How does the order of PHP code execution impact the availability and functionality of sessions/cookies in a script?

The order of PHP code execution can impact the availability and functionality of sessions/cookies in a script because sessions must be started before any output is sent to the browser. If output is sent before starting a session, cookies cannot be set properly, leading to session-related issues. To solve this, always start the session at the beginning of the script before any output or headers are sent. 

<?php
// Start the session at the beginning of the script
session_start();

// Your PHP code here
?>

Keywords

PHP code execution sessions cookies availability functionality

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