What potential issues can arise when using setcookie() in PHP scripts?

One potential issue when using setcookie() in PHP scripts is that it must be called before any output is sent to the browser. If setcookie() is called after any output, it will not set the cookie correctly. To solve this, ensure that setcookie() is called before any HTML, whitespace, or echo/print statements in your script. 

<?php
// Correct way to set a cookie
setcookie("cookie_name", "cookie_value", time() + 3600, "/");
?>

Keywords

setcookie PHP scripts security vulnerabilities cookie manipulation session hijacking

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