How can the PHP version affect the functionality of PHP_SELF in form processing?

The PHP version can affect the functionality of PHP_SELF in form processing due to changes in the way the variable is handled. To ensure compatibility across different PHP versions, it's recommended to use $_SERVER['PHP_SELF'] instead of relying on the PHP_SELF variable directly. 

<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="post">
  // form elements here
</form>

Keywords

PHP version PHP_SELF form processing functionality impact

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