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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 if (!defined('GETID3_LIBXML_OPTIONS') && defined('LIBXML_VERSION')) { 15 if (LIBXML_VERSION >= 20621) { 16 define('GETID3_LIBXML_OPTIONS', LIBXML_NONET | LIBXML_NOWARNING | LIBXML_COMPACT); 17 } else { 18 define('GETID3_LIBXML_OPTIONS', LIBXML_NONET | LIBXML_NOWARNING); 19 } 20 } 21 22 // Available since PHP 7.0 (2015-Dec-03 https://www.php.net/ChangeLog-7.php) 23 if (!defined('PHP_INT_MIN')) { 24 define('PHP_INT_MIN', ~PHP_INT_MAX); 25 } 26 27 class getid3_lib 28 { 29 /** 30 * @param string $string 31 * @param bool $hex 32 * @param bool $spaces 33 * @param string|bool $htmlencoding 34 * 35 * @return string 36 */ 37 public static function PrintHexBytes($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 boolean 52 } 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 $floatnumber 62 * 63 * @return float|int returns int (if possible, otherwise float) 64 */ 65 public static function trunc($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 $variable 81 * @param-out int $variable 82 * @param int $increment 83 * 84 * @return bool 85 */ 86 public static function safe_inc(&$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 $floatnum 97 * 98 * @return int|float 99 */ 100 public static function CastAsInt($floatnum) { 101 // convert to float if not already 102 $floatnum = (float) $floatnum; 103 104 // convert a float to type int, only if possible 105 if (self::trunc($floatnum) == $floatnum) { 106 // it's not floating point 107 if (self::intValueSupported($floatnum)) { 108 // it's within int range 109 $floatnum = (int) $floatnum; 110 } 111 } 112 return $floatnum; 113 } 114 115 /** 116 * @param int $num 117 * 118 * @return bool 119 */ 120 public static function intValueSupported($num) { 121 // really should be <= and >= but trying "(int)9.2233720368548E+18" results in PHP warning "The float 9.2233720368548E+18 is not representable as an int, cast occurred" 122 return (($num < PHP_INT_MAX) && ($num > PHP_INT_MIN)); 123 } 124 125 /** 126 * Perform a division, guarding against division by zero 127 * 128 * @param float|int $numerator 129 * @param float|int $denominator 130 * @param float|int $fallback 131 * @return float|int 132 */ 133 public static function SafeDiv($numerator, $denominator, $fallback = 0) { 134 return $denominator ? $numerator / $denominator : $fallback; 135 } 136 137 /** 138 * @param string $fraction 139 * 140 * @return float 141 */ 142 public static function DecimalizeFraction($fraction) { 143 list($numerator, $denominator) = explode('/', $fraction); 144 return (int) $numerator / ($denominator ? $denominator : 1); 145 } 146 147 /** 148 * @param string $binarynumerator 149 * 150 * @return float 151 */ 152 public static function DecimalBinary2Float($binarynumerator) { 153 $numerator = self::Bin2Dec($binarynumerator); 154 $denominator = self::Bin2Dec('1'.str_repeat('0', strlen($binarynumerator))); 155 return ($numerator / $denominator); 156 } 157 158 /** 159 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html 160 * 161 * @param string $binarypointnumber 162 * @param int $maxbits 163 * 164 * @return array 165 */ 166 public static function NormalizeBinaryPoint($binarypointnumber, $maxbits=52) { 167 if (strpos($binarypointnumber, '.') === false) { 168 $binarypointnumber = '0.'.$binarypointnumber; 169 } elseif ($binarypointnumber[0] == '.') { 170 $binarypointnumber = '0'.$binarypointnumber; 171 } 172 $exponent = 0; 173 while (($binarypointnumber[0] != '1') || (substr($binarypointnumber, 1, 1) != '.')) { 174 if (substr($binarypointnumber, 1, 1) == '.') { 175 $exponent--; 176 $binarypointnumber = substr($binarypointnumber, 2, 1).'.'.substr($binarypointnumber, 3); 177 } else { 178 $pointpos = strpos($binarypointnumber, '.'); 179 $exponent += ($pointpos - 1); 180 $binarypointnumber = str_replace('.', '', $binarypointnumber); 181 $binarypointnumber = $binarypointnumber[0].'.'.substr($binarypointnumber, 1); 182 } 183 } 184 $binarypointnumber = str_pad(substr($binarypointnumber, 0, $maxbits + 2), $maxbits + 2, '0', STR_PAD_RIGHT); 185 return array('normalized'=>$binarypointnumber, 'exponent'=>(int) $exponent); 186 } 187 188 /** 189 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html 190 * 191 * @param float $floatvalue 192 * 193 * @return string 194 */ 195 public static function Float2BinaryDecimal($floatvalue) { 196 $maxbits = 128; // to how many bits of precision should the calculations be taken? 197 $intpart = self::trunc($floatvalue); 198 $floatpart = abs($floatvalue - $intpart); 199 $pointbitstring = ''; 200 while (($floatpart != 0) && (strlen($pointbitstring) < $maxbits)) { 201 $floatpart *= 2; 202 $pointbitstring .= (string) self::trunc($floatpart); 203 $floatpart -= self::trunc($floatpart); 204 } 205 $binarypointnumber = decbin($intpart).'.'.$pointbitstring; 206 return $binarypointnumber; 207 } 208 209 /** 210 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html 211 * 212 * @param float $floatvalue 213 * @param int $bits 214 * 215 * @return string|false 216 */ 217 public static function Float2String($floatvalue, $bits) { 218 $exponentbits = 0; 219 $fractionbits = 0; 220 switch ($bits) { 221 case 32: 222 $exponentbits = 8; 223 $fractionbits = 23; 224 break; 225 226 case 64: 227 $exponentbits = 11; 228 $fractionbits = 52; 229 break; 230 231 default: 232 return false; 233 } 234 if ($floatvalue >= 0) { 235 $signbit = '0'; 236 } else { 237 $signbit = '1'; 238 } 239 $normalizedbinary = self::NormalizeBinaryPoint(self::Float2BinaryDecimal($floatvalue), $fractionbits); 240 $biasedexponent = pow(2, $exponentbits - 1) - 1 + $normalizedbinary['exponent']; // (127 or 1023) +/- exponent 241 $exponentbitstring = str_pad(decbin($biasedexponent), $exponentbits, '0', STR_PAD_LEFT); 242 $fractionbitstring = str_pad(substr($normalizedbinary['normalized'], 2), $fractionbits, '0', STR_PAD_RIGHT); 243 244 return self::BigEndian2String(self::Bin2Dec($signbit.$exponentbitstring.$fractionbitstring), $bits % 8, false); 245 } 246 247 /** 248 * @param string $byteword 249 * 250 * @return float|false 251 */ 252 public static function LittleEndian2Float($byteword) { 253 return self::BigEndian2Float(strrev($byteword)); 254 } 255 256 /** 257 * ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic 258 * 259 * @link https://web.archive.org/web/20120325162206/http://www.psc.edu/general/software/packages/ieee/ieee.php 260 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html 261 * 262 * @param string $byteword 263 * 264 * @return float|false 265 */ 266 public static function BigEndian2Float($byteword) { 267 $bitword = self::BigEndian2Bin($byteword); 268 if (!