getid3.lib.php - angelovcom.net - Unnamed repository; edit this file 'description' to name the repository.

getid3.lib.php (52814B)
      1 <?php
      2 
      3 /////////////////////////////////////////////////////////////////
      4 /// getID3() by James Heinrich <info@getid3.org>               //
      5 //  available at https://github.com/JamesHeinrich/getID3       //
      6 //            or https://www.getid3.org                        //
      7 //            or http://getid3.sourceforge.net                 //
      8 //                                                             //
      9 // getid3.lib.php - part of getID3()                           //
     10 //  see readme.txt for more details                            //
     11 //                                                            ///
     12 /////////////////////////////////////////////////////////////////
     13 
     14 
     15 class getid3_lib
     16 {
     17 	/**
     18 	 * @param string      $string
     19 	 * @param bool        $hex
     20 	 * @param bool        $spaces
     21 	 * @param string|bool $htmlencoding
     22 	 *
     23 	 * @return string
     24 	 */
     25 	public static function PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8') {
     26 		$returnstring = '';
     27 		for ($i = 0; $i < strlen($string); $i++) {
     28 			if ($hex) {
     29 				$returnstring .= str_pad(dechex(ord($string[$i])), 2, '0', STR_PAD_LEFT);
     30 			} else {
     31 				$returnstring .= ' '.(preg_match("#[\x20-\x7E]#", $string[$i]) ? $string[$i] : '¤');
     32 			}
     33 			if ($spaces) {
     34 				$returnstring .= ' ';
     35 			}
     36 		}
     37 		if (!empty($htmlencoding)) {
     38 			if ($htmlencoding === true) {
     39 				$htmlencoding = 'UTF-8'; // prior to getID3 v1.9.0 the function's 4th parameter was boolean
     40 			}
     41 			$returnstring = htmlentities($returnstring, ENT_QUOTES, $htmlencoding);
     42 		}
     43 		return $returnstring;
     44 	}
     45 
     46 	/**
     47 	 * Truncates a floating-point number at the decimal point.
     48 	 *
     49 	 * @param float $floatnumber
     50 	 *
     51 	 * @return float|int returns int (if possible, otherwise float)
     52 	 */
     53 	public static function trunc($floatnumber) {
     54 		if ($floatnumber >= 1) {
     55 			$truncatednumber = floor($floatnumber);
     56 		} elseif ($floatnumber <= -1) {
     57 			$truncatednumber = ceil($floatnumber);
     58 		} else {
     59 			$truncatednumber = 0;
     60 		}
     61 		if (self::intValueSupported($truncatednumber)) {
     62 			$truncatednumber = (int) $truncatednumber;
     63 		}
     64 		return $truncatednumber;
     65 	}
     66 
     67 	/**
     68 	 * @param int|null $variable
     69 	 * @param int      $increment
     70 	 *
     71 	 * @return bool
     72 	 */
     73 	public static function safe_inc(&$variable, $increment=1) {
     74 		if (isset($variable)) {
     75 			$variable += $increment;
     76 		} else {
     77 			$variable = $increment;
     78 		}
     79 		return true;
     80 	}
     81 
     82 	/**
     83 	 * @param int|float $floatnum
     84 	 *
     85 	 * @return int|float
     86 	 */
     87 	public static function CastAsInt($floatnum) {
     88 		// convert to float if not already
     89 		$floatnum = (float) $floatnum;
     90 
     91 		// convert a float to type int, only if possible
     92 		if (self::trunc($floatnum) == $floatnum) {
     93 			// it's not floating point
     94 			if (self::intValueSupported($floatnum)) {
     95 				// it's within int range
     96 				$floatnum = (int) $floatnum;
     97 			}
     98 		}
     99 		return $floatnum;
    100 	}
    101 
    102 	/**
    103 	 * @param int $num
    104 	 *
    105 	 * @return bool
    106 	 */
    107 	public static function intValueSupported($num) {
    108 		// check if integers are 64-bit
    109 		static $hasINT64 = null;
    110 		if ($hasINT64 === null) { // 10x faster than is_null()
    111 			$hasINT64 = is_int(pow(2, 31)); // 32-bit int are limited to (2^31)-1
    112 			if (!$hasINT64 && !defined('PHP_INT_MIN')) {
    113 				define('PHP_INT_MIN', ~PHP_INT_MAX);
    114 			}
    115 		}
    116 		// if integers are 64-bit - no other check required
    117 		if ($hasINT64 || (($num <= PHP_INT_MAX) && ($num >= PHP_INT_MIN))) { // phpcs:ignore PHPCompatibility.Constants.NewConstants.php_int_minFound
    118 			return true;
    119 		}
    120 		return false;
    121 	}
    122 
    123 	/**
    124 	 * @param string $fraction
    125 	 *
    126 	 * @return float
    127 	 */
    128 	public static function DecimalizeFraction($fraction) {
    129 		list($numerator, $denominator) = explode('/', $fraction);
    130 		return $numerator / ($denominator ? $denominator : 1);
    131 	}
    132 
    133 	/**
    134 	 * @param string $binarynumerator
    135 	 *
    136 	 * @return float
    137 	 */
    138 	public static function DecimalBinary2Float($binarynumerator) {
    139 		$numerator   = self::Bin2Dec($binarynumerator);
    140 		$denominator = self::Bin2Dec('1'.str_repeat('0', strlen($binarynumerator)));
    141 		return ($numerator / $denominator);
    142 	}
    143 
    144 	/**
    145 	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
    146 	 *
    147 	 * @param string $binarypointnumber
    148 	 * @param int    $maxbits
    149 	 *
    150 	 * @return array
    151 	 */
    152 	public static function NormalizeBinaryPoint($binarypointnumber, $maxbits=52) {
    153 		if (strpos($binarypointnumber, '.') === false) {
    154 			$binarypointnumber = '0.'.$binarypointnumber;
    155 		} elseif ($binarypointnumber[0] == '.') {
    156 			$binarypointnumber = '0'.$binarypointnumber;
    157 		}
    158 		$exponent = 0;
    159 		while (($binarypointnumber[0] != '1') || (substr($binarypointnumber, 1, 1) != '.')) {
    160 			if (substr($binarypointnumber, 1, 1) == '.') {
    161 				$exponent--;
    162 				$binarypointnumber = substr($binarypointnumber, 2, 1).'.'.substr($binarypointnumber, 3);
    163 			} else {
    164 				$pointpos = strpos($binarypointnumber, '.');
    165 				$exponent += ($pointpos - 1);
    166 				$binarypointnumber = str_replace('.', '', $binarypointnumber);
    167 				$binarypointnumber = $binarypointnumber[0].'.'.substr($binarypointnumber, 1);
    168 			}
    169 		}
    170 		$binarypointnumber = str_pad(substr($binarypointnumber, 0, $maxbits + 2), $maxbits + 2, '0', STR_PAD_RIGHT);
    171 		return array('normalized'=>$binarypointnumber, 'exponent'=>(int) $exponent);
    172 	}
    173 
    174 	/**
    175 	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
    176 	 *
    177 	 * @param float $floatvalue
    178 	 *
    179 	 * @return string
    180 	 */
    181 	public static function Float2BinaryDecimal($floatvalue) {
    182 		$maxbits = 128; // to how many bits of precision should the calculations be taken?
