PHP script: Display active session count on server

PHP Cookies and Sessions: Exercise-12 with Solution

Write a PHP script to display the number of active sessions on the server.

Sample Solution:

PHP Code :

<?php
// Set the session save path
session_save_path('i:/custom/');

// Get the session save path directory
$sessionSavePath = session_save_path();

// Get all session files in the save path directory
$sessionFiles = glob($sessionSavePath . '/*');

// Initialize the session counter
$activeSessions = 0;

// Iterate through the session files
foreach ($sessionFiles as $sessionFile) {
    // Check if the session file is valid
    if (is_file($sessionFile) && filectime($sessionFile) + ini_get('session.gc_maxlifetime') > time()) {
        $activeSessions++;
    }
}                        
echo "Number of active sessions: " . $activeSessions;
?>

Sample Output:

Number of active sessions: 0

Explanation:

In the above exercise -

• We set the session save path using session_save_path('i:/custom/').
• Retrieve the session save path using session_save_path() and store it in the variable $sessionSavePath.
• Use glob() to get an array of all session files in the session save path directory.
• Initialize the session counter variable $activeSessions to 0.
• Iterate through the session files using a foreach loop.
• For each session file, we check if it is a valid file and if its creation time plus the maximum session lifetime (configured by session.gc_maxlifetime) is greater than the current time. If both conditions are true, we increment the $activeSessions counter.
• Finally, display the number of active sessions using echo.

Flowchart:

PHP Code Editor:

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