Session management in PHP is used to store and maintain user information across multiple web pages. Since HTTP is a stateless protocol, sessions help websites remember user data during browsing activities.<\/p>\n\n\n\n
Sessions are commonly used in login systems, shopping carts, dashboards, and secure web applications.<\/p>\n\n\n\n
By the end of this training, you will be able to:<\/p>\n\n\n\n
A session is a way to store user information on the server for temporary use across multiple pages.<\/p>\n\n\n\n
Each user gets a unique session ID that helps the server identify and track the user during website activity.<\/p>\n\n\n\n
Session management helps developers:<\/p>\n\n\n\n
PHP creates a unique session ID for every visitor. The session data is stored on the server, while the session ID is stored in the user\u2019s browser.<\/p>\n\n\n\n
When the user moves to another page, PHP uses the session ID to access stored data.<\/p>\n\n\n\n
The This function must appear before any HTML output.<\/p>\n\n\n\n Session variables store user information.<\/p>\n\n\n\n You can retrieve stored session data using the Use the Session values can be modified anytime.<\/p>\n\n\n\n Sessions should be destroyed during logout for security purposes.<\/p>\n\n\n\n Sessions are commonly used in authentication systems.<\/p>\n\n\n\n Session timeout improves security by automatically logging out inactive users.<\/p>\n\n\n\n Use Avoid storing passwords or highly sensitive information directly in sessions.<\/p>\n\n\n\n Secure websites should use HTTPS to protect session data during transmission.<\/p>\n\n\n\n Always destroy sessions after logout to prevent unauthorized access.<\/p>\n\n\n\n Many popular websites and applications use sessions for:<\/p>\n\n\n\n In your final presentation, explain:<\/p>\n\n\n\nsession_start()<\/code> function is used to begin a session.<\/p>\n\n\n\n<?php
session_start();
?><\/code><\/pre>\n\n\n\nCreating Session Variables<\/h2>\n\n\n\n
<?php
session_start();
$_SESSION[\"username\"] = \"Ali\";
$_SESSION[\"email\"] = \"ali@example.com\";
echo \"Session variables created\";
?><\/code><\/pre>\n\n\n\nAccessing Session Variables<\/h2>\n\n\n\n
$_SESSION<\/code> superglobal.<\/p>\n\n\n\n<?php
session_start();
echo $_SESSION[\"username\"];
echo $_SESSION[\"email\"];
?><\/code><\/pre>\n\n\n\nChecking Session Variables<\/h2>\n\n\n\n
isset()<\/code> function to verify whether a session exists.<\/p>\n\n\n\n<?php
session_start();
if(isset($_SESSION[\"username\"])) {
echo \"User is logged in\";
} else {
echo \"Session not found\";
}
?><\/code><\/pre>\n\n\n\nUpdating Session Variables<\/h2>\n\n\n\n
<?php
session_start();
$_SESSION[\"username\"] = \"Ahmed\";
echo \"Session updated\";
?><\/code><\/pre>\n\n\n\nDestroying a Session<\/h2>\n\n\n\n
<?php
session_start();
session_unset();
session_destroy();
echo \"Session destroyed\";
?><\/code><\/pre>\n\n\n\nLogin System Using Sessions<\/h2>\n\n\n\n
<?php
session_start();
$username = \"admin\";
$password = \"12345\";
if($username == \"admin\" && $password == \"12345\") {
$_SESSION[\"user\"] = $username;
echo \"Login successful\";
} else {
echo \"Invalid credentials\";
}
?><\/code><\/pre>\n\n\n\nLogout System Example<\/h2>\n\n\n\n
<?php
session_start();
session_destroy();
echo \"Logged out successfully\";
?><\/code><\/pre>\n\n\n\nSession Timeout Management<\/h2>\n\n\n\n
<?php
session_start();
$timeout = 300;
if(isset($_SESSION['last_activity'])) {
if(time() - $_SESSION['last_activity'] > $timeout) {
session_unset();
session_destroy();
}
}
$_SESSION['last_activity'] = time();
?><\/code><\/pre>\n\n\n\nBest Practices for Session Security<\/h2>\n\n\n\n
Regenerate Session ID<\/h3>\n\n\n\n
session_regenerate_id()<\/code> to prevent session hijacking.<\/p>\n\n\n\n<?php
session_start();
session_regenerate_id(true);
?><\/code><\/pre>\n\n\n\nStore Sensitive Data Securely<\/h3>\n\n\n\n
Use HTTPS<\/h3>\n\n\n\n
Destroy Sessions on Logout<\/h3>\n\n\n\n
Advantages of Session Management<\/h2>\n\n\n\n
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Common Uses of Sessions<\/h2>\n\n\n\n
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Real World Applications<\/h2>\n\n\n\n
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Final Presentation<\/h2>\n\n\n\n
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