    183 		$intpart   = self::trunc($floatvalue);
    184 		$floatpart = abs($floatvalue - $intpart);
    185 		$pointbitstring = '';
    186 		while (($floatpart != 0) && (strlen($pointbitstring) < $maxbits)) {
    187 			$floatpart *= 2;
    188 			$pointbitstring .= (string) self::trunc($floatpart);
    189 			$floatpart -= self::trunc($floatpart);
    190 		}
    191 		$binarypointnumber = decbin($intpart).'.'.$pointbitstring;
    192 		return $binarypointnumber;
    193 	}
    194 
    195 	/**
    196 	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html
    197 	 *
    198 	 * @param float $floatvalue
    199 	 * @param int $bits
    200 	 *
    201 	 * @return string|false
    202 	 */
    203 	public static function Float2String($floatvalue, $bits) {
    204 		$exponentbits = 0;
    205 		$fractionbits = 0;
    206 		switch ($bits) {
    207 			case 32:
    208 				$exponentbits = 8;
    209 				$fractionbits = 23;
    210 				break;
    211 
    212 			case 64:
    213 				$exponentbits = 11;
    214 				$fractionbits = 52;
    215 				break;
    216 
    217 			default:
    218 				return false;
    219 		}
    220 		if ($floatvalue >= 0) {
    221 			$signbit = '0';
    222 		} else {
    223 			$signbit = '1';
    224 		}
    225 		$normalizedbinary  = self::NormalizeBinaryPoint(self::Float2BinaryDecimal($floatvalue), $fractionbits);
    226 		$biasedexponent    = pow(2, $exponentbits - 1) - 1 + $normalizedbinary['exponent']; // (127 or 1023) +/- exponent
    227 		$exponentbitstring = str_pad(decbin($biasedexponent), $exponentbits, '0', STR_PAD_LEFT);
    228 		$fractionbitstring = str_pad(substr($normalizedbinary['normalized'], 2), $fractionbits, '0', STR_PAD_RIGHT);
    229 
    230 		return self::BigEndian2String(self::Bin2Dec($signbit.$exponentbitstring.$fractionbitstring), $bits % 8, false);
    231 	}
    232 
    233 	/**
    234 	 * @param string $byteword
    235 	 *
    236 	 * @return float|false
    237 	 */
    238 	public static function LittleEndian2Float($byteword) {
    239 		return self::BigEndian2Float(strrev($byteword));
    240 	}
    241 
    242 	/**
    243 	 * ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic
    244 	 *
    245 	 * @link http://www.psc.edu/general/software/packages/ieee/ieee.html
    246 	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html
    247 	 *
    248 	 * @param string $byteword
    249 	 *
    250 	 * @return float|false
    251 	 */
    252 	public static function BigEndian2Float($byteword) {
    253 		$bitword = self::BigEndian2Bin($byteword);
    254 		if (!$bitword) {
    255 			return 0;
    256 		}
    257 		$signbit = $bitword[0];
    258 		$floatvalue = 0;
    259 		$exponentbits = 0;
    260 		$fractionbits = 0;
    261 
    262 		switch (strlen($byteword) * 8) {
    263 			case 32:
    264 				$exponentbits = 8;
    265 				$fractionbits = 23;
    266 				break;
    267 
    268 			case 64:
    269 				$exponentbits = 11;
    270 				$fractionbits = 52;
    271 				break;
    272 
    273 			case 80:
    274 				// 80-bit Apple SANE format
    275 				// http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
    276 				$exponentstring = substr($bitword, 1, 15);
    277 				$isnormalized = intval($bitword[16]);
    278 				$fractionstring = substr($bitword, 17, 63);
    279 				$exponent = pow(2, self::Bin2Dec($exponentstring) - 16383);
    280 				$fraction = $isnormalized + self::DecimalBinary2Float($fractionstring);
    281 				$floatvalue = $exponent * $fraction;
    282 				if ($signbit == '1') {
    283 					$floatvalue *= -1;
    284 				}
    285 				return $floatvalue;
    286 
    287 			default:
    288 				return false;
    289 		}
    290 		$exponentstring = substr($bitword, 1, $exponentbits);
    291 		$fractionstring = substr($bitword, $exponentbits + 1, $fractionbits);
    292 		$exponent = self::Bin2Dec($exponentstring);
    293 		$fraction = self::Bin2Dec($fractionstring);
    294 
    295 		if (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction != 0)) {
    296 			// Not a Number
    297 			$floatvalue = false;
    298 		} elseif (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction == 0)) {
    299 			if ($signbit == '1') {
    300 				$floatvalue = '-infinity';
    301 			} else {
    302 				$floatvalue = '+infinity';
    303 			}
    304 		} elseif (($exponent == 0) && ($fraction == 0)) {
    305 			if ($signbit == '1') {
    306 				$floatvalue = -0;
    307 			} else {
    308 				$floatvalue = 0;
    309 			}
    310 			$floatvalue = ($signbit ? 0 : -0);
    311 		} elseif (($exponent == 0) && ($fraction != 0)) {
    312 			// These are 'unnormalized' values
    313 			$floatvalue = pow(2, (-1 * (pow(2, $exponentbits - 1) - 2))) * self::DecimalBinary2Float($fractionstring);
    314 			if ($signbit == '1') {
    315 				$floatvalue *= -1;
    316 			}
    317 		} elseif ($exponent != 0) {
    318 			$floatvalue = pow(2, ($exponent - (pow(2, $exponentbits - 1) - 1))) * (1 + self::DecimalBinary2Float($fractionstring));
    319 			if ($signbit == '1') {
    320 				$floatvalue *= -1;
    321 			}
    322 		}
    323 		return (float) $floatvalue;
    324 	}
    325 
    326 	/**
    327 	 * @param string $byteword
    328 	 * @param bool   $synchsafe
    329 	 * @param bool   $signed
    330 	 *
    331 	 * @return int|float|false
    332 	 * @throws Exception
    333 	 */
    334 	public static function BigEndian2Int($byteword, $synchsafe=false, $signed=false) {
    335 		$intvalue = 0;
    336 		$bytewordlen = strlen($byteword);
    337 		if ($bytewordlen == 0) {
    338 			return false;
    339 		}
    340 		for ($i = 0; $i < $bytewordlen; $i++) {
    341 			if ($synchsafe) { // disregard MSB, effectively 7-bit bytes
    342 				//$intvalue = $intvalue | (ord($byteword{$i}) & 0x7F) << (($bytewordlen - 1 - $i) * 7); // faster, but runs into problems past 2^31 on 32-bit systems
    343 				$intvalue += (ord($byteword[$i]) & 0x7F) * pow(2, ($bytewordlen - 1 - $i) * 7);
    344 			} else {
    345 				$intvalue += ord($byteword[$i]) * pow(256, ($bytewordlen - 1 - $i));
    346 			}
    347 		}
    348 		if ($signed && !$synchsafe) {
    349 			// synchsafe ints are not allowed to be signed
    350 			if ($bytewordlen <= PHP_INT_SIZE) {
    351 				$signMaskBit = 0x80 << (8 * ($bytewordlen - 1));
    352 				if ($intvalue & $signMaskBit) {
    353 					$intvalue = 0 - ($intvalue & ($signMaskBit - 1));
    354 				}
    355 			} else {
    356 				throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits ('.strlen($byteword).') in self::BigEndian2Int()');
    357 			}
    358 		}
    359 		return self::CastAsInt($intvalue);
    360 	}
    361 
    362 	/**
    363 	 * @param string $byteword
    364 	 * @param bool   $signed
    365 	 *
    366 	 * @return int|float|false
    367 	 */
    368 	public static function LittleEndian2Int($byteword, $signed=false) {
    369 		return self::BigEndian2Int(strrev($byteword), false, $signed);
    370 	}
    371 
    372 	/**
    373 	 * @param string $byteword
    374 	 *
    375 	 * @return string
    376 	 */
    377 	public static function LittleEndian2Bin($byteword) {
    378 		return self::BigEndian2Bin(strrev($byteword));
    379 	}
    380 
    381 	/**
    382 	 * @param string $byteword
    383 	 *
    384 	 * @return string
    385 	 */
    386 	public static function BigEndian2Bin($byteword) {
    387 		$binvalue = '';
    388 		$bytewordlen = strlen($byteword);
    389 		for ($i = 0; $i < $bytewordlen; $i++) {
    390 			$binvalue .= str_pad(decbin(ord($byteword[$i])), 8, '0', STR_PAD_LEFT);
    391 		}
    392 		return $binvalue;
    393 	}
    394 
    395 	/**
    396 	 * @param int  $number
    397 	 * @param int  $minbytes
    398 	 * @param bool $synchsafe
    399 	 * @param bool $signed
    400 	 *
    401 	 * @return string
    402 	 * @throws Exception
    403 	 */
    404 	public static function BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false) {
    405 		if ($number < 0) {
    406 			throw new Exception('ERROR: self::BigEndian2String() does not support negative numbers');
    407 		}
    408 		$maskbyte = (($synchsafe || $signed) ? 0x7F : 0xFF);
    409 		$intstring = '';
    410 		if ($signed) {
    411 			if ($minbytes > PHP_INT_SIZE) {
    412 				throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits in self::BigEndian2String()');
    413 			}
    414 			$number = $number & (0x80 << (8 * ($minbytes - 1)));
    415 		}
    416 		while ($number != 0) {
    417 			$quotient = ($number / ($maskbyte + 1));
    418 			$intstring = chr(ceil(($quotient - floor($quotient)) * $maskbyte)).$intstring;
    419 			$number = floor($quotient);
    420 		}
    421 		return str_pad($intstring, $minbytes, "\x00", STR_PAD_LEFT);
    422 	}
    423 
    424 	/**
    425 	 * @param int $number
    426 	 *
    427 	 * @return string
    428 	 */
    429 	public static function Dec2Bin($number) {
    430 		while ($number >= 256) {
    431 			$bytes[] = (($number / 256) - (floor($number / 256))) * 256;
    432 			$number = floor($number / 256);
    433 		}
    434 		$bytes[] = $number;
    435 		$binstring = '';
    436 		for ($i = 0; $i < count($bytes); $i++) {
    437 			$binstring = (($i == count($bytes) - 1) ? decbin($bytes[$i]) : str_pad(decbin($bytes[$i]), 8, '0', STR_PAD_LEFT)).$binstring;
    438 		}
    439 		return $binstring;
    440 	}
    441 
    442 	/**
    443 	 * @param string $binstring
    444 	 * @param bool   $signed
    445 	 *
    446 	 * @return int|float