$bitword) { 269 return 0; 270 } 271 $signbit = $bitword[0]; 272 $floatvalue = 0; 273 $exponentbits = 0; 274 $fractionbits = 0; 275 276 switch (strlen($byteword) * 8) { 277 case 32: 278 $exponentbits = 8; 279 $fractionbits = 23; 280 break; 281 282 case 64: 283 $exponentbits = 11; 284 $fractionbits = 52; 285 break; 286 287 case 80: 288 // 80-bit Apple SANE format 289 // http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/ 290 $exponentstring = substr($bitword, 1, 15); 291 $isnormalized = intval($bitword[16]); 292 $fractionstring = substr($bitword, 17, 63); 293 $exponent = pow(2, self::Bin2Dec($exponentstring) - 16383); 294 $fraction = $isnormalized + self::DecimalBinary2Float($fractionstring); 295 $floatvalue = $exponent * $fraction; 296 if ($signbit == '1') { 297 $floatvalue *= -1; 298 } 299 return $floatvalue; 300 301 default: 302 return false; 303 } 304 $exponentstring = substr($bitword, 1, $exponentbits); 305 $fractionstring = substr($bitword, $exponentbits + 1, $fractionbits); 306 $exponent = self::Bin2Dec($exponentstring); 307 $fraction = self::Bin2Dec($fractionstring); 308 309 if (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction != 0)) { 310 // Not a Number 311 $floatvalue = NAN; 312 } elseif (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction == 0)) { 313 if ($signbit == '1') { 314 $floatvalue = -INF; 315 } else { 316 $floatvalue = INF; 317 } 318 } elseif (($exponent == 0) && ($fraction == 0)) { 319 if ($signbit == '1') { 320 $floatvalue = -0.0; 321 } else { 322 $floatvalue = 0.0; 323 } 324 } elseif (($exponent == 0) && ($fraction != 0)) { 325 // These are 'unnormalized' values 326 $floatvalue = pow(2, (-1 * (pow(2, $exponentbits - 1) - 2))) * self::DecimalBinary2Float($fractionstring); 327 if ($signbit == '1') { 328 $floatvalue *= -1; 329 } 330 } elseif ($exponent != 0) { 331 $floatvalue = pow(2, ($exponent - (pow(2, $exponentbits - 1) - 1))) * (1 + self::DecimalBinary2Float($fractionstring)); 332 if ($signbit == '1') { 333 $floatvalue *= -1; 334 } 335 } 336 return (float) $floatvalue; 337 } 338 339 /** 340 * @param string $byteword 341 * @param bool $synchsafe 342 * @param bool $signed 343 * 344 * @return int|float|false 345 * @throws Exception 346 */ 347 public static function BigEndian2Int($byteword, $synchsafe=false, $signed=false) { 348 $intvalue = 0; 349 $bytewordlen = strlen($byteword); 350 if ($bytewordlen == 0) { 351 return false; 352 } 353 for ($i = 0; $i < $bytewordlen; $i++) { 354 if ($synchsafe) { // disregard MSB, effectively 7-bit bytes 355 //$intvalue = $intvalue | (ord($byteword{$i}) & 0x7F) << (($bytewordlen - 1 - $i) * 7); // faster, but runs into problems past 2^31 on 32-bit systems 356 $intvalue += (ord($byteword[$i]) & 0x7F) * pow(2, ($bytewordlen - 1 - $i) * 7); 357 } else { 358 $intvalue += ord($byteword[$i]) * pow(256, ($bytewordlen - 1 - $i)); 359 } 360 } 361 if ($signed && !$synchsafe) { 362 // synchsafe ints are not allowed to be signed 363 if ($bytewordlen <= PHP_INT_SIZE) { 364 $signMaskBit = 0x80 << (8 * ($bytewordlen - 1)); 365 if ($intvalue & $signMaskBit) { 366 $intvalue = 0 - ($intvalue & ($signMaskBit - 1)); 367 } 368 } else { 369 throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits ('.strlen($byteword).') in self::BigEndian2Int()'); 370 } 371 } 372 return self::CastAsInt($intvalue); 373 } 374 375 /** 376 * @param string $byteword 377 * @param bool $signed 378 * 379 * @return int|float|false 380 */ 381 public static function LittleEndian2Int($byteword, $signed=false) { 382 return self::BigEndian2Int(strrev($byteword), false, $signed); 383 } 384 385 /** 386 * @param string $byteword 387 * 388 * @return string 389 */ 390 public static function LittleEndian2Bin($byteword) { 391 return self::BigEndian2Bin(strrev($byteword)); 392 } 393 394 /** 395 * @param string $byteword 396 * 397 * @return string 398 */ 399 public static function BigEndian2Bin($byteword) { 400 $binvalue = ''; 401 $bytewordlen = strlen($byteword); 402 for ($i = 0; $i < $bytewordlen; $i++) { 403 $binvalue .= str_pad(decbin(ord($byteword[$i])), 8, '0', STR_PAD_LEFT); 404 } 405 return $binvalue; 406 } 407 408 /** 409 * @param int $number 410 * @param int $minbytes 411 * @param bool $synchsafe 412 * @param bool $signed 413 * 414 * @return string 415 * @throws Exception 416 */ 417 public static function BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false) { 418 if ($number < 0) { 419 throw new Exception('ERROR: self::BigEndian2String() does not support negative numbers'); 420 } 421 $maskbyte = (($synchsafe || $signed) ? 0x7F : 0xFF); 422 $intstring = ''; 423 if ($signed) { 424 if ($minbytes > PHP_INT_SIZE) { 425 throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits in self::BigEndian2String()'); 426 } 427 $number = $number & (0x80 << (8 * ($minbytes - 1))); 428 } 429 while ($number != 0) { 430 $quotient = ($number / ($maskbyte + 1)); 431 $intstring = chr(ceil(($quotient - floor($quotient)) * $maskbyte)).$intstring; 432 $number = floor($quotient); 433 } 434 return str_pad($intstring, $minbytes, "\x00", STR_PAD_LEFT); 435 } 436 437 /** 438 * @param int|string $number 439 * 440 * @return string 441 */ 442 public static function Dec2Bin($number) { 443 if (!is_numeric($number)) { 444 // https://github.com/JamesHeinrich/getID3/issues/299 445 trigger_error('TypeError: Dec2Bin(): Argument #1 ($number) must be numeric, '.gettype($number).' given', E_USER_WARNING); 446 return ''; 447 } 448 $bytes = array(); 449 while ($number >= 256) { 450 $bytes[] = (int) (($number / 256) - (floor($number / 256))) * 256; 451 $number = floor($number / 256); 452 } 453 $bytes[] = (int) $number; 454 $binstring = ''; 455 foreach ($bytes as $i => $byte) { 456 $binstring = (($i == count($bytes) - 1) ? decbin($byte) : str_pad(decbin($byte), 8, '0', STR_PAD_LEFT)).$binstring; 457 } 458 return $binstring; 459 } 460 461 /** 462 * @param string $binstring 463 * @param bool $signed 464 * 465 * @return int|float 466 */ 467 public static function Bin2Dec($binstring, $signed=false) { 468 $signmult = 1; 469 if ($signed) { 470 if ($binstring[0] == '1') { 471 $signmult = -1; 472 } 473 $binstring = substr($binstring, 1); 474 } 475 $decvalue = 0; 476 for ($i = 0; $i < strlen($binstring); $i++) { 477 $decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i); 478 } 479 return self::CastAsInt($decvalue * $signmult); 480 } 481 482 /** 483 * @param string $binstring 484 * 485 * @return string 486 */ 487 public static function Bin2String($binstring) { 488 // return 'hi' for input of '0110100001101001' 489 $string = ''; 490 $binstringreversed = strrev($binstring); 491 for ($i = 0; $i < strlen($binstringreversed); $i += 8) { 492 $string = chr(self::Bin2Dec(strrev(substr($binstringreversed, $i, 8)))).