numbers is explained as a security measure to prevent unauthorized characters and ensure data consistency."]}