How do I display the script file name?

[email protected] ("Stephen Ford")
Newsgroups php.dev
Message-ID <[email protected]> 
How can I display the script file name? Presumably something like-:

<?php
echo $ScriptFileName;
?>

While I'm learning php and developing various Web page versions, I want to
be sure the that the display is from the appropriate script.

Regards
Stephen Ford, Surrey, UK
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