PHP how to go one level up on dirname(__FILE__)

You can use dirname(dirname(__FILE__)) to go two levels up in the directory structure when using __FILE__ (which returns the current file's path). For example:

Example of using nested dirname() to go two levels up in PHP

<?php

$current_file_path = __FILE__;
$one_level_up = dirname($current_file_path);
$two_levels_up = dirname($one_level_up);

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You can also use the .. notation, or the modern dirname() depth parameter available in PHP 7+:

Example of using dirname() with a depth parameter (PHP 7+)

$two_levels_up = dirname(__FILE__, 2);