getid3_lib

22class getid3_lib23{24	/**25	 * @param string      $string26	 * @param bool        $hex27	 * @param bool        $spaces28	 * @param string|bool $htmlencoding29	 *30	 * @return string31	 */32	public static function PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8') {33		$returnstring = '';34		for ($i = 0; $i < strlen($string); $i++) {35			if ($hex) {36				$returnstring .= str_pad(dechex(ord($string[$i])), 2, '0', STR_PAD_LEFT);37			} else {38				$returnstring .= ' '.(preg_match("#[\x20-\x7E]#", $string[$i]) ? $string[$i] : '¤');39			}40			if ($spaces) {41				$returnstring .= ' ';42			}43		}44		if (!empty($htmlencoding)) {45			if ($htmlencoding === true) {46				$htmlencoding = 'UTF-8'; // prior to getID3 v1.9.0 the function's 4th parameter was boolean47			}48			$returnstring = htmlentities($returnstring, ENT_QUOTES, $htmlencoding);49		}50		return $returnstring;51	}52 53	/**54	 * Truncates a floating-point number at the decimal point.55	 *56	 * @param float $floatnumber57	 *58	 * @return float|int returns int (if possible, otherwise float)59	 */60	public static function trunc($floatnumber) {61		if ($floatnumber >= 1) {62			$truncatednumber = floor($floatnumber);63		} elseif ($floatnumber <= -1) {64			$truncatednumber = ceil($floatnumber);65		} else {66			$truncatednumber = 0;67		}68		if (self::intValueSupported($truncatednumber)) {69			$truncatednumber = (int) $truncatednumber;70		}71		return $truncatednumber;72	}73 74	/**75	 * @param int|null $variable76	 * @param-out int  $variable77     * @param int      $increment78	 *79	 * @return bool80	 */81	public static function safe_inc(&$variable, $increment=1) {82		if (isset($variable)) {83			$variable += $increment;84		} else {85			$variable = $increment;86		}87		return true;88	}89 90	/**91	 * @param int|float $floatnum92	 *93	 * @return int|float94	 */95	public static function CastAsInt($floatnum) {96		// convert to float if not already97		$floatnum = (float) $floatnum;98 99		// convert a float to type int, only if possible100		if (self::trunc($floatnum) == $floatnum) {101			// it's not floating point