What is the purpose of the PHP_SELF variable in PHP?

The PHP_SELF variable is used to get the filename of the currently executing script. It can be used for self-referencing forms, where the form submits data to the same script that generated the form. This can be useful for processing form data within the same script without needing to specify the script's filename explicitly. 

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

Keywords

PHP_SELF variable purpose security form submission

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