FILE¶

__FILE__ holds the current file name.

The file name includes it absolute path, e.g. /tmp/path/to/file.txt. It also uses the file actual case.

When used without a file, aka in command line, __FILE__ contains Command line code.

__FILE__ is often used with __LINE__, which holds the line number.

This constant is written in uppercase, by convention. It is case insensitive, and may be used with any combination of uppercase and lower case.

<?php

    function foo() {
        echo __FILE__; // /tmp/test.php
    }

foo();

?>

__FILE__¶