    447 	 */
    448 	public static function Bin2Dec($binstring, $signed=false) {
    449 		$signmult = 1;
    450 		if ($signed) {
    451 			if ($binstring[0] == '1') {
    452 				$signmult = -1;
    453 			}
    454 			$binstring = substr($binstring, 1);
    455 		}
    456 		$decvalue = 0;
    457 		for ($i = 0; $i < strlen($binstring); $i++) {
    458 			$decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i);
    459 		}
    460 		return self::CastAsInt($decvalue * $signmult);
    461 	}
    462 
    463 	/**
    464 	 * @param string $binstring
    465 	 *
    466 	 * @return string
    467 	 */
    468 	public static function Bin2String($binstring) {
    469 		// return 'hi' for input of '0110100001101001'
    470 		$string = '';
    471 		$binstringreversed = strrev($binstring);
    472 		for ($i = 0; $i < strlen($binstringreversed); $i += 8) {
    473 			$string = chr(self::Bin2Dec(strrev(substr($binstringreversed, $i, 8)))).$string;
    474 		}
    475 		return $string;
    476 	}
    477 
    478 	/**
    479 	 * @param int  $number
    480 	 * @param int  $minbytes
    481 	 * @param bool $synchsafe
    482 	 *
    483 	 * @return string
    484 	 */
    485 	public static function LittleEndian2String($number, $minbytes=1, $synchsafe=false) {
    486 		$intstring = '';
    487 		while ($number > 0) {
    488 			if ($synchsafe) {
    489 				$intstring = $intstring.chr($number & 127);
    490 				$number >>= 7;
    491 			} else {
    492 				$intstring = $intstring.chr($number & 255);
    493 				$number >>= 8;
    494 			}
    495 		}
    496 		return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
    497 	}
    498 
    499 	/**
    500 	 * @param mixed $array1
    501 	 * @param mixed $array2
    502 	 *
    503 	 * @return array|false
    504 	 */
    505 	public static function array_merge_clobber($array1, $array2) {
    506 		// written by kcØhireability*com
    507 		// taken from http://www.php.net/manual/en/function.array-merge-recursive.php
    508 		if (!is_array($array1) || !is_array($array2)) {
    509 			return false;
    510 		}
    511 		$newarray = $array1;
    512 		foreach ($array2 as $key => $val) {
    513 			if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
    514 				$newarray[$key] = self::array_merge_clobber($newarray[$key], $val);
    515 			} else {
    516 				$newarray[$key] = $val;
    517 			}
    518 		}
    519 		return $newarray;
    520 	}
    521 
    522 	/**
    523 	 * @param mixed $array1
    524 	 * @param mixed $array2
    525 	 *
    526 	 * @return array|false
    527 	 */
    528 	public static function array_merge_noclobber($array1, $array2) {
    529 		if (!is_array($array1) || !is_array($array2)) {
    530 			return false;
    531 		}
    532 		$newarray = $array1;
    533 		foreach ($array2 as $key => $val) {
    534 			if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
    535 				$newarray[$key] = self::array_merge_noclobber($newarray[$key], $val);
    536 			} elseif (!isset($newarray[$key])) {
    537 				$newarray[$key] = $val;
    538 			}
    539 		}
    540 		return $newarray;
    541 	}
    542 
    543 	/**
    544 	 * @param mixed $array1
    545 	 * @param mixed $array2
    546 	 *
    547 	 * @return array|false|null
    548 	 */
    549 	public static function flipped_array_merge_noclobber($array1, $array2) {
    550 		if (!is_array($array1) || !is_array($array2)) {
    551 			return false;
    552 		}
    553 		# naturally, this only works non-recursively
    554 		$newarray = array_flip($array1);
    555 		foreach (array_flip($array2) as $key => $val) {
    556 			if (!isset($newarray[$key])) {
    557 				$newarray[$key] = count($newarray);
    558 			}
    559 		}
    560 		return array_flip($newarray);
    561 	}
    562 
    563 	/**
    564 	 * @param array $theArray
    565 	 *
    566 	 * @return bool
    567 	 */
    568 	public static function ksort_recursive(&$theArray) {
    569 		ksort($theArray);
    570 		foreach ($theArray as $key => $value) {
    571 			if (is_array($value)) {
    572 				self::ksort_recursive($theArray[$key]);
    573 			}
    574 		}
    575 		return true;
    576 	}
    577 
    578 	/**
    579 	 * @param string $filename
    580 	 * @param int    $numextensions
    581 	 *
    582 	 * @return string
    583 	 */
    584 	public static function fileextension($filename, $numextensions=1) {
    585 		if (strstr($filename, '.')) {
    586 			$reversedfilename = strrev($filename);
    587 			$offset = 0;
    588 			for ($i = 0; $i < $numextensions; $i++) {
    589 				$offset = strpos($reversedfilename, '.', $offset + 1);
    590 				if ($offset === false) {
    591 					return '';
    592 				}
    593 			}
    594 			return strrev(substr($reversedfilename, 0, $offset));
    595 		}
    596 		return '';
    597 	}
    598 
    599 	/**
    600 	 * @param int $seconds
    601 	 *
    602 	 * @return string
    603 	 */
    604 	public static function PlaytimeString($seconds) {
    605 		$sign = (($seconds < 0) ? '-' : '');
    606 		$seconds = round(abs($seconds));
    607 		$H = (int) floor( $seconds                            / 3600);
    608 		$M = (int) floor(($seconds - (3600 * $H)            ) /   60);
    609 		$S = (int) round( $seconds - (3600 * $H) - (60 * $M)        );
    610 		return $sign.($H ? $H.':' : '').($H ? str_pad($M, 2, '0', STR_PAD_LEFT) : intval($M)).':'.str_pad($S, 2, 0, STR_PAD_LEFT);
    611 	}
    612 
    613 	/**
    614 	 * @param int $macdate
    615 	 *
    616 	 * @return int|float
    617 	 */
    618 	public static function DateMac2Unix($macdate) {
    619 		// Macintosh timestamp: seconds since 00:00h January 1, 1904
    620 		// UNIX timestamp:      seconds since 00:00h January 1, 1970
    621 		return self::CastAsInt($macdate - 2082844800);
    622 	}
    623 
    624 	/**
    625 	 * @param string $rawdata
    626 	 *
    627 	 * @return float
    628 	 */
    629 	public static function FixedPoint8_8($rawdata) {
    630 		return self::BigEndian2Int(substr($rawdata, 0, 1)) + (float) (self::BigEndian2Int(substr($rawdata, 1, 1)) / pow(2, 8));
    631 	}
    632 
    633 	/**
    634 	 * @param string $rawdata
    635 	 *
    636 	 * @return float
    637 	 */
    638 	public static function FixedPoint16_16($rawdata) {
    639 		return self::BigEndian2Int(substr($rawdata, 0, 2)) + (float) (self::BigEndian2Int(substr($rawdata, 2, 2)) / pow(2, 16));
    640 	}
    641 
    642 	/**
    643 	 * @param string $rawdata
    644 	 *
    645 	 * @return float
    646 	 */
    647 	public static function FixedPoint2_30($rawdata) {
    648 		$binarystring = self::BigEndian2Bin($rawdata);
    649 		return self::Bin2Dec(substr($binarystring, 0, 2)) + (float) (self::Bin2Dec(substr($binarystring, 2, 30)) / pow(2, 30));
    650 	}
    651 
    652 
    653 	/**
    654 	 * @param string $ArrayPath
    655 	 * @param string $Separator
    656 	 * @param mixed $Value
    657 	 *
    658 	 * @return array
    659 	 */
    660 	public static function CreateDeepArray($ArrayPath, $Separator, $Value) {
    661 		// assigns $Value to a nested array path:
    662 		//   $foo = self::CreateDeepArray('/path/to/my', '/', 'file.txt')
    663 		// is the same as:
    664 		//   $foo = array('path'=>array('to'=>'array('my'=>array('file.txt'))));
    665 		// or
    666 		//   $foo['path']['to']['my'] = 'file.txt';
    667 		$ArrayPath = ltrim($ArrayPath, $Separator);
    668 		if (($pos = strpos($ArrayPath, $Separator)) !== false) {
    669 			$ReturnedArray[substr($ArrayPath, 0, $pos)] = self::CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value);
    670 		} else {
    671 			$ReturnedArray[$ArrayPath] = $Value;
    672 		}
    673 		return $ReturnedArray;
    674 	}
    675 
    676 	/**
    677 	 * @param array $arraydata
    678 	 * @param bool  $returnkey
    679 	 *
    680 	 * @return int|false
    681 	 */
    682 	public static function array_max($arraydata, $returnkey=false) {
    683 		$maxvalue = false;
    684 		$maxkey   = false;
    685 		foreach ($arraydata as $key => $value) {
    686 			if (!is_array($value)) {
    687 				if (($maxvalue === false) || ($value > $maxvalue)) {
    688 					$maxvalue = $value;
    689 					$maxkey = $key;
    690 				}
    691 			}
    692 		}
    693 		return ($returnkey ? $maxkey : $maxvalue);
    694 	}
    695 
    696 	/**
    697 	 * @param array $arraydata
    698 	 * @param bool  $returnkey
    699 	 *
    700 	 * @return int|false
    701 	 */
    702 	public static function array_min($arraydata, $returnkey=false) {
    703 		$minvalue = false;
    704 		$minkey   = false;
    705 		foreach ($arraydata as $key => $value) {
    706 			if (!is_array($value)) {
    707 				if (($minvalue === false) || ($value < $minvalue)) {
    708 					$minvalue = $value;
    709 					$minkey = $key;
    710 				}
    711 			}
    712 		}
    713 		return ($returnkey ? $minkey : $minvalue);
    714 	}
    715 
    716 	/**
    717 	 * @param string $XMLstring
    718 	 *
    719 	 * @return array|false
    720 	 */
    721 	public static function XML2array($XMLstring) {
    722 		if (function_exists('simplexml_load_string') && function_exists('libxml_disable_entity_loader')) {
    723 			// http://websec.io/2012/08/27/Preventing-XEE-in-PHP.html
    724 			// https://core.trac.wordpress.org/changeset/29378
    725 			// This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading is
    726 			// disabled by default, but is still needed when LIBXML_NOENT is used.
