How can session_start() impact the functioning of cookies in PHP and what precautions should be taken when using both?

When using session_start() in PHP, it can impact the functioning of cookies because PHP uses cookies to store the session ID. This can lead to conflicts if cookies are set before session_start() is called. To avoid this issue, it's important to call session_start() before any output is sent to the browser, including setting cookies. 

<?php
// Start the session before any output is sent
session_start();

// Set a cookie after starting the session
setcookie("example_cookie", "value", time() + 3600, "/");

// Rest of your PHP code here
?>

Keywords

session_start cookies PHP precautions functioning

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