$string; 493 } 494 return $string; 495 } 496 497 /** 498 * @param int $number 499 * @param int $minbytes 500 * @param bool $synchsafe 501 * 502 * @return string 503 */ 504 public static function LittleEndian2String($number, $minbytes=1, $synchsafe=false) { 505 $intstring = ''; 506 while ($number > 0) { 507 if ($synchsafe) { 508 $intstring = $intstring.chr($number & 127); 509 $number >>= 7; 510 } else { 511 $intstring = $intstring.chr($number & 255); 512 $number >>= 8; 513 } 514 } 515 return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT); 516 } 517 518 /** 519 * @param mixed $array1 520 * @param mixed $array2 521 * 522 * @return array|false 523 */ 524 public static function array_merge_clobber($array1, $array2) { 525 // written by kcØhireability*com 526 // taken from http://www.php.net/manual/en/function.array-merge-recursive.php 527 if (!is_array($array1) || !is_array($array2)) { 528 return false; 529 } 530 $newarray = $array1; 531 foreach ($array2 as $key => $val) { 532 if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) { 533 $newarray[$key] = self::array_merge_clobber($newarray[$key], $val); 534 } else { 535 $newarray[$key] = $val; 536 } 537 } 538 return $newarray; 539 } 540 541 /** 542 * @param mixed $array1 543 * @param mixed $array2 544 * 545 * @return array|false 546 */ 547 public static function array_merge_noclobber($array1, $array2) { 548 if (!is_array($array1) || !is_array($array2)) { 549 return false; 550 } 551 $newarray = $array1; 552 foreach ($array2 as $key => $val) { 553 if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) { 554 $newarray[$key] = self::array_merge_noclobber($newarray[$key], $val); 555 } elseif (!isset($newarray[$key])) { 556 $newarray[$key] = $val; 557 } 558 } 559 return $newarray; 560 } 561 562 /** 563 * @param mixed $array1 564 * @param mixed $array2 565 * 566 * @return array|false|null 567 */ 568 public static function flipped_array_merge_noclobber($array1, $array2) { 569 if (!is_array($array1) || !is_array($array2)) { 570 return false; 571 } 572 # naturally, this only works non-recursively 573 $newarray = array_flip($array1); 574 foreach (array_flip($array2) as $key => $val) { 575 if (!isset($newarray[$key])) { 576 $newarray[$key] = count($newarray); 577 } 578 } 579 return array_flip($newarray); 580 } 581 582 /** 583 * @param array $theArray 584 * 585 * @return bool 586 */ 587 public static function ksort_recursive(&$theArray) { 588 ksort($theArray); 589 foreach ($theArray as $key => $value) { 590 if (is_array($value)) { 591 self::ksort_recursive($theArray[$key]); 592 } 593 } 594 return true; 595 } 596 597 /** 598 * @param string $filename 599 * @param int $numextensions 600 * 601 * @return string 602 */ 603 public static function fileextension($filename, $numextensions=1) { 604 if (strstr($filename, '.')) { 605 $reversedfilename = strrev($filename); 606 $offset = 0; 607 for ($i = 0; $i < $numextensions; $i++) { 608 $offset = strpos($reversedfilename, '.', $offset + 1); 609 if ($offset === false) { 610 return ''; 611 } 612 } 613 return strrev(substr($reversedfilename, 0, $offset)); 614 } 615 return ''; 616 } 617 618 /** 619 * @param int $seconds 620 * 621 * @return string 622 */ 623 public static function PlaytimeString($seconds) { 624 $sign = (($seconds < 0) ? '-' : ''); 625 $seconds = round(abs($seconds)); 626 $H = (int) floor( $seconds / 3600); 627 $M = (int) floor(($seconds - (3600 * $H) ) / 60); 628 $S = (int) round( $seconds - (3600 * $H) - (60 * $M) ); 629 return $sign.($H ? $H.':' : '').($H ? str_pad($M, 2, '0', STR_PAD_LEFT) : intval($M)).':'.str_pad($S, 2, 0, STR_PAD_LEFT); 630 } 631 632 /** 633 * @param int $macdate 634 * 635 * @return int|float 636 */ 637 public static function DateMac2Unix($macdate) { 638 // Macintosh timestamp: seconds since 00:00h January 1, 1904 639 // UNIX timestamp: seconds since 00:00h January 1, 1970 640 return self::CastAsInt($macdate - 2082844800); 641 } 642 643 /** 644 * @param string $rawdata 645 * 646 * @return float 647 */ 648 public static function FixedPoint8_8($rawdata) { 649 return self::BigEndian2Int(substr($rawdata, 0, 1)) + (float) (self::BigEndian2Int(substr($rawdata, 1, 1)) / pow(2, 8)); 650 } 651 652 /** 653 * @param string $rawdata 654 * 655 * @return float 656 */ 657 public static function FixedPoint16_16($rawdata) { 658 return self::BigEndian2Int(substr($rawdata, 0, 2)) + (float) (self::BigEndian2Int(substr($rawdata, 2, 2)) / pow(2, 16)); 659 } 660 661 /** 662 * @param string $rawdata 663 * 664 * @return float 665 */ 666 public static function FixedPoint2_30($rawdata) { 667 $binarystring = self::BigEndian2Bin($rawdata); 668 return self::Bin2Dec(substr($binarystring, 0, 2)) + (float) (self::Bin2Dec(substr($binarystring, 2, 30)) / pow(2, 30)); 669 } 670 671 672 /** 673 * @param string $ArrayPath 674 * @param string $Separator 675 * @param mixed $Value 676 * 677 * @return array 678 */ 679 public static function CreateDeepArray($ArrayPath, $Separator, $Value) { 680 // assigns $Value to a nested array path: 681 // $foo = self::CreateDeepArray('/path/to/my', '/', 'file.txt') 682 // is the same as: 683 // $foo = array('path'=>array('to'=>'array('my'=>array('file.txt')))); 684 // or 685 // $foo['path']['to']['my'] = 'file.txt'; 686 $ArrayPath = ltrim($ArrayPath, $Separator); 687 $ReturnedArray = array(); 688 if (($pos = strpos($ArrayPath, $Separator)) !== false) { 689 $ReturnedArray[substr($ArrayPath, 0, $pos)] = self::CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value); 690 } else { 691 $ReturnedArray[$ArrayPath] = $Value; 692 } 693 return $ReturnedArray; 694 } 695 696 /** 697 * @param array $arraydata 698 * @param bool $returnkey 699 * 700 * @return int|false 701 */ 702 public static function array_max($arraydata, $returnkey=false) { 703 $maxvalue = false; 704 $maxkey = false; 705 foreach ($arraydata as $key => $value) { 706 if (!is_array($value)) { 707 if (($maxvalue === false) || ($value > $maxvalue)) { 708 $maxvalue = $value; 709 $maxkey = $key; 710 } 711 } 712 } 713 return ($returnkey ? $maxkey : $maxvalue); 714 } 715 716 /** 717 * @param array $arraydata 718 * @param bool $returnkey 719 * 720 * @return int|false 721 */ 722 public static function array_min($arraydata, $returnkey=false) { 723 $minvalue = false; 724 $minkey = false; 725 foreach ($arraydata as $key => $value) { 726 if (!is_array($value)) { 727 if (($minvalue === false) || ($value < $minvalue)) { 728 $minvalue = $value; 729 $minkey = $key; 730 } 731 } 732 } 733 return ($returnkey ? $minkey : $minvalue); 734 } 735 736 /** 737 * @param string $XMLstring 738 * 739 * @return array|false 740 */ 741 public static function XML2array($XMLstring) { 742 if (function_exists('simplexml_load_string')) { 743 if (PHP_VERSION_ID < 80000) { 744 if (function_exists('libxml_disable_entity_loader')) { 745 // http://websec.io/2012/08/27/Preventing-XEE-in-PHP.html 746 // https://core.trac.wordpress.org/changeset/29378 747 // This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading is 748 // disabled by default, but is still needed when LIBXML_NOENT is used. 749 $loader = libxml_disable_entity_loader(true); 750 if ($loader === false && !libxml_disable_entity_loader(true)) { 751 // Failed to disable external entity loading — refuse to parse to prevent XXE 752 return false; 753 } 754 $XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS); 755 $return = self::SimpleXMLelement2array($XMLobject); 756 libxml_disable_entity_loader($loader); 757 return $return; 758 } 759 } else { 760 $allow = false; 761 if (defined('LIBXML_VERSION') && (LIBXML_VERSION >= 20900)) { 762 // https://www.php.net/manual/en/function.libxml-disable-entity-loader.php 763 // "as of libxml 2.9.0 entity substitution is disabled by default, so there is no need to disable the loading 764 // of external entities, unless there is the need to resolve internal entity references with LIBXML_NOENT." 