How can the variable $_SERVER['PHP_SELF'] be utilized in PHP scripts?

The variable $_SERVER['PHP_SELF'] can be utilized in PHP scripts to retrieve the filename of the currently executing script. This can be useful for creating self-referencing forms, building dynamic URLs, or for security purposes to prevent form spoofing attacks. 

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

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$_SERVER PHP_SELF variable utilization PHP scripts

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