PHP - Get the Maximum Upload Size

file_upload_max_size.php

	function file_upload_max_size_int() {
		static $max_size = -1;
		if($max_size<0) {
			$post_max_size   = intval(ini_get('post_max_size'));
			$upload_max_size = intval(ini_get('upload_max_filesize'));
			$max_size        = min($post_max_size, $upload_max_size);
		}
		return $max_size;
	}

	function file_upload_max_size_str() {
		static $max_size = -1;
		if($max_size<0) {
			$post_max_size   = intval(ini_get('post_max_size'));
			$upload_max_size = intval(ini_get('upload_max_filesize'));
			$max_size        = parse_size(min($post_max_size, $upload_max_size));
		}
		return $max_size;
	}

	function parse_size($size) {
		$unit = preg_replace('/[^bkmgtpezy]/i', '', $size);
		$size = preg_replace('/[^0-9\.]/',     '',  $size);
		if($unit) {
			return round($size * pow(1024, stripos('bkmgtpezy', $unit[0])));
		} else {
			return round($size);
		}
	}