Why is it recommended to use POST, GET, and $_SERVER['PHP_SELF'] instead of $PHP_SELF in PHP scripts?

Using POST, GET, and $_SERVER['PHP_SELF'] instead of $PHP_SELF in PHP scripts is recommended to prevent security vulnerabilities such as cross-site scripting (XSS) attacks. By using these predefined variables and superglobals, you ensure that user input is properly sanitized before being used in your script. This helps protect your application from potential malicious attacks. 

<form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="POST">
  <!-- form elements here -->
</form>

Keywords

POST GET $_SERVER['PHP_SELF'] $PHP_SELF PHP scripts

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