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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_NOENT | LIