How can session_id be used to identify different PCs in PHP?

To identify different PCs in PHP using session_id, you can store the session_id in a cookie on the client's browser. This way, each PC will have a unique session_id associated with it, allowing you to differentiate between them. 

<?php
session_start();

if(!isset($_COOKIE['pc_id'])){
    $pc_id = uniqid();
    setcookie('pc_id', $pc_id, time() + (86400 * 30), "/"); // set cookie for 30 days
} else {
    $pc_id = $_COOKIE['pc_id'];
}

echo "PC ID: " . $pc_id;
?>

Keywords

session_id identify different PCs PHP session management

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