What are the benefits of using $_SERVER['PHP_SELF'] over $PHP_SELF in PHP form processing?

Using $_SERVER['PHP_SELF'] is preferred over $PHP_SELF in PHP form processing because it is a superglobal variable that provides a more secure way to access the current script filename. This helps prevent potential security vulnerabilities such as cross-site scripting attacks. By using $_SERVER['PHP_SELF'], you can ensure that the form action attribute points to the current script without exposing sensitive information. 

<form action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" method="post">
  <!-- Form fields go here -->
</form>

Keywords

$_SERVER['PHP_SELF'] $PHP_SELF form processing security vulnerability

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