Function to get the max file upload allowed by php.ini configuration

max_file_upload.php

<?php
    function getMaxFileUpload() {
        $max_upload = (int)(ini_get('upload_max_filesize'));
        $max_post = (int)(ini_get('post_max_size'));
        $memory_limit = (int)(ini_get('memory_limit'));
        $upload_mb = min($max_upload, $max_post, $memory_limit);
    }