    727 			$loader = @libxml_disable_entity_loader(true);
    728 			$XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', LIBXML_NOENT);
    729 			$return = self::SimpleXMLelement2array($XMLobject);
    730 			@libxml_disable_entity_loader($loader);
    731 			return $return;
    732 		}
    733 		return false;
    734 	}
    735 
    736 	/**
    737 	* @param SimpleXMLElement|array|mixed $XMLobject
    738 	*
    739 	* @return mixed
    740 	*/
    741 	public static function SimpleXMLelement2array($XMLobject) {
    742 		if (!is_object($XMLobject) && !is_array($XMLobject)) {
    743 			return $XMLobject;
    744 		}
    745 		$XMLarray = $XMLobject instanceof SimpleXMLElement ? get_object_vars($XMLobject) : $XMLobject;
    746 		foreach ($XMLarray as $key => $value) {
    747 			$XMLarray[$key] = self::SimpleXMLelement2array($value);
    748 		}
    749 		return $XMLarray;
    750 	}
    751 
    752 	/**
    753 	 * Returns checksum for a file from starting position to absolute end position.
    754 	 *
    755 	 * @param string $file
    756 	 * @param int    $offset
    757 	 * @param int    $end
    758 	 * @param string $algorithm
    759 	 *
    760 	 * @return string|false
    761 	 * @throws getid3_exception
    762 	 */
    763 	public static function hash_data($file, $offset, $end, $algorithm) {
    764 		if (!self::intValueSupported($end)) {
    765 			return false;
    766 		}
    767 		if (!in_array($algorithm, array('md5', 'sha1'))) {
    768 			throw new getid3_exception('Invalid algorithm ('.$algorithm.') in self::hash_data()');
    769 		}
    770 
    771 		$size = $end - $offset;
    772 
    773 		$fp = fopen($file, 'rb');
    774 		fseek($fp, $offset);
    775 		$ctx = hash_init($algorithm);
    776 		while ($size > 0) {
    777 			$buffer = fread($fp, min($size, getID3::FREAD_BUFFER_SIZE));
    778 			hash_update($ctx, $buffer);
    779 			$size -= getID3::FREAD_BUFFER_SIZE;
    780 		}
    781 		$hash = hash_final($ctx);
    782 		fclose($fp);
    783 
    784 		return $hash;
    785 	}
    786 
    787 	/**
    788 	 * @param string $filename_source
    789 	 * @param string $filename_dest
    790 	 * @param int    $offset
    791 	 * @param int    $length
    792 	 *
    793 	 * @return bool
    794 	 * @throws Exception
    795 	 *
    796 	 * @deprecated Unused, may be removed in future versions of getID3
    797 	 */
    798 	public static function CopyFileParts($filename_source, $filename_dest, $offset, $length) {
    799 		if (!self::intValueSupported($offset + $length)) {
    800 			throw new Exception('cannot copy file portion, it extends beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit');
    801 		}
    802 		if (is_readable($filename_source) && is_file($filename_source) && ($fp_src = fopen($filename_source, 'rb'))) {
    803 			if (($fp_dest = fopen($filename_dest, 'wb'))) {
    804 				if (fseek($fp_src, $offset) == 0) {
    805 					$byteslefttowrite = $length;
    806 					while (($byteslefttowrite > 0) && ($buffer = fread($fp_src, min($byteslefttowrite, getID3::FREAD_BUFFER_SIZE)))) {
    807 						$byteswritten = fwrite($fp_dest, $buffer, $byteslefttowrite);
    808 						$byteslefttowrite -= $byteswritten;
    809 					}
    810 					fclose($fp_dest);
    811 					return true;
    812 				} else {
    813 					fclose($fp_src);
    814 					throw new Exception('failed to seek to offset '.$offset.' in '.$filename_source);
    815 				}
    816 			} else {
    817 				throw new Exception('failed to create file for writing '.$filename_dest);
    818 			}
    819 		} else {
    820 			throw new Exception('failed to open file for reading '.$filename_source);
    821 		}
    822 	}
    823 
    824 	/**
    825 	 * @param int $charval
    826 	 *
    827 	 * @return string
    828 	 */
    829 	public static function iconv_fallback_int_utf8($charval) {
    830 		if ($charval < 128) {
    831 			// 0bbbbbbb
    832 			$newcharstring = chr($charval);
    833 		} elseif ($charval < 2048) {
    834 			// 110bbbbb 10bbbbbb
    835 			$newcharstring  = chr(($charval >>   6) | 0xC0);
    836 			$newcharstring .= chr(($charval & 0x3F) | 0x80);
    837 		} elseif ($charval < 65536) {
    838 			// 1110bbbb 10bbbbbb 10bbbbbb
    839 			$newcharstring  = chr(($charval >>  12) | 0xE0);
    840 			$newcharstring .= chr(($charval >>   6) | 0xC0);
    841 			$newcharstring .= chr(($charval & 0x3F) | 0x80);
    842 		} else {
    843 			// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
    844 			$newcharstring  = chr(($charval >>  18) | 0xF0);
    845 			$newcharstring .= chr(($charval >>  12) | 0xC0);
    846 			$newcharstring .= chr(($charval >>   6) | 0xC0);
    847 			$newcharstring .= chr(($charval & 0x3F) | 0x80);
    848 		}
    849 		return $newcharstring;
    850 	}
    851 
    852 	/**
    853 	 * ISO-8859-1 => UTF-8
    854 	 *
    855 	 * @param string $string
    856 	 * @param bool   $bom
    857 	 *
    858 	 * @return string
    859 	 */
    860 	public static function iconv_fallback_iso88591_utf8($string, $bom=false) {
    861 		if (function_exists('utf8_encode')) {
    862 			return utf8_encode($string);
    863 		}
    864 		// utf8_encode() unavailable, use getID3()'s iconv_fallback() conversions (possibly PHP is compiled without XML support)
    865 		$newcharstring = '';
    866 		if ($bom) {
    867 			$newcharstring .= "\xEF\xBB\xBF";
    868 		}
    869 		for ($i = 0; $i < strlen($string); $i++) {
    870 			$charval = ord($string[$i]);
    871 			$newcharstring .= self::iconv_fallback_int_utf8($charval);
    872 		}
    873 		return $newcharstring;
    874 	}
    875 
    876 	/**
    877 	 * ISO-8859-1 => UTF-16BE
    878 	 *
    879 	 * @param string $string
    880 	 * @param bool   $bom
    881 	 *
    882 	 * @return string
    883 	 */
    884 	public static function iconv_fallback_iso88591_utf16be($string, $bom=false) {
    885 		$newcharstring = '';
    886 		if ($bom) {
    887 			$newcharstring .= "\xFE\xFF";
    888 		}
    889 		for ($i = 0; $i < strlen($string); $i++) {
    890 			$newcharstring .= "\x00".$string[$i];
    891 		}
    892 		return $newcharstring;
    893 	}
    894 
    895 	/**
    896 	 * ISO-8859-1 => UTF-16LE
    897 	 *
    898 	 * @param string $string
    899 	 * @param bool   $bom
    900 	 *
    901 	 * @return string
    902 	 */
    903 	public static function iconv_fallback_iso88591_utf16le($string, $bom=false) {
    904 		$newcharstring = '';
    905 		if ($bom) {
    906 			$newcharstring .= "\xFF\xFE";
    907 		}
    908 		for ($i = 0; $i < strlen($string); $i++) {
    909 			$newcharstring .= $string[$i]."\x00";
    910 		}
    911 		return $newcharstring;
    912 	}
    913 
    914 	/**
    915 	 * ISO-8859-1 => UTF-16LE (BOM)
    916 	 *
    917 	 * @param string $string
    918 	 *
    919 	 * @return string
    920 	 */
    921 	public static function iconv_fallback_iso88591_utf16($string) {
    922 		return self::iconv_fallback_iso88591_utf16le($string, true);
    923 	}
    924 
    925 	/**
    926 	 * UTF-8 => ISO-8859-1
    927 	 *
    928 	 * @param string $string
    929 	 *
    930 	 * @return string
    931 	 */
    932 	public static function iconv_fallback_utf8_iso88591($string) {
    933 		if (function_exists('utf8_decode')) {
    934 			return utf8_decode($string);
    935 		}
    936 		// utf8_decode() unavailable, use getID3()'s iconv_fallback() conversions (possibly PHP is compiled without XML support)
    937 		$newcharstring = '';
    938 		$offset = 0;
    939 		$stringlength = strlen($string);
    940 		while ($offset < $stringlength) {
    941 			if ((ord($string[$offset]) | 0x07) == 0xF7) {
    942 				// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
    943 				$charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
    944 						   ((ord($string[($offset + 1)]) & 0x3F) << 12) &
    945 						   ((ord($string[($offset + 2)]) & 0x3F) <<  6) &
    946 							(ord($string[($offset + 3)]) & 0x3F);
    947 				$offset += 4;
    948 			} elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
    949 				// 1110bbbb 10bbbbbb 10bbbbbb
    950 				$charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
    951 						   ((ord($string[($offset + 1)]) & 0x3F) <<  6) &
    952 							(ord($string[($offset + 2)]) & 0x3F);
    953 				$offset += 3;
    954 			} elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
    955 				// 110bbbbb 10bbbbbb
    956 				$charval = ((ord($string[($offset + 0)]) & 0x1F) <<  6) &
    957 							(ord($string[($offset + 1)]) & 0x3F);
    958 				$offset += 2;
    959 			} elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
    960 				// 0bbbbbbb
    961 				$charval = ord($string[$offset]);
    962 				$offset += 1;
    963 			} else {
    964 				// error? throw some kind of warning here?
