basename()
Basename is a PHP native function that returns the name of a file, extracted from a full path.
When passed a second parameter, basename uses it as the file extension and removes it. The file extension is then a string, and includes the dot. It is not possible to provide multiple file extensions.
basename() is locale aware, so it has to match the locale of the filesystem to find and remove the extension in multiple bytes encoding.
<?php
$path = '/var/www/index.php';
print basename($path); // index.php
print basename($path, '.php'); // index
print basename($path, '.PHP'); // index.php
print basename($path, 'php'); // index.
?>