765 $allow = true; 766 } elseif (function_exists('libxml_set_external_entity_loader')) { 767 libxml_set_external_entity_loader(function () { return null; }); // https://www.zend.com/blog/cve-2023-3823 768 $allow = true; 769 } 770 if ($allow) { 771 $XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS); 772 $return = self::SimpleXMLelement2array($XMLobject); 773 return $return; 774 } 775 } 776 } 777 return false; 778 } 779 780 /** 781 * @param SimpleXMLElement|array|mixed $XMLobject 782 * 783 * @return mixed 784 */ 785 public static function SimpleXMLelement2array($XMLobject) { 786 if (!is_object($XMLobject) && !is_array($XMLobject)) { 787 return $XMLobject; 788 } 789 $XMLarray = $XMLobject instanceof SimpleXMLElement ? get_object_vars($XMLobject) : $XMLobject; 790 foreach ($XMLarray as $key => $value) { 791 $XMLarray[$key] = self::SimpleXMLelement2array($value); 792 } 793 return $XMLarray; 794 } 795 796 /** 797 * Returns checksum for a file from starting position to absolute end position. 798 * 799 * @param string $file 800 * @param int $offset 801 * @param int $end 802 * @param string $algorithm 803 * 804 * @return string|false 805 * @throws getid3_exception 806 */ 807 public static function hash_data($file, $offset, $end, $algorithm) { 808 if (!self::intValueSupported($end)) { 809 return false; 810 } 811 if (!in_array($algorithm, array('md5', 'sha1'))) { 812 throw new getid3_exception('Invalid algorithm ('.$algorithm.') in self::hash_data()'); 813 } 814 815 $size = $end - $offset; 816 817 $fp = fopen($file, 'rb'); 818 fseek($fp, $offset); 819 $ctx = hash_init($algorithm); 820 while ($size > 0) { 821 $buffer = fread($fp, min($size, getID3::FREAD_BUFFER_SIZE)); 822 hash_update($ctx, $buffer); 823 $size -= getID3::FREAD_BUFFER_SIZE; 824 } 825 $hash = hash_final($ctx); 826 fclose($fp); 827 828 return $hash; 829 } 830 831 /** 832 * @param string $filename_source 833 * @param string $filename_dest 834 * @param int $offset 835 * @param int $length 836 * 837 * @return bool 838 * @throws Exception 839 * 840 * @deprecated Unused, may be removed in future versions of getID3 841 */ 842 public static function CopyFileParts($filename_source, $filename_dest, $offset, $length) { 843 if (!self::intValueSupported($offset + $length)) { 844 throw new Exception('cannot copy file portion, it extends beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit'); 845 } 846 if (is_readable($filename_source) && is_file($filename_source) && ($fp_src = fopen($filename_source, 'rb'))) { 847 if (($fp_dest = fopen($filename_dest, 'wb'))) { 848 if (fseek($fp_src, $offset) == 0) { 849 $byteslefttowrite = $length; 850 while (($byteslefttowrite > 0) && ($buffer = fread($fp_src, min($byteslefttowrite, getID3::FREAD_BUFFER_SIZE)))) { 851 $byteswritten = fwrite($fp_dest, $buffer, $byteslefttowrite); 852 $byteslefttowrite -= $byteswritten; 853 } 854 fclose($fp_dest); 855 return true; 856 } else { 857 fclose($fp_src); 858 throw new Exception('failed to seek to offset '.$offset.' in '.$filename_source); 859 } 860 } else { 861 throw new Exception('failed to create file for writing '.$filename_dest); 862 } 863 } else { 864 throw new Exception('failed to open file for reading '.$filename_source); 865 } 866 } 867 868 /** 869 * @param int $charval 870 * 871 * @return string 872 */ 873 public static function iconv_fallback_int_utf8($charval) { 874 if ($charval < 128) { 875 // 0bbbbbbb 876 $newcharstring = chr($charval); 877 } elseif ($charval < 2048) { 878 // 110bbbbb 10bbbbbb 879 $newcharstring = chr(($charval >> 6) | 0xC0); 880 $newcharstring .= chr(($charval & 0x3F) | 0x80); 881 } elseif ($charval < 65536) { 882 // 1110bbbb 10bbbbbb 10bbbbbb 883 $newcharstring = chr(($charval >> 12) | 0xE0); 884 $newcharstring .= chr(($charval >> 6) | 0xC0); 885 $newcharstring .= chr(($charval & 0x3F) | 0x80); 886 } else { 887 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 888 $newcharstring = chr(($charval >> 18) | 0xF0); 889 $newcharstring .= chr(($charval >> 12) | 0xC0); 890 $newcharstring .= chr(($charval >> 6) | 0xC0); 891 $newcharstring .= chr(($charval & 0x3F) | 0x80); 892 } 893 return $newcharstring; 894 } 895 896 /** 897 * ISO-8859-1 => UTF-8 898 * 899 * @param string $string 900 * @param bool $bom 901 * 902 * @return string 903 */ 904 public static function iconv_fallback_iso88591_utf8($string, $bom=false) { 905 $newcharstring = ''; 906 if ($bom) { 907 $newcharstring .= "\xEF\xBB\xBF"; 908 } 909 for ($i = 0; $i < strlen($string); $i++) { 910 $charval = ord($string[$i]); 911 $newcharstring .= self::iconv_fallback_int_utf8($charval); 912 } 913 return $newcharstring; 914 } 915 916 /** 917 * ISO-8859-1 => UTF-16BE 918 * 919 * @param string $string 920 * @param bool $bom 921 * 922 * @return string 923 */ 924 public static function iconv_fallback_iso88591_utf16be($string, $bom=false) { 925 $newcharstring = ''; 926 if ($bom) { 927 $newcharstring .= "\xFE\xFF"; 928 } 929 for ($i = 0; $i < strlen($string); $i++) { 930 $newcharstring .= "\x00".$string[$i]; 931 } 932 return $newcharstring; 933 } 934 935 /** 936 * ISO-8859-1 => UTF-16LE 937 * 938 * @param string $string 939 * @param bool $bom 940 * 941 * @return string 942 */ 943 public static function iconv_fallback_iso88591_utf16le($string, $bom=false) { 944 $newcharstring = ''; 945 if ($bom) { 946 $newcharstring .= "\xFF\xFE"; 947 } 948 for ($i = 0; $i < strlen($string); $i++) { 949 $newcharstring .= $string[$i]."\x00"; 950 } 951 return $newcharstring; 952 } 953 954 /** 955 * ISO-8859-1 => UTF-16LE (BOM) 956 * 957 * @param string $string 958 * 959 * @return string 960 */ 961 public static function iconv_fallback_iso88591_utf16($string) { 962 return self::iconv_fallback_iso88591_utf16le($string, true); 963 } 964 965 /** 966 * UTF-8 => ISO-8859-1 967 * 968 * @param string $string 969 * 970 * @return string 971 */ 972 public static function iconv_fallback_utf8_iso88591($string) { 973 $newcharstring = ''; 974 $offset = 0; 975 $stringlength = strlen($string); 976 while ($offset < $stringlength) { 977 if ((ord($string[$offset]) | 0x07) == 0xF7) { 978 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 979 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 980 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 981 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 982 (ord($string[($offset + 3)]) & 0x3F); 983 $offset += 4; 984 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 985 // 1110bbbb 10bbbbbb 10bbbbbb 986 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 987 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 988 (ord($string[($offset + 2)]) & 0x3F); 989 $offset += 3; 990 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 991 // 110bbbbb 10bbbbbb 992 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 993 (ord($string[($offset + 1)]) & 0x3F); 994 $offset += 2; 995 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 996 // 0bbbbbbb 997 $charval = ord($string[$offset]); 998 $offset += 1; 999 } else { 1000 // error? throw some kind of warning here? 1001 $charval = false; 1002 $offset += 1; 1003 } 1004 if ($charval !