    965 				$charval = false;
    966 				$offset += 1;
    967 			}
    968 			if ($charval !== false) {
    969 				$newcharstring .= (($charval < 256) ? chr($charval) : '?');
    970 			}
    971 		}
    972 		return $newcharstring;
    973 	}
    974 
    975 	/**
    976 	 * UTF-8 => UTF-16BE
    977 	 *
    978 	 * @param string $string
    979 	 * @param bool   $bom
    980 	 *
    981 	 * @return string
    982 	 */
    983 	public static function iconv_fallback_utf8_utf16be($string, $bom=false) {
    984 		$newcharstring = '';
    985 		if ($bom) {
    986 			$newcharstring .= "\xFE\xFF";
    987 		}
    988 		$offset = 0;
    989 		$stringlength = strlen($string);
    990 		while ($offset < $stringlength) {
    991 			if ((ord($string[$offset]) | 0x07) == 0xF7) {
    992 				// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
    993 				$charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
    994 						   ((ord($string[($offset + 1)]) & 0x3F) << 12) &
    995 						   ((ord($string[($offset + 2)]) & 0x3F) <<  6) &
    996 							(ord($string[($offset + 3)]) & 0x3F);
    997 				$offset += 4;
    998 			} elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
    999 				// 1110bbbb 10bbbbbb 10bbbbbb
   1000 				$charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
   1001 						   ((ord($string[($offset + 1)]) & 0x3F) <<  6) &
   1002 							(ord($string[($offset + 2)]) & 0x3F);
   1003 				$offset += 3;
   1004 			} elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
   1005 				// 110bbbbb 10bbbbbb
   1006 				$charval = ((ord($string[($offset + 0)]) & 0x1F) <<  6) &
   1007 							(ord($string[($offset + 1)]) & 0x3F);
   1008 				$offset += 2;
   1009 			} elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
   1010 				// 0bbbbbbb
   1011 				$charval = ord($string[$offset]);
   1012 				$offset += 1;
   1013 			} else {
   1014 				// error? throw some kind of warning here?
   1015 				$charval = false;
   1016 				$offset += 1;
   1017 			}
   1018 			if ($charval !== false) {
   1019 				$newcharstring .= (($charval < 65536) ? self::BigEndian2String($charval, 2) : "\x00".'?');
   1020 			}
   1021 		}
   1022 		return $newcharstring;
   1023 	}
   1024 
   1025 	/**
   1026 	 * UTF-8 => UTF-16LE
   1027 	 *
   1028 	 * @param string $string
   1029 	 * @param bool   $bom
   1030 	 *
   1031 	 * @return string
   1032 	 */
   1033 	public static function iconv_fallback_utf8_utf16le($string, $bom=false) {
   1034 		$newcharstring = '';
   1035 		if ($bom) {
   1036 			$newcharstring .= "\xFF\xFE";
   1037 		}
   1038 		$offset = 0;
   1039 		$stringlength = strlen($string);
   1040 		while ($offset < $stringlength) {
   1041 			if ((ord($string[$offset]) | 0x07) == 0xF7) {
   1042 				// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
   1043 				$charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
   1044 						   ((ord($string[($offset + 1)]) & 0x3F) << 12) &
   1045 						   ((ord($string[($offset + 2)]) & 0x3F) <<  6) &
   1046 							(ord($string[($offset + 3)]) & 0x3F);
   1047 				$offset += 4;
   1048 			} elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
   1049 				// 1110bbbb 10bbbbbb 10bbbbbb
   1050 				$charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
   1051 						   ((ord($string[($offset + 1)]) & 0x3F) <<  6) &
   1052 							(ord($string[($offset + 2)]) & 0x3F);
   1053 				$offset += 3;
   1054 			} elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
   1055 				// 110bbbbb 10bbbbbb
   1056 				$charval = ((ord($string[($offset + 0)]) & 0x1F) <<  6) &
   1057 							(ord($string[($offset + 1)]) & 0x3F);
   1058 				$offset += 2;
   1059 			} elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
   1060 				// 0bbbbbbb
   1061 				$charval = ord($string[$offset]);
   1062 				$offset += 1;
   1063 			} else {
   1064 				// error? maybe throw some warning here?
   1065 				$charval = false;
   1066 				$offset += 1;
   1067 			}
   1068 			if ($charval !== false) {
   1069 				$newcharstring .= (($charval < 65536) ? self::LittleEndian2String($charval, 2) : '?'."\x00");
   1070 			}
   1071 		}
   1072 		return $newcharstring;
   1073 	}
   1074 
   1075 	/**
   1076 	 * UTF-8 => UTF-16LE (BOM)
   1077 	 *
   1078 	 * @param string $string
   1079 	 *
   1080 	 * @return string
   1081 	 */
   1082 	public static function iconv_fallback_utf8_utf16($string) {
   1083 		return self::iconv_fallback_utf8_utf16le($string, true);
   1084 	}
   1085 
   1086 	/**
   1087 	 * UTF-16BE => UTF-8
   1088 	 *
   1089 	 * @param string $string
   1090 	 *
   1091 	 * @return string
   1092 	 */
   1093 	public static function iconv_fallback_utf16be_utf8($string) {
   1094 		if (substr($string, 0, 2) == "\xFE\xFF") {
   1095 			// strip BOM
   1096 			$string = substr($string, 2);
   1097 		}
   1098 		$newcharstring = '';
   1099 		for ($i = 0; $i < strlen($string); $i += 2) {
   1100 			$charval = self::BigEndian2Int(substr($string, $i, 2));
   1101 			$newcharstring .= self::iconv_fallback_int_utf8($charval);
   1102 		}
   1103 		return $newcharstring;
   1104 	}
   1105 
   1106 	/**
   1107 	 * UTF-16LE => UTF-8
   1108 	 *
   1109 	 * @param string $string
   1110 	 *
   1111 	 * @return string
   1112 	 */
   1113 	public static function iconv_fallback_utf16le_utf8($string) {
   1114 		if (substr($string, 0, 2) == "\xFF\xFE") {
   1115 			// strip BOM
   1116 			$string = substr($string, 2);
   1117 		}
   1118 		$newcharstring = '';
   1119 		for ($i = 0; $i < strlen($string); $i += 2) {
   1120 			$charval = self::LittleEndian2Int(substr($string, $i, 2));
   1121 			$newcharstring .= self::iconv_fallback_int_utf8($charval);
   1122 		}
   1123 		return $newcharstring;
   1124 	}
   1125 
   1126 	/**
   1127 	 * UTF-16BE => ISO-8859-1
   1128 	 *
   1129 	 * @param string $string
   1130 	 *
   1131 	 * @return string
   1132 	 */
   1133 	public static function iconv_fallback_utf16be_iso88591($string) {
   1134 		if (substr($string, 0, 2) == "\xFE\xFF") {
   1135 			// strip BOM
   1136 			$string = substr($string, 2);
   1137 		}
   1138 		$newcharstring = '';
   1139 		for ($i = 0; $i < strlen($string); $i += 2) {
   1140 			$charval = self::BigEndian2Int(substr($string, $i, 2));
   1141 			$newcharstring .= (($charval < 256) ? chr($charval) : '?');
   1142 		}
   1143 		return $newcharstring;
   1144 	}
   1145 
   1146 	/**
   1147 	 * UTF-16LE => ISO-8859-1
   1148 	 *
   1149 	 * @param string $string
   1150 	 *
   1151 	 * @return string
   1152 	 */
   1153 	public static function iconv_fallback_utf16le_iso88591($string) {
   1154 		if (substr($string, 0, 2) == "\xFF\xFE") {
   1155 			// strip BOM
   1156 			$string = substr($string, 2);
   1157 		}
   1158 		$newcharstring = '';
   1159 		for ($i = 0; $i < strlen($string); $i += 2) {
   1160 			$charval = self::LittleEndian2Int(substr($string, $i, 2));
   1161 			$newcharstring .= (($charval < 256) ? chr($charval) : '?');
   1162 		}
   1163 		return $newcharstring;
   1164 	}
   1165 
   1166 	/**
   1167 	 * UTF-16 (BOM) => ISO-8859-1
   1168 	 *
   1169 	 * @param string $string
   1170 	 *
   1171 	 * @return string
   1172 	 */
   1173 	public static function iconv_fallback_utf16_iso88591($string) {
   1174 		$bom = substr($string, 0, 2);
   1175 		if ($bom == "\xFE\xFF") {
   1176 			return self::iconv_fallback_utf16be_iso88591(substr($string, 2));
   1177 		} elseif ($bom == "\xFF\xFE") {
   1178 			return self::iconv_fallback_utf16le_iso88591(substr($string, 2));
   1179 		}
   1180 		return $string;
   1181 	}
   1182 
   1183 	/**
   1184 	 * UTF-16 (BOM) => UTF-8
   1185 	 *
   1186 	 * @param string $string
   1187 	 *
   1188 	 * @return string
   1189 	 */
