What are some potential security risks associated with using the $PHP_SELF variable in PHP?

Using the $PHP_SELF variable in PHP can pose a security risk as it can be manipulated by attackers to perform cross-site scripting (XSS) attacks. To mitigate this risk, it is recommended to sanitize the variable before using it in any output.

$script_name = htmlspecialchars($_SERVER['PHP_SELF'], ENT_QUOTES, 'UTF-8');