getID3::CharConvert

			);
		}

		return $format_info;
	}

	/**
	 * @param string $filedata
	 * @param string $filename
	 *
	 * @return mixed|false
	 */
	public function GetFileFormat(&$filedata, $filename='') {
		// this function will determine the format of a file based on usually
		// the first 2-4 bytes of the file (8 bytes for PNG, 16 bytes for JPG,
		// and in the case of ISO CD image, 6 bytes offset 32kb from the start
		// of the file).

		// Identify file format - loop through $format_info and detect with reg expr
		foreach ($this->GetFileFormatArray() as $format_name => $info) {
			// The /s switch on preg_match() forces preg_match() NOT to treat