   1190 	public static function iconv_fallback_utf16_utf8($string) {
   1191 		$bom = substr($string, 0, 2);
   1192 		if ($bom == "\xFE\xFF") {
   1193 			return self::iconv_fallback_utf16be_utf8(substr($string, 2));
   1194 		} elseif ($bom == "\xFF\xFE") {
   1195 			return self::iconv_fallback_utf16le_utf8(substr($string, 2));
   1196 		}
   1197 		return $string;
   1198 	}
   1199 
   1200 	/**
   1201 	 * @param string $in_charset
   1202 	 * @param string $out_charset
   1203 	 * @param string $string
   1204 	 *
   1205 	 * @return string
   1206 	 * @throws Exception
   1207 	 */
   1208 	public static function iconv_fallback($in_charset, $out_charset, $string) {
   1209 
   1210 		if ($in_charset == $out_charset) {
   1211 			return $string;
   1212 		}
   1213 
   1214 		// mb_convert_encoding() available
   1215 		if (function_exists('mb_convert_encoding')) {
   1216 			if ((strtoupper($in_charset) == 'UTF-16') && (substr($string, 0, 2) != "\xFE\xFF") && (substr($string, 0, 2) != "\xFF\xFE")) {
   1217 				// if BOM missing, mb_convert_encoding will mishandle the conversion, assume UTF-16BE and prepend appropriate BOM
   1218 				$string = "\xFF\xFE".$string;
   1219 			}
   1220 			if ((strtoupper($in_charset) == 'UTF-16') && (strtoupper($out_charset) == 'UTF-8')) {
   1221 				if (($string == "\xFF\xFE") || ($string == "\xFE\xFF")) {
   1222 					// if string consists of only BOM, mb_convert_encoding will return the BOM unmodified
   1223 					return '';
   1224 				}
   1225 			}
   1226 			if ($converted_string = @mb_convert_encoding($string, $out_charset, $in_charset)) {
   1227 				switch ($out_charset) {
   1228 					case 'ISO-8859-1':
   1229 						$converted_string = rtrim($converted_string, "\x00");
   1230 						break;
   1231 				}
   1232 				return $converted_string;
   1233 			}
   1234 			return $string;
   1235 
   1236 		// iconv() available
   1237 		} elseif (function_exists('iconv')) {
   1238 			if ($converted_string = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) {
   1239 				switch ($out_charset) {
   1240 					case 'ISO-8859-1':
   1241 						$converted_string = rtrim($converted_string, "\x00");
   1242 						break;
   1243 				}
   1244 				return $converted_string;
   1245 			}
   1246 
   1247 			// iconv() may sometimes fail with "illegal character in input string" error message
   1248 			// and return an empty string, but returning the unconverted string is more useful
   1249 			return $string;
   1250 		}
   1251 
   1252 
   1253 		// neither mb_convert_encoding or iconv() is available
   1254 		static $ConversionFunctionList = array();
   1255 		if (empty($ConversionFunctionList)) {
   1256 			$ConversionFunctionList['ISO-8859-1']['UTF-8']    = 'iconv_fallback_iso88591_utf8';
   1257 			$ConversionFunctionList['ISO-8859-1']['UTF-16']   = 'iconv_fallback_iso88591_utf16';
   1258 			$ConversionFunctionList['ISO-8859-1']['UTF-16BE'] = 'iconv_fallback_iso88591_utf16be';
   1259 			$ConversionFunctionList['ISO-8859-1']['UTF-16LE'] = 'iconv_fallback_iso88591_utf16le';
   1260 			$ConversionFunctionList['UTF-8']['ISO-8859-1']    = 'iconv_fallback_utf8_iso88591';
   1261 			$ConversionFunctionList['UTF-8']['UTF-16']        = 'iconv_fallback_utf8_utf16';
   1262 			$ConversionFunctionList['UTF-8']['UTF-16BE']      = 'iconv_fallback_utf8_utf16be';
   1263 			$ConversionFunctionList['UTF-8']['UTF-16LE']      = 'iconv_fallback_utf8_utf16le';
   1264 			$ConversionFunctionList['UTF-16']['ISO-8859-1']   = 'iconv_fallback_utf16_iso88591';
   1265 			$ConversionFunctionList['UTF-16']['UTF-8']        = 'iconv_fallback_utf16_utf8';
   1266 			$ConversionFunctionList['UTF-16LE']['ISO-8859-1'] = 'iconv_fallback_utf16le_iso88591';
   1267 			$ConversionFunctionList['UTF-16LE']['UTF-8']      = 'iconv_fallback_utf16le_utf8';
   1268 			$ConversionFunctionList['UTF-16BE']['ISO-8859-1'] = 'iconv_fallback_utf16be_iso88591';
   1269 			$ConversionFunctionList['UTF-16BE']['UTF-8']      = 'iconv_fallback_utf16be_utf8';
   1270 		}
   1271 		if (isset($ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)])) {
   1272 			$ConversionFunction = $ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)];
   1273 			return self::$ConversionFunction($string);
   1274 		}
   1275 		throw new Exception('PHP does not has mb_convert_encoding() or iconv() support - cannot convert from '.$in_charset.' to '.$out_charset);
   1276 	}
   1277 
   1278 	/**
   1279 	 * @param mixed  $data
   1280 	 * @param string $charset
   1281 	 *
   1282 	 * @return mixed
   1283 	 */
   1284 	public static function recursiveMultiByteCharString2HTML($data, $charset='ISO-8859-1') {
   1285 		if (is_string($data)) {
   1286 			return self::MultiByteCharString2HTML($data, $charset);
   1287 		} elseif (is_array($data)) {
   1288 			$return_data = array();
   1289 			foreach ($data as $key => $value) {
   1290 				$return_data[$key] = self::recursiveMultiByteCharString2HTML($value, $charset);
   1291 			}
   1292 			return $return_data;
   1293 		}
   1294 		// integer, float, objects, resources, etc
   1295 		return $data;
   1296 	}
   1297 
   1298 	/**
   1299 	 * @param string|int|float $string
   1300 	 * @param string           $charset
   1301 	 *
   1302 	 * @return string
   1303 	 */
   1304 	public static function MultiByteCharString2HTML($string, $charset='ISO-8859-1') {
   1305 		$string = (string) $string; // in case trying to pass a numeric (float, int) string, would otherwise return an empty string
   1306 		$HTMLstring = '';
   1307 
   1308 		switch (strtolower($charset)) {
   1309 			case '1251':
   1310 			case '1252':
   1311 			case '866':
   1312 			case '932':
   1313 			case '936':
   1314 			case '950':
   1315 			case 'big5':
   1316 			case 'big5-hkscs':
   1317 			case 'cp1251':
   1318 			case 'cp1252':
   1319 			case 'cp866':
   1320 			case 'euc-jp':
   1321 			case 'eucjp':
   1322 			case 'gb2312':
   1323 			case 'ibm866':
   1324 			case 'iso-8859-1':
   1325 			case 'iso-8859-15':
   1326 			case 'iso8859-1':
   1327 			case 'iso8859-15':
   1328 			case 'koi8-r':
   1329 			case 'koi8-ru':
   1330 			case 'koi8r':
   1331 			case 'shift_jis':
   1332 			case 'sjis':
   1333 			case 'win-1251':
   1334 			case 'windows-1251':
   1335 			case 'windows-1252':
   1336 				$HTMLstring = htmlentities($string, ENT_COMPAT, $charset);
   1337 				break;
   1338 
   1339 			case 'utf-8':
   1340 				$strlen = strlen($string);
   1341 				for ($i = 0; $i < $strlen; $i++) {
   1342 					$char_ord_val = ord($string[$i]);
   1343 					$charval = 0;
   1344 					if ($char_ord_val < 0x80) {
   1345 						$charval = $char_ord_val;
   1346 					} elseif ((($char_ord_val & 0xF0) >> 4) == 0x0F  &&  $i+3 < $strlen) {
   1347 						$charval  = (($char_ord_val & 0x07) << 18);
   1348 						$charval += ((ord($string[++$i]) & 0x3F) << 12);
   1349 						$charval += ((ord($string[++$i]) & 0x3F) << 6);
   1350 						$charval +=  (ord($string[++$i]) & 0x3F);
   1351 					} elseif ((($char_ord_val & 0xE0) >> 5) == 0x07  &&  $i+2 < $strlen) {
   1352 						$charval  = (($char_ord_val & 0x0F) << 12);
   1353 						$charval += ((ord($string[++$i]) & 0x3F) << 6);
   1354 						$charval +=  (ord($string[++$i]) & 0x3F);
   1355 					} elseif ((($char_ord_val & 0xC0) >> 6) == 0x03  &&  $i+1 < $strlen) {
   1356 						$charval  = (($char_ord_val & 0x1F) << 6);
   1357 						$charval += (ord($string[++$i]) & 0x3F);
   1358 					}
   1359 					if (($charval >= 32) && ($charval <= 127)) {
   1360 						$HTMLstring .= htmlentities(chr($charval));
   1361 					} else {
   1362 						$HTMLstring .= '&#'.$charval.';';
   1363 					}
   1364 				}
   1365 				break;
   1366 
   1367 			case 'utf-16le':
   1368 				for ($i = 0; $i < strlen($string); $i += 2) {
