What are the potential pitfalls of using setcookie() in PHP, especially in relation to output buffering?
When using setcookie() in PHP, especially in relation to output buffering, a potential pitfall is that headers must be sent before any output is generated. If output buffering is enabled, headers are not sent immediately, which can cause issues when trying to set cookies. To solve this, you can either disable output buffering or manually send the headers before setting the cookie.
<?php
ob_start(); // Start output buffering
// Your PHP code here
ob_end_flush(); // Send output buffer
// Now you can safely use setcookie()
setcookie("cookie_name", "cookie_value", time() + 3600, "/");
?>