How can unique IDs be distributed to page visitors to differentiate content in PHP scripts?

To distribute unique IDs to page visitors in PHP scripts, you can generate a unique identifier using functions like uniqid() or md5() and store it in a session variable. This unique ID can then be used to differentiate content for each visitor. 

<?php
session_start();

if (!isset($_SESSION['visitor_id'])) {
    $_SESSION['visitor_id'] = uniqid();
}

echo "Visitor ID: " . $_SESSION['visitor_id'];
?>

Keywords

unique IDs page visitors differentiate content PHP scripts distribution

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