   1369 					$charval = self::LittleEndian2Int(substr($string, $i, 2));
   1370 					if (($charval >= 32) && ($charval <= 127)) {
   1371 						$HTMLstring .= chr($charval);
   1372 					} else {
   1373 						$HTMLstring .= '&#'.$charval.';';
   1374 					}
   1375 				}
   1376 				break;
   1377 
   1378 			case 'utf-16be':
   1379 				for ($i = 0; $i < strlen($string); $i += 2) {
   1380 					$charval = self::BigEndian2Int(substr($string, $i, 2));
   1381 					if (($charval >= 32) && ($charval <= 127)) {
   1382 						$HTMLstring .= chr($charval);
   1383 					} else {
   1384 						$HTMLstring .= '&#'.$charval.';';
   1385 					}
   1386 				}
   1387 				break;
   1388 
   1389 			default:
   1390 				$HTMLstring = 'ERROR: Character set "'.$charset.'" not supported in MultiByteCharString2HTML()';
   1391 				break;
   1392 		}
   1393 		return $HTMLstring;
   1394 	}
   1395 
   1396 	/**
   1397 	 * @param int $namecode
   1398 	 *
   1399 	 * @return string
   1400 	 */
   1401 	public static function RGADnameLookup($namecode) {
   1402 		static $RGADname = array();
   1403 		if (empty($RGADname)) {
   1404 			$RGADname[0] = 'not set';
   1405 			$RGADname[1] = 'Track Gain Adjustment';
   1406 			$RGADname[2] = 'Album Gain Adjustment';
   1407 		}
   1408 
   1409 		return (isset($RGADname[$namecode]) ? $RGADname[$namecode] : '');
   1410 	}
   1411 
   1412 	/**
   1413 	 * @param int $originatorcode
   1414 	 *
   1415 	 * @return string
   1416 	 */
   1417 	public static function RGADoriginatorLookup($originatorcode) {
   1418 		static $RGADoriginator = array();
   1419 		if (empty($RGADoriginator)) {
   1420 			$RGADoriginator[0] = 'unspecified';
   1421 			$RGADoriginator[1] = 'pre-set by artist/producer/mastering engineer';
   1422 			$RGADoriginator[2] = 'set by user';
   1423 			$RGADoriginator[3] = 'determined automatically';
   1424 		}
   1425 
   1426 		return (isset($RGADoriginator[$originatorcode]) ? $RGADoriginator[$originatorcode] : '');
   1427 	}
   1428 
   1429 	/**
   1430 	 * @param int $rawadjustment
   1431 	 * @param int $signbit
   1432 	 *
   1433 	 * @return float
   1434 	 */
   1435 	public static function RGADadjustmentLookup($rawadjustment, $signbit) {
   1436 		$adjustment = (float) $rawadjustment / 10;
   1437 		if ($signbit == 1) {
   1438 			$adjustment *= -1;
   1439 		}
   1440 		return $adjustment;
   1441 	}
   1442 
   1443 	/**
   1444 	 * @param int $namecode
   1445 	 * @param int $originatorcode
   1446 	 * @param int $replaygain
   1447 	 *
   1448 	 * @return string
   1449 	 */
   1450 	public static function RGADgainString($namecode, $originatorcode, $replaygain) {
   1451 		if ($replaygain < 0) {
   1452 			$signbit = '1';
   1453 		} else {
   1454 			$signbit = '0';
   1455 		}
   1456 		$storedreplaygain = intval(round($replaygain * 10));
   1457 		$gainstring  = str_pad(decbin($namecode), 3, '0', STR_PAD_LEFT);
   1458 		$gainstring .= str_pad(decbin($originatorcode), 3, '0', STR_PAD_LEFT);
   1459 		$gainstring .= $signbit;
   1460 		$gainstring .= str_pad(decbin($storedreplaygain), 9, '0', STR_PAD_LEFT);
   1461 
   1462 		return $gainstring;
   1463 	}
   1464 
   1465 	/**
   1466 	 * @param float $amplitude
   1467 	 *
   1468 	 * @return float
   1469 	 */
   1470 	public static function RGADamplitude2dB($amplitude) {
   1471 		return 20 * log10($amplitude);
   1472 	}
   1473 
   1474 	/**
   1475 	 * @param string $imgData
   1476 	 * @param array  $imageinfo
   1477 	 *
   1478 	 * @return array|false
   1479 	 */
   1480 	public static function GetDataImageSize($imgData, &$imageinfo=array()) {
   1481 		if (PHP_VERSION_ID >= 50400) {
   1482 			$GetDataImageSize = @getimagesizefromstring($imgData, $imageinfo);
   1483 			if ($GetDataImageSize === false || !isset($GetDataImageSize[0], $GetDataImageSize[1])) {
   1484 				return false;
   1485 			}
   1486 			$GetDataImageSize['height'] = $GetDataImageSize[0];
   1487 			$GetDataImageSize['width'] = $GetDataImageSize[1];
   1488 			return $GetDataImageSize;
   1489 		}
   1490 		static $tempdir = '';
   1491 		if (empty($tempdir)) {
   1492 			if (function_exists('sys_get_temp_dir')) {
   1493 				$tempdir = sys_get_temp_dir(); // https://github.com/JamesHeinrich/getID3/issues/52
   1494 			}
   1495 
   1496 			// yes this is ugly, feel free to suggest a better way
   1497 			if (include_once(dirname(__FILE__).'/getid3.php')) {
   1498 				$getid3_temp = new getID3();
   1499 				if ($getid3_temp_tempdir = $getid3_temp->tempdir) {
   1500 					$tempdir = $getid3_temp_tempdir;
   1501 				}
   1502 				unset($getid3_temp, $getid3_temp_tempdir);
   1503 			}
   1504 		}
   1505 		$GetDataImageSize = false;
   1506 		if ($tempfilename = tempnam($tempdir, 'gI3')) {
   1507 			if (is_writable($tempfilename) && is_file($tempfilename) && ($tmp = fopen($tempfilename, 'wb'))) {
   1508 				fwrite($tmp, $imgData);
   1509 				fclose($tmp);
   1510 				$GetDataImageSize = @getimagesize($tempfilename, $imageinfo);
   1511 				if (($GetDataImageSize === false) || !isset($GetDataImageSize[0]) || !isset($GetDataImageSize[1])) {
   1512 					return false;
   1513 				}
   1514 				$GetDataImageSize['height'] = $GetDataImageSize[0];
   1515 				$GetDataImageSize['width']  = $GetDataImageSize[1];
   1516 			}
   1517 			unlink($tempfilename);
   1518 		}
   1519 		return $GetDataImageSize;
   1520 	}
   1521 
   1522 	/**
   1523 	 * @param string $mime_type
   1524 	 *
   1525 	 * @return string
   1526 	 */
   1527 	public static function ImageExtFromMime($mime_type) {
   1528 		// temporary way, works OK for now, but should be reworked in the future
   1529 		return str_replace(array('image/', 'x-', 'jpeg'), array('', '', 'jpg'), $mime_type);
   1530 	}
   1531 
   1532 	/**
   1533 	 * @param array $ThisFileInfo
   1534 	 * @param bool  $option_tags_html default true (just as in the main getID3 class)
   1535 	 *
   1536 	 * @return bool
   1537 	 */
   1538 	public static function CopyTagsToComments(&$ThisFileInfo, $option_tags_html=true) {
   1539 		// Copy all entries from ['tags'] into common ['comments']
   1540 		if (!empty($ThisFileInfo['tags'])) {
   1541 			if (isset($ThisFileInfo['tags']['id3v1'])) {
   1542 				// bubble ID3v1 to the end, if present to aid in detecting bad ID3v1 encodings
   1543 				$ID3v1 = $ThisFileInfo['tags']['id3v1'];
   1544 				unset($ThisFileInfo['tags']['id3v1']);
   1545 				$ThisFileInfo['tags']['id3v1'] = $ID3v1;
   1546 				unset($ID3v1);
   1547 			}
   1548 			foreach ($ThisFileInfo['tags'] as $tagtype => $tagarray) {
   1549 				foreach ($tagarray as $tagname => $tagdata) {
   1550 					foreach ($tagdata as $key => $value) {
   1551 						if (!empty($value)) {
   1552 							if (empty($ThisFileInfo['comments'][$tagname])) {
   1553 
   1554 								// fall through and append value
   1555 
   1556 							} elseif ($tagtype == 'id3v1') {
   1557 
   1558 								$newvaluelength = strlen(trim($value));
   1559 								foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) {
   1560 									$oldvaluelength = strlen(trim($existingvalue));
   1561 									if (($newvaluelength <= $oldvaluelength) && (substr($existingvalue, 0, $newvaluelength) == trim($value))) {
   1562 										// new value is identical but shorter-than (or equal-length to) one already in comments - skip
   1563 										break 2;
   1564 									}
   1565 								}
   1566 								if (function_exists('mb_convert_encoding')) {
   1567 									if (trim($value) == trim(substr(mb_convert_encoding($existingvalue, $ThisFileInfo['id3v1']['encoding'], $ThisFileInfo['encoding']), 0, 30))) {
   1568 										// value stored in ID3v1 appears to be probably the multibyte value transliterated (badly) into ISO-8859-1 in ID3v1.
