PHP Check if File Exists

This PHP script checks if a file exists.

<?php

/**
* Check If File Exists
*
* This script simply checks if a file exists
* and some text stating whether it does or not. 
* 
* @author		PHP Simple
* @website		http://phpsimple.com
* @date			August 2021
*/

if (file_exists($filename)) {
    echo "File exists.";
} else {
    echo "File does not exist.";
}

?>