== false) { 1005 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1006 } 1007 } 1008 return $newcharstring; 1009 } 1010 1011 /** 1012 * UTF-8 => UTF-16BE 1013 * 1014 * @param string $string 1015 * @param bool $bom 1016 * 1017 * @return string 1018 */ 1019 public static function iconv_fallback_utf8_utf16be($string, $bom=false) { 1020 $newcharstring = ''; 1021 if ($bom) { 1022 $newcharstring .= "\xFE\xFF"; 1023 } 1024 $offset = 0; 1025 $stringlength = strlen($string); 1026 while ($offset < $stringlength) { 1027 if ((ord($string[$offset]) | 0x07) == 0xF7) { 1028 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 1029 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 1030 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 1031 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 1032 (ord($string[($offset + 3)]) & 0x3F); 1033 $offset += 4; 1034 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 1035 // 1110bbbb 10bbbbbb 10bbbbbb 1036 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 1037 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 1038 (ord($string[($offset + 2)]) & 0x3F); 1039 $offset += 3; 1040 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 1041 // 110bbbbb 10bbbbbb 1042 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 1043 (ord($string[($offset + 1)]) & 0x3F); 1044 $offset += 2; 1045 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 1046 // 0bbbbbbb 1047 $charval = ord($string[$offset]); 1048 $offset += 1; 1049 } else { 1050 // error? throw some kind of warning here? 1051 $charval = false; 1052 $offset += 1; 1053 } 1054 if ($charval !== false) { 1055 $newcharstring .= (($charval < 65536) ? self::BigEndian2String($charval, 2) : "\x00".'?'); 1056 } 1057 } 1058 return $newcharstring; 1059 } 1060 1061 /** 1062 * UTF-8 => UTF-16LE 1063 * 1064 * @param string $string 1065 * @param bool $bom 1066 * 1067 * @return string 1068 */ 1069 public static function iconv_fallback_utf8_utf16le($string, $bom=false) { 1070 $newcharstring = ''; 1071 if ($bom) { 1072 $newcharstring .= "\xFF\xFE"; 1073 } 1074 $offset = 0; 1075 $stringlength = strlen($string); 1076 while ($offset < $stringlength) { 1077 if ((ord($string[$offset]) | 0x07) == 0xF7) { 1078 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 1079 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 1080 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 1081 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 1082 (ord($string[($offset + 3)]) & 0x3F); 1083 $offset += 4; 1084 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 1085 // 1110bbbb 10bbbbbb 10bbbbbb 1086 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 1087 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 1088 (ord($string[($offset + 2)]) & 0x3F); 1089 $offset += 3; 1090 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 1091 // 110bbbbb 10bbbbbb 1092 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 1093 (ord($string[($offset + 1)]) & 0x3F); 1094 $offset += 2; 1095 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 1096 // 0bbbbbbb 1097 $charval = ord($string[$offset]); 1098 $offset += 1; 1099 } else { 1100 // error? maybe throw some warning here? 1101 $charval = false; 1102 $offset += 1; 1103 } 1104 if ($charval !== false) { 1105 $newcharstring .= (($charval < 65536) ? self::LittleEndian2String($charval, 2) : '?'."\x00"); 1106 } 1107 } 1108 return $newcharstring; 1109 } 1110 1111 /** 1112 * UTF-8 => UTF-16LE (BOM) 1113 * 1114 * @param string $string 1115 * 1116 * @return string 1117 */ 1118 public static function iconv_fallback_utf8_utf16($string) { 1119 return self::iconv_fallback_utf8_utf16le($string, true); 1120 } 1121 1122 /** 1123 * UTF-16BE => UTF-8 1124 * 1125 * @param string $string 1126 * 1127 * @return string 1128 */ 1129 public static function iconv_fallback_utf16be_utf8($string) { 1130 if (substr($string, 0, 2) == "\xFE\xFF") { 1131 // strip BOM 1132 $string = substr($string, 2); 1133 } 1134 $newcharstring = ''; 1135 for ($i = 0; $i < strlen($string); $i += 2) { 1136 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1137 $newcharstring .= self::iconv_fallback_int_utf8($charval); 1138 } 1139 return $newcharstring; 1140 } 1141 1142 /** 1143 * UTF-16LE => UTF-8 1144 * 1145 * @param string $string 1146 * 1147 * @return string 1148 */ 1149 public static function iconv_fallback_utf16le_utf8($string) { 1150 if (substr($string, 0, 2) == "\xFF\xFE") { 1151 // strip BOM 1152 $string = substr($string, 2); 1153 } 1154 $newcharstring = ''; 1155 for ($i = 0; $i < strlen($string); $i += 2) { 1156 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1157 $newcharstring .= self::iconv_fallback_int_utf8($charval); 1158 } 1159 return $newcharstring; 1160 } 1161 1162 /** 1163 * UTF-16BE => ISO-8859-1 1164 * 1165 * @param string $string 1166 * 1167 * @return string 1168 */ 1169 public static function iconv_fallback_utf16be_iso88591($string) { 1170 if (substr($string, 0, 2) == "\xFE\xFF") { 1171 // strip BOM 1172 $string = substr($string, 2); 1173 } 1174 $newcharstring = ''; 1175 for ($i = 0; $i < strlen($string); $i += 2) { 1176 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1177 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1178 } 1179 return $newcharstring; 1180 } 1181 1182 /** 1183 * UTF-16LE => ISO-8859-1 1184 * 1185 * @param string $string 1186 * 1187 * @return string 1188 */ 1189 public static function iconv_fallback_utf16le_iso88591($string) { 1190 if (substr($string, 0, 2) == "\xFF\xFE") { 1191 // strip BOM 1192 $string = substr($string, 2); 1193 } 1194 $newcharstring = ''; 1195 for ($i = 0; $i < strlen($string); $i += 2) { 1196 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1197 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1198 } 1199 return $newcharstring; 1200 } 1201 1202 /** 1203 * UTF-16 (BOM) => ISO-8859-1 1204 * 1205 * @param string $string 1206 * 1207 * @return string 1208 */ 1209 public static function iconv_fallback_utf16_iso88591($string) { 1210 $bom = substr($string, 0, 2); 1211 if ($bom == "\xFE\xFF") { 1212 return self::iconv_fallback_utf16be_iso88591(substr($string, 2)); 1213 } elseif ($bom == "\xFF\xFE") { 1214 return self::iconv_fallback_utf16le_iso88591(substr($string, 2)); 1215 } 1216 return $string; 1217 } 1218 1219 /** 1220 * UTF-16 (BOM) => UTF-8 1221 * 1222 * @param string $string 1223 * 1224 * @return string 1225 */ 1226 public static function iconv_fallback_utf16_utf8($string) { 1227 $bom = substr($string, 0, 2); 1228 if ($bom == "\xFE\xFF") { 1229 return self::iconv_fallback_utf16be_utf8(substr($string, 2)); 1230 } elseif ($bom == "\xFF\xFE") { 1231 return self::iconv_fallback_utf16le_utf8(substr($string, 2)); 1232 } 1233 return $string; 1234 } 1235 1236 /** 1237 * @param string $in_charset 1238 * @param string $out_charset 1239 * @param string $string 1240 * 1241 * @return string 1242 * @throws Exception 1243 */ 1244 public static function iconv_fallback($in_charset, $out_charset, $string) { 1245 1246 if ($in_charset == $out_charset) { 1247 return $string; 1248 } 1249 1250 // mb_convert_encoding() available 1251 if (function_exists('mb_convert_encoding')) { 1252 if ((strtoupper($in_charset) == 'UTF-16') && (substr($string, 0, 2) != "\xFE\xFF") && (substr($string, 0, 2) != "\xFF\xFE")) { 1253 // if BOM missing, mb_convert_encoding will mishandle the conversion, assume UTF-16BE and prepend appropriate BOM 1254 $string = "\xFF\xFE".