   1569 										// As an example, Foobar2000 will do this if you tag a file with Chinese or Arabic or Cyrillic or something that doesn't fit into ISO-8859-1 the ID3v1 will consist of mostly "?" characters, one per multibyte unrepresentable character
   1570 										break 2;
   1571 									}
   1572 								}
   1573 
   1574 							} elseif (!is_array($value)) {
   1575 
   1576 								$newvaluelength = strlen(trim($value));
   1577 								foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) {
   1578 									$oldvaluelength = strlen(trim($existingvalue));
   1579 									if ((strlen($existingvalue) > 10) && ($newvaluelength > $oldvaluelength) && (substr(trim($value), 0, strlen($existingvalue)) == $existingvalue)) {
   1580 										$ThisFileInfo['comments'][$tagname][$existingkey] = trim($value);
   1581 										break;
   1582 									}
   1583 								}
   1584 
   1585 							}
   1586 							if (is_array($value) || empty($ThisFileInfo['comments'][$tagname]) || !in_array(trim($value), $ThisFileInfo['comments'][$tagname])) {
   1587 								$value = (is_string($value) ? trim($value) : $value);
   1588 								if (!is_int($key) && !ctype_digit($key)) {
   1589 									$ThisFileInfo['comments'][$tagname][$key] = $value;
   1590 								} else {
   1591 									if (!isset($ThisFileInfo['comments'][$tagname])) {
   1592 										$ThisFileInfo['comments'][$tagname] = array($value);
   1593 									} else {
   1594 										$ThisFileInfo['comments'][$tagname][] = $value;
   1595 									}
   1596 								}
   1597 							}
   1598 						}
   1599 					}
   1600 				}
   1601 			}
   1602 
   1603 			// attempt to standardize spelling of returned keys
   1604 			$StandardizeFieldNames = array(
   1605 				'tracknumber' => 'track_number',
   1606 				'track'       => 'track_number',
   1607 			);
   1608 			foreach ($StandardizeFieldNames as $badkey => $goodkey) {
   1609 				if (array_key_exists($badkey, $ThisFileInfo['comments']) && !array_key_exists($goodkey, $ThisFileInfo['comments'])) {
   1610 					$ThisFileInfo['comments'][$goodkey] = $ThisFileInfo['comments'][$badkey];
   1611 					unset($ThisFileInfo['comments'][$badkey]);
   1612 				}
   1613 			}
   1614 
   1615 			if ($option_tags_html) {
   1616 				// Copy ['comments'] to ['comments_html']
   1617 				if (!empty($ThisFileInfo['comments'])) {
   1618 					foreach ($ThisFileInfo['comments'] as $field => $values) {
   1619 						if ($field == 'picture') {
   1620 							// pictures can take up a lot of space, and we don't need multiple copies of them
   1621 							// let there be a single copy in [comments][picture], and not elsewhere
   1622 							continue;
   1623 						}
   1624 						foreach ($values as $index => $value) {
   1625 							if (is_array($value)) {
   1626 								$ThisFileInfo['comments_html'][$field][$index] = $value;
   1627 							} else {
   1628 								$ThisFileInfo['comments_html'][$field][$index] = str_replace('&#0;', '', self::MultiByteCharString2HTML($value, $ThisFileInfo['encoding']));
   1629 							}
   1630 						}
   1631 					}
   1632 				}
   1633 			}
   1634 
   1635 		}
   1636 		return true;
   1637 	}
   1638 
   1639 	/**
   1640 	 * @param string $key
   1641 	 * @param int    $begin
   1642 	 * @param int    $end
   1643 	 * @param string $file
   1644 	 * @param string $name
   1645 	 *
   1646 	 * @return string
   1647 	 */
   1648 	public static function EmbeddedLookup($key, $begin, $end, $file, $name) {
   1649 
   1650 		// Cached
   1651 		static $cache;
   1652 		if (isset($cache[$file][$name])) {
   1653 			return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');
   1654 		}
   1655 
   1656 		// Init
   1657 		$keylength  = strlen($key);
   1658 		$line_count = $end - $begin - 7;
   1659 
   1660 		// Open php file
   1661 		$fp = fopen($file, 'r');
   1662 
   1663 		// Discard $begin lines
   1664 		for ($i = 0; $i < ($begin + 3); $i++) {
   1665 			fgets($fp, 1024);
   1666 		}
   1667 
   1668 		// Loop thru line
   1669 		while (0 < $line_count--) {
   1670 
   1671 			// Read line
   1672 			$line = ltrim(fgets($fp, 1024), "\t ");
   1673 
   1674 			// METHOD A: only cache the matching key - less memory but slower on next lookup of not-previously-looked-up key
   1675 			//$keycheck = substr($line, 0, $keylength);
   1676 			//if ($key == $keycheck)  {
   1677 			//	$cache[$file][$name][$keycheck] = substr($line, $keylength + 1);
   1678 			//	break;
   1679 			//}
   1680 
   1681 			// METHOD B: cache all keys in this lookup - more memory but faster on next lookup of not-previously-looked-up key
   1682 			//$cache[$file][$name][substr($line, 0, $keylength)] = trim(substr($line, $keylength + 1));
   1683 			$explodedLine = explode("\t", $line, 2);
   1684 			$ThisKey   = (isset($explodedLine[0]) ? $explodedLine[0] : '');
   1685 			$ThisValue = (isset($explodedLine[1]) ? $explodedLine[1] : '');
   1686 			$cache[$file][$name][$ThisKey] = trim($ThisValue);
   1687 		}
   1688 
   1689 		// Close and return
   1690 		fclose($fp);
   1691 		return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');
   1692 	}
   1693 
   1694 	/**
   1695 	 * @param string $filename
   1696 	 * @param string $sourcefile
   1697 	 * @param bool   $DieOnFailure
   1698 	 *
   1699 	 * @return bool
   1700 	 * @throws Exception
   1701 	 */
   1702 	public static function IncludeDependency($filename, $sourcefile, $DieOnFailure=false) {
   1703 		global $GETID3_ERRORARRAY;
   1704 
   1705 		if (file_exists($filename)) {
   1706 			if (include_once($filename)) {
   1707 				return true;
   1708 			} else {
   1709 				$diemessage = basename($sourcefile).' depends on '.$filename.', which has errors';
   1710 			}
   1711 		} else {
   1712 			$diemessage = basename($sourcefile).' depends on '.$filename.', which is missing';
   1713 		}
   1714 		if ($DieOnFailure) {
   1715 			throw new Exception($diemessage);
   1716 		} else {
   1717 			$GETID3_ERRORARRAY[] = $diemessage;
   1718 		}
   1719 		return false;
   1720 	}
   1721 
   1722 	/**
   1723 	 * @param string $string
   1724 	 *
   1725 	 * @return string
   1726 	 */
   1727 	public static function trimNullByte($string) {
   1728 		return trim($string, "\x00");
   1729 	}
   1730 
   1731 	/**
   1732 	 * @param string $path
   1733 	 *
   1734 	 * @return float|bool
   1735 	 */
   1736 	public static function getFileSizeSyscall($path) {
   1737 		$filesize = false;
   1738 
   1739 		if (GETID3_OS_ISWINDOWS) {
   1740 			if (class_exists('COM')) { // From PHP 5.3.15 and 5.4.5, COM and DOTNET is no longer built into the php core.you have to add COM support in php.ini:
   1741 				$filesystem = new COM('Scripting.FileSystemObject');
   1742 				$file = $filesystem->GetFile($path);
   1743 				$filesize = $file->Size();
   1744 				unset($filesystem, $file);
   1745 			} else {
   1746 				$commandline = 'for %I in ('.escapeshellarg($path).') do @echo %~zI';
   1747 			}
   1748 		} else {
   1749 			$commandline = 'ls -l '.escapeshellarg($path).' | awk \'{print $5}\'';
   1750 		}
   1751 		if (isset($commandline)) {
   1752 			$output = trim(`$commandline`);
   1753 			if (ctype_digit($output)) {
   1754 				$filesize = (float) $output;
   1755 			}
   1756 		}
   1757 		return $filesize;
   1758 	}
   1759 
   1760 	/**
   1761 	 * @param string $filename
   1762 	 *
   1763 	 * @return string|false
   1764 	 */
   1765 	public static function truepath($filename) {
   1766 		// 2017-11-08: this could use some improvement, patches welcome
   1767 		if (preg_match('#^(\\\\\\\\|//)[a-z0-9]#i', $filename, $matches)) {
   1768 			// PHP's built-in realpath function does not work on UNC Windows shares
   1769 			$goodpath = array();
   1770 			foreach (explode('/', str_replace('\\', '/', $filename)) as $part) {
   1771 				if ($part == '.') {
   1772 					continue;
   1773 				}
   1774 				if ($part == '..') {
   1775 					if (count($goodpath)) {
   1776 						array_pop($goodpath);
   1777 					} else {
   1778 						// cannot step above this level, already at top level
   1779 						return false;
   1780 					}
   1781 				} else {
   1782 					$goodpath[] = $part;
   1783 				}
   1784 			}
   1785 			return implode(DIRECTORY_SEPARATOR, $goodpath);
   1786 		}
   1787 		return realpath($filename);
   1788 	}
   1789 
   1790 	/**
   1791 	 * Workaround for Bug #37268 (https://bugs.php.net/bug.php?id=37268)
   1792 	 *
   1793 	 * @param string $path A path.
   1794 	 * @param string $suffix If the name component ends in suffix this will also be cut off.
   1795 	 *
   1796 	 * @return string
   1797 	 */
   1798 	public static function mb_basename($path, $suffix = null) {
   1799 		$splited = preg_split('#/#', rtrim($path, '/ '));
   1800 		return substr(basename('X'.$splited[count($splited) - 1], $suffix), 1);
   1801 	}
   1802 
   1803 }
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