PHP Upload Size

max_upload.php

<?php 

function getMaxUploadMB() {
    $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);

    return $upload_mb;
}