What is the significance of the order in which output is sent in PHP when setting cookies?

The significance of the order in which output is sent in PHP when setting cookies is that cookies must be set before any output is sent to the browser. This is because once any output is sent, headers are already sent, and cookies cannot be set after that. To solve this issue, make sure to set cookies at the beginning of the PHP script before any HTML or text output. 

<?php
// Set cookies before any output
setcookie('cookie_name', 'cookie_value', time() + 3600, '/');
?>
<!DOCTYPE html>
<html>
<head>
    <title>Setting Cookies</title>
</head>
<body>
    <h1>Cookies set successfully!</h1>
</body>
</html>

Keywords

PHP output buffering cookies headers order of operations

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