$string; 1255 } 1256 if ((strtoupper($in_charset) == 'UTF-16') && (strtoupper($out_charset) == 'UTF-8')) { 1257 if (($string == "\xFF\xFE") || ($string == "\xFE\xFF")) { 1258 // if string consists of only BOM, mb_convert_encoding will return the BOM unmodified 1259 return ''; 1260 } 1261 } 1262 if ($converted_string = @mb_convert_encoding($string, $out_charset, $in_charset)) { 1263 switch ($out_charset) { 1264 case 'ISO-8859-1': 1265 $converted_string = rtrim($converted_string, "\x00"); 1266 break; 1267 } 1268 return $converted_string; 1269 } 1270 return $string; 1271 1272 // iconv() available 1273 } elseif (function_exists('iconv')) { 1274 if ($converted_string = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) { 1275 switch ($out_charset) { 1276 case 'ISO-8859-1': 1277 $converted_string = rtrim($converted_string, "\x00"); 1278 break; 1279 } 1280 return $converted_string; 1281 } 1282 1283 // iconv() may sometimes fail with "illegal character in input string" error message 1284 // and return an empty string, but returning the unconverted string is more useful 1285 return $string; 1286 } 1287 1288 1289 // neither mb_convert_encoding or iconv() is available 1290 static $ConversionFunctionList = array(); 1291 if (empty($ConversionFunctionList)) { 1292 $ConversionFunctionList['ISO-8859-1']['UTF-8'] = 'iconv_fallback_iso88591_utf8'; 1293 $ConversionFunctionList['ISO-8859-1']['UTF-16'] = 'iconv_fallback_iso88591_utf16'; 1294 $ConversionFunctionList['ISO-8859-1']['UTF-16BE'] = 'iconv_fallback_iso88591_utf16be'; 1295 $ConversionFunctionList['ISO-8859-1']['UTF-16LE'] = 'iconv_fallback_iso88591_utf16le'; 1296 $ConversionFunctionList['UTF-8']['ISO-8859-1'] = 'iconv_fallback_utf8_iso88591'; 1297 $ConversionFunctionList['UTF-8']['UTF-16'] = 'iconv_fallback_utf8_utf16'; 1298 $ConversionFunctionList['UTF-8']['UTF-16BE'] = 'iconv_fallback_utf8_utf16be'; 1299 $ConversionFunctionList['UTF-8']['UTF-16LE'] = 'iconv_fallback_utf8_utf16le'; 1300 $ConversionFunctionList['UTF-16']['ISO-8859-1'] = 'iconv_fallback_utf16_iso88591'; 1301 $ConversionFunctionList['UTF-16']['UTF-8'] = 'iconv_fallback_utf16_utf8'; 1302 $ConversionFunctionList['UTF-16LE']['ISO-8859-1'] = 'iconv_fallback_utf16le_iso88591'; 1303 $ConversionFunctionList['UTF-16LE']['UTF-8'] = 'iconv_fallback_utf16le_utf8'; 1304 $ConversionFunctionList['UTF-16BE']['ISO-8859-1'] = 'iconv_fallback_utf16be_iso88591'; 1305 $ConversionFunctionList['UTF-16BE']['UTF-8'] = 'iconv_fallback_utf16be_utf8'; 1306 } 1307 if (isset($ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)])) { 1308 $ConversionFunction = $ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)]; 1309 return self::$ConversionFunction($string); 1310 } 1311 throw new Exception('PHP does not has mb_convert_encoding() or iconv() support - cannot convert from '.$in_charset.' to '.$out_charset); 1312 } 1313 1314 /** 1315 * @param mixed $data 1316 * @param string $charset 1317 * 1318 * @return mixed 1319 */ 1320 public static function recursiveMultiByteCharString2HTML($data, $charset='ISO-8859-1') { 1321 if (is_string($data)) { 1322 return self::MultiByteCharString2HTML($data, $charset); 1323 } elseif (is_array($data)) { 1324 $return_data = array(); 1325 foreach ($data as $key => $value) { 1326 $return_data[$key] = self::recursiveMultiByteCharString2HTML($value, $charset); 1327 } 1328 return $return_data; 1329 } 1330 // integer, float, objects, resources, etc 1331 return $data; 1332 } 1333 1334 /** 1335 * @param string|int|float $string 1336 * @param string $charset 1337 * 1338 * @return string 1339 */ 1340 public static function MultiByteCharString2HTML($string, $charset='ISO-8859-1') { 1341 $string = (string) $string; // in case trying to pass a numeric (float, int) string, would otherwise return an empty string 1342 $HTMLstring = ''; 1343 1344 switch (strtolower($charset)) { 1345 case '1251': 1346 case '1252': 1347 case '866': 1348 case '932': 1349 case '936': 1350 case '950': 1351 case 'big5': 1352 case 'big5-hkscs': 1353 case 'cp1251': 1354 case 'cp1252': 1355 case 'cp866': 1356 case 'euc-jp': 1357 case 'eucjp': 1358 case 'gb2312': 1359 case 'ibm866': 1360 case 'iso-8859-1': 1361 case 'iso-8859-15': 1362 case 'iso8859-1': 1363 case 'iso8859-15': 1364 case 'koi8-r': 1365 case 'koi8-ru': 1366 case 'koi8r': 1367 case 'shift_jis': 1368 case 'sjis': 1369 case 'win-1251': 1370 case 'windows-1251': 1371 case 'windows-1252': 1372 $HTMLstring = htmlentities($string, ENT_COMPAT, $charset); 1373 break; 1374 1375 case 'utf-8': 1376 $strlen = strlen($string); 1377 for ($i = 0; $i < $strlen; $i++) { 1378 $char_ord_val = ord($string[$i]); 1379 $charval = 0; 1380 if ($char_ord_val < 0x80) { 1381 $charval = $char_ord_val; 1382 } elseif ((($char_ord_val & 0xF0) >> 4) == 0x0F && $i+3 < $strlen) { 1383 $charval = (($char_ord_val & 0x07) << 18); 1384 $charval += ((ord($string[++$i]) & 0x3F) << 12); 1385 $charval += ((ord($string[++$i]) & 0x3F) << 6); 1386 $charval += (ord($string[++$i]) & 0x3F); 1387 } elseif ((($char_ord_val & 0xE0) >> 5) == 0x07 && $i+2 < $strlen) { 1388 $charval = (($char_ord_val & 0x0F) << 12); 1389 $charval += ((ord($string[++$i]) & 0x3F) << 6); 1390 $charval += (ord($string[++$i]) & 0x3F); 1391 } elseif ((($char_ord_val & 0xC0) >> 6) == 0x03 && $i+1 < $strlen) { 1392 $charval = (($char_ord_val & 0x1F) << 6); 1393 $charval += (ord($string[++$i]) & 0x3F); 1394 } 1395 if (($charval >= 32) && ($charval <= 127)) { 1396 $HTMLstring .= htmlentities(chr($charval)); 1397 } else { 1398 $HTMLstring .= '&#'.$charval.';'; 1399 } 1400 } 1401 break; 1402 1403 case 'utf-16le': 1404 for ($i = 0; $i < strlen($string); $i += 2) { 1405 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1406 if (($charval >= 32) && ($charval <= 127)) { 1407 $HTMLstring .= chr($charval); 1408 } else { 1409 $HTMLstring .= '&#'.$charval.';'; 1410 } 1411 } 1412 break; 1413 1414 case 'utf-16be': 1415 for ($i = 0; $i < strlen($string); $i += 2) { 1416 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1417 if (($charval >= 32) && ($charval <= 127)) { 1418 $HTMLstring .= chr($charval); 1419 } else { 1420 $HTMLstring .= '&#'.$charval.';'; 1421 } 1422 } 1423 break; 1424 1425 default: 1426 $HTMLstring = 'ERROR: Character set "'.$charset.'" not supported in MultiByteCharString2HTML()'; 1427 break; 1428 } 1429 return $HTMLstring; 1430 } 1431 1432 /** 1433 * @param int $namecode 1434 * 1435 * @return string 1436 */ 1437 public static function RGADnameLookup($namecode) { 1438 static $RGADname = array(); 1439 if (empty($RGADname)) { 1440 $RGADname[0] = 'not set'; 1441 $RGADname[1] = 'Track Gain Adjustment'; 1442 $RGADname[2] = 'Album Gain Adjustment'; 1443 } 1444 1445 return (isset($RGADname[$namecode]) ? $RGADname[$namecode] : ''); 1446 } 1447 1448 /** 1449 * @param int $originatorcode 1450 * 1451 * @return string 1452 */ 1453 public static function RGADoriginatorLookup($originatorcode) { 1454 static $RGADoriginator = array(); 1455 if (empty($RGADoriginator)) { 1456 $RGADoriginator[0] = 'unspecified'; 1457 $RGADoriginator[1] = 'pre-set by artist/producer/mastering engineer'; 1458 $RGADoriginator[2] = 'set by user'; 1459 $RGADoriginator[3] = 'determined automatically'; 1460 } 1461 1462 return (isset($RGADoriginator[$originatorcode]) ? $RGADoriginator[$originatorcode] : ''); 1463 } 1464 1465 /** 1466 * @param int $rawadjustment 1467 * @param int $signbit 1468 * 1469 * @return float 1470 */ 1471 public static function RGADadjustmentLookup($rawadjustment, $signbit) { 1472 $adjustment = (float) $rawadjustment / 10; 1473 if ($signbit == 1) { 1474 $adjustment *= -1; 1475 } 1476 return $adjustment; 1477 } 1478 1479 /** 1480 * @param int $namecode 1481 * @param int $originatorcode 1482 * @param int $replaygain 1483 * 1484 * @return string 1485 */ 1486 public static function RGADgainString($namecode, $originatorcode, $replaygain) { 1487 if ($replaygain < 0) { 1488 $signbit = '1'; 1489 } else { 1490 $signbit = '0'; 1491 } 1492 $storedreplaygain = intval(round($replaygain * 10)); 1493 $gainstring = str_pad(decbin($namecode), 3, '0', STR_PAD_LEFT); 1494 $gainstring .= str_pad(decbin($originatorcode), 3, '0', STR_PAD_LEFT); 1495 $gainstring .= $signbit; 1496 $gainstring .= str_pad(decbin($storedreplaygain), 9, '0', STR_PAD_LEFT); 1497 1498 return $gainstring; 1499 } 1500 1501 /** 1502 * @param float $amplitude 1503 * 1504 * @return float 1505 */ 1506 public static function RGADamplitude2dB($amplitude) { 1507 return 20 * log10($amplitude); 1508 } 1509 1510 /** 1511 * @param string $imgData 1512 * @param array $imageinfo 1513 * 1514 * @return array|false 1515 */ 1516 public static function GetDataImageSize($imgData, &$imageinfo=array()) { 1517 if (PHP_VERSION_ID >= 50400) { 1518 $GetDataImageSize = @getimagesizefromstring($imgData, $imageinfo); 1519 if ($GetDataImageSize === false) { 1520 return false; 1521 } 1522 $GetDataImageSize['height'] = $GetDataImageSize[0]; 1523 $GetDataImageSize['width'] = $GetDataImageSize[1]; 1524 return $GetDataImageSize; 1525 } 1526 static $tempdir = ''; 1527 if (empty($tempdir)) { 1528 if (function_exists('sys_get_temp_dir')) { 1529 $tempdir = sys_get_temp_dir(); // https://github.com/JamesHeinrich/getID3/issues/52 1530 } 1531 1532 // yes this is ugly, feel free to suggest a better way 1533 if (include_once(dirname(__FILE__).'/getid3.php')) { 1534 $getid3_temp = new getID3(); 1535 if ($getid3_temp_tempdir = $getid3_temp->tempdir) { 1536 $tempdir = $getid3_temp_tempdir; 1537 } 1538 unset($getid3_temp, $getid3_temp_tempdir); 1539 } 1540 } 1541 $GetDataImageSize = false; 1542 if ($tempfilename = tempnam($tempdir, 'gI3')) { 1543 if (is_writable($tempfilename) && is_file($tempfilename) && ($tmp = fopen($tempfilename, 'wb'))) { 1544 fwrite($tmp, $imgData); 1545 fclose($tmp); 1546 $GetDataImageSize = @getimagesize($tempfilename, $imageinfo); 1547 if ($GetDataImageSize === false) { 1548 return false; 1549 } 1550 $GetDataImageSize['height'] = $GetDataImageSize[0]; 1551 $GetDataImageSize['width'] = $GetDataImageSize[1]; 1552 } 1553 unlink($tempfilename); 1554 } 1555 return $GetDataImageSize; 1556 } 1557 1558 /** 1559 * @param string $mime_type 1560 * 1561 * @return string 1562 */ 1563 public static function ImageExtFromMime($mime_type) { 1564 // temporary way, works OK for now, but should be reworked in the future 1565 return str_replace(array('image/', 'x-', 'jpeg'), array('', '', 'jpg'), $mime_type); 1566 } 1567 1568 /** 1569 * @param array $ThisFileInfo 1570 * @param bool $option_tags_html default true (just as in the main getID3 class) 1571 * 1572 * @return bool 1573 */ 1574 public static function CopyTagsToComments(&$ThisFileInfo, $option_tags_html=true) { 1575 // Copy all entries from ['tags'] into common ['comments'] 1576 if (!empty($ThisFileInfo['tags'])) { 1577 1578 // Some tag types can only support limited character sets and may contain data in non-standard encoding (usually ID3v1) 1579 // and/or poorly-transliterated tag values that are also in tag formats that do support full-range character sets 1580 // To make the output more user-friendly, process the potentially-problematic tag formats last to enhance the chance that 1581 // the first entries in [comments] are the most correct and the "bad" ones (if any) come later. 1582 // https://github.com/JamesHeinrich/getID3/issues/338 1583 $processLastTagTypes = array('id3v1','riff'); 1584 foreach ($processLastTagTypes as $processLastTagType) { 1585 if (isset($ThisFileInfo['tags'][$processLastTagType])) { 1586 // bubble ID3v1 to the end, if present to aid in detecting bad ID3v1 encodings 1587 $temp = $ThisFileInfo['tags'][$processLastTagType]; 1588 unset($ThisFileInfo['tags'][$processLastTagType]); 1589 $ThisFileInfo['tags'][$processLastTagType] = $temp; 1590 unset($temp); 1591 } 1592 } 1593 foreach ($ThisFileInfo['tags'] as $tagtype => $tagarray) { 1594 foreach ($tagarray as $tagname => $tagdata) { 1595 foreach ($tagdata as $key => $value) { 1596 if (!empty($value)) { 1597 if (empty($ThisFileInfo['comments'][$tagname])) { 1598 1599 // fall through and append value 1600 1601 } elseif ($tagtype == 'id3v1') { 1602 1603 $newvaluelength = strlen(trim($value)); 1604 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) { 1605 $oldvaluelength = strlen(trim($existingvalue)); 1606 if (($newvaluelength <= $oldvaluelength) && (substr($existingvalue, 0, $newvaluelength) == trim($value))) { 1607 // new value is identical but shorter-than (or equal-length to) one already in comments - skip 1608 break 2; 1609 } 1610 1611 if (function_exists('mb_convert_encoding')) { 1612 if (trim($value) == trim(substr(mb_convert_encoding($existingvalue, $ThisFileInfo['id3v1']['encoding'], $ThisFileInfo['encoding']), 0, 30))) { 1613 // value stored in ID3v1 appears to be probably the multibyte value transliterated (badly) into ISO-8859-1 in ID3v1. 1614 // As an example, Foobar2000 will do this if you tag a file with Chinese or Arabic or Cyrillic or something that doesn't fit into ISO-8859-1 the ID3v1 will consist of mostly "?" characters, one per multibyte unrepresentable character 1615 break 2; 1616 } 1617 } 1618 } 1619 1620 } elseif (!is_array($value)) { 1621 1622 $newvaluelength = strlen(trim($value)); 1623 $newvaluelengthMB = mb_strlen(trim($value)); 1624 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) { 1625 $oldvaluelength = strlen(trim($existingvalue)); 1626 $oldvaluelengthMB = mb_strlen(trim($existingvalue)); 1627 if (($newvaluelengthMB == $oldvaluelengthMB) && ($existingvalue == getid3_lib::iconv_fallback('UTF-8', 'ASCII', $value))) { 1628 // https://github.com/JamesHeinrich/getID3/issues/338 1629 // check for tags containing extended characters that may have been forced into limited-character storage (e.g. UTF8 values into ASCII) 1630 // which will usually display unrepresentable characters as "?" 1631 $ThisFileInfo['comments'][$tagname][$existingkey] = trim($value); 1632 break; 1633 } 1634 if ((strlen($existingvalue) > 10) && ($newvaluelength > $oldvaluelength) && (substr(trim($value), 0, strlen($existingvalue)) == $existingvalue)) { 1635 $ThisFileInfo['comments'][$tagname][$existingkey] = trim($value); 1636 break; 1637 } 1638 } 1639 1640 } 1641 if (is_array($value) || empty($ThisFileInfo['comments'][$tagname]) || !in_array(trim($value), $ThisFileInfo['comments'][$tagname])) { 1642 $value = (is_string($value) ? trim($value) : $value); 1643 if (!is_int($key) && !ctype_digit($key)) { 1644 $ThisFileInfo['comments'][$tagname][$key] = $value; 1645 } else { 1646 if (!isset($ThisFileInfo['comments'][$tagname])) { 1647 $ThisFileInfo['comments'][$tagname] = array($value); 1648 } else { 1649 $ThisFileInfo['comments'][$tagname][] = $value; 1650 } 1651 } 1652 } 1653 } 1654 } 1655 } 1656 } 1657 1658 // attempt to standardize spelling of returned keys 1659 if (!empty($ThisFileInfo['comments'])) { 1660 $StandardizeFieldNames = array( 1661 'tracknumber' => 'track_number', 1662 'track' => 'track_number', 1663 ); 1664 foreach ($StandardizeFieldNames as $badkey => $goodkey) { 1665 if (array_key_exists($badkey, $ThisFileInfo['comments']) && !array_key_exists($goodkey, $ThisFileInfo['comments'])) { 1666 $ThisFileInfo['comments'][$goodkey] = $ThisFileInfo['comments'][$badkey]; 1667 unset($ThisFileInfo['comments'][$badkey]); 1668 } 1669 } 1670 } 1671 1672 if ($option_tags_html) { 1673 // Copy ['comments'] to ['comments_html'] 1674 if (!empty($ThisFileInfo['comments'])) { 1675 foreach ($ThisFileInfo['comments'] as $field => $values) { 1676 if ($field == 'picture') { 1677 // pictures can take up a lot of space, and we don't need multiple copies of them 1678 // let there be a single copy in [comments][picture], and not elsewhere 1679 continue; 1680 } 1681 foreach ($values as $index => $value) { 1682 if (is_array($value)) { 1683 $ThisFileInfo['comments_html'][$field][$index] = $value; 1684 } else { 1685 $ThisFileInfo['comments_html'][$field][$index] = str_replace('�', '', self::MultiByteCharString2HTML($value, $ThisFileInfo['encoding'])); 1686 } 1687 } 1688 } 1689 } 1690 } 1691 1692 } 1693 return true; 1694 } 1695 1696 /** 1697 * @param string $key 1698 * @param int $begin 1699 * @param int $end 1700 * @param string $file 1701 * @param string $name 1702 * 1703 * @return string 1704 */ 1705 public static function EmbeddedLookup($key, $begin, $end, $file, $name) { 1706 1707 // Cached 1708 static $cache; 1709 if (isset($cache[$file][$name])) { 1710 return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : ''); 1711 } 1712 1713 // Init 1714 $keylength = strlen($key); 1715 $line_count = $end - $begin - 7; 1716 1717 // Open php file 1718 $fp = fopen($file, 'r'); 1719 1720 // Discard $begin lines 1721 for ($i = 0; $i < ($begin + 3); $i++) { 1722 fgets($fp, 1024); 1723 } 1724 1725 // Loop thru line 1726 while (0 < $line_count--) { 1727 1728 // Read line 1729 $line = ltrim(fgets($fp, 1024), "\t "); 1730 1731 // METHOD A: only cache the matching key - less memory but slower on next lookup of not-previously-looked-up key 1732 //$keycheck = substr($line, 0, $keylength); 1733 //if ($key == $keycheck) { 1734 // $cache[$file][$name][$keycheck] = substr($line, $keylength + 1); 1735 // break; 1736 //} 1737 1738 // METHOD B: cache all keys in this lookup - more memory but faster on next lookup of not-previously-looked-up key 1739 //$cache[$file][$name][substr($line, 0, $keylength)] = trim(substr($line, $keylength + 1)); 1740 $explodedLine = explode("\t", $line, 2); 1741 $ThisKey = $explodedLine[0]; 1742 $ThisValue = (isset($explodedLine[1]) ? $explodedLine[1] : ''); 1743 $cache[$file][$name][$ThisKey] = trim($ThisValue); 1744 } 1745 1746 // Close and return 1747 fclose($fp); 1748 return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : ''); 1749 } 1750 1751 /** 1752 * @param string $filename 1753 * @param string $sourcefile 1754 * @param bool $DieOnFailure 1755 * 1756 * @return bool 1757 * @throws Exception 1758 */ 1759 public static function IncludeDependency($filename, $sourcefile, $DieOnFailure=false) { 1760 global $GETID3_ERRORARRAY; 1761 1762 if (file_exists($filename)) { 1763 if (include_once($filename)) { 1764 return true; 1765 } else { 1766 $diemessage = basename($sourcefile).' depends on '.$filename.', which has errors'; 1767 } 1768 } else { 1769 $diemessage = basename($sourcefile).' depends on '.$filename.', which is missing'; 1770 } 1771 if ($DieOnFailure) { 1772 throw new Exception($diemessage); 1773 } else { 1774 $GETID3_ERRORARRAY[] = $diemessage; 1775 } 1776 return false; 1777 } 1778 1779 /** 1780 * @param string $string 1781 * 1782 * @return string 1783 */ 1784 public static function trimNullByte($string) { 1785 return trim($string, "\x00"); 1786 } 1787 1788 /** 1789 * @param string $path 1790 * 1791 * @return float|bool 1792 */ 1793 public static function getFileSizeSyscall($path) { 1794 $commandline = null; 1795 $filesize = false; 1796 1797 if (GETID3_OS_ISWINDOWS) { 1798 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: 1799 $filesystem = new COM('Scripting.FileSystemObject'); 1800 $file = $filesystem->GetFile($path); 1801 $filesize = $file->Size(); 1802 unset($filesystem, $file); 1803 } else { 1804 $commandline = 'for %I in ('.escapeshellarg($path).') do @echo %~zI'; 1805 } 1806 } else { 1807 $commandline = 'ls -l '.escapeshellarg($path).' | awk \'{print $5}\''; 1808 } 1809 if (isset($commandline)) { 1810 $output = trim(shell_exec($commandline)); 1811 if (ctype_digit($output)) { 1812 $filesize = (float) $output; 1813 } 1814 } 1815 return $filesize; 1816 } 1817 1818 /** 1819 * @param string $filename 1820 * 1821 * @return string|false 1822 */ 1823 public static function truepath($filename) { 1824 // 2017-11-08: this could use some improvement, patches welcome 1825 if (preg_match('#^(\\\\\\\\|//)[a-z0-9]#i', $filename, $matches)) { 1826 // PHP's built-in realpath function does not work on UNC Windows shares 1827 $goodpath = array(); 1828 foreach (explode('/', str_replace('\\', '/', $filename)) as $part) { 1829 if ($part == '.') { 1830 continue; 1831 } 1832 if ($part == '..') { 1833 if (count($goodpath)) { 1834 array_pop($goodpath); 1835 } else { 1836 // cannot step above this level, already at top level 1837 return false; 1838 } 1839 } else { 1840 $goodpath[] = $part; 1841 } 1842 } 1843 return implode(DIRECTORY_SEPARATOR, $goodpath); 1844 } 1845 return realpath($filename); 1846 } 1847 1848 /** 1849 * Workaround for Bug #37268 (https://bugs.php.net/bug.php?id=37268) 1850 * 1851 * @param string $path A path. 1852 * @param string $suffix If the name component ends in suffix this will also be cut off. 1853 * 1854 * @return string 1855 */ 1856 public static function mb_basename($path, $suffix = '') { 1857 $splited = preg_split('#/#', rtrim($path, '/ ')); 1858 return substr(basename('X'.$splited[count($splited) - 1], $suffix), 1); 1859 } 1860 1861 }
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| Generated : Fri Nov 13 08:20:01 2026 | Cross-referenced by PHPXref |