How does PHP handle browser window closure or page navigation events?

When a browser window is closed or a user navigates away from a page, PHP cannot directly detect these events as it is a server-side language. However, you can use JavaScript to send an AJAX request to the server when these events occur, allowing PHP to perform any necessary actions. 

// JavaScript code to send AJAX request when window is closed or page is navigated away from
<script>
window.onbeforeunload = function(){
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.open("GET", "handle_events.php", true);
    xmlhttp.send();
};
</script>

// PHP code in handle_events.php to handle the event
<?php
// Perform actions here when window is closed or page is navigated away from
?>

Keywords

PHP browser window closure page navigation events event handling session management

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