getid3_lib

27class getid3_lib28{29	/**30	 * @param string      $string31	 * @param bool        $hex32	 * @param bool        $spaces33	 * @param string|bool $htmlencoding34	 *35	 * @return string36	 */37	public static function PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8') {38		$returnstring = '';39		for ($i = 0; $i < strlen($string); $i++) {40			if ($hex) {41				$returnstring .= str_pad(dechex(ord($string[$i])), 2, '0', STR_PAD_LEFT);42			} else {43				$returnstring .= ' '.(preg_match("#[\x20-\x7E]#", $string[$i]) ? $string[$i] : '¤');44			}45			if ($spaces) {46				$returnstring .= ' ';47			}48		}49		if (!empty($htmlencoding)) {50			if ($htmlencoding === true) {51				$htmlencoding = 'UTF-8'; // prior to getID3 v1.9.0 the function's 4th parameter was boolean52			}53			$returnstring = htmlentities($returnstring, ENT_QUOTES, $htmlencoding);54		}55		return $returnstring;56	}57 58	/**59	 * Truncates a floating-point number at the decimal point.60	 *61	 * @param float $floatnumber62	 *63	 * @return float|int returns int (if possible, otherwise float)64	 */65	public static function trunc($floatnumber) {66		if ($floatnumber >= 1) {67			$truncatednumber = floor($floatnumber);68		} elseif ($floatnumber <= -1) {69			$truncatednumber = ceil($floatnumber);70		} else {71			$truncatednumber = 0;72		}73		if (self::intValueSupported($truncatednumber)) {74			$truncatednumber = (int) $truncatednumber;75		}76		return $truncatednumber;77	}78 79	/**80	 * @param int|null $variable81	 * @param-out int  $variable82	 * @param int      $increment83	 *84	 * @return bool85	 */86	public static function safe_inc(&$variable, $increment=1) {87		if (isset($variable)) {88			$variable += $increment;89		} else {90			$variable = $increment;91		}92		return true;93	}94 95	/**96	 * @param int|float $floatnum97	 *98	 * @return int|float99	 */100	public static function CastAsInt($floatnum) {101		// convert to float if not already102		$floatnum = (float) $floatnum;103 104		// convert a float to type int, only if possible105		if (self::trunc($floatnum) == $floatnum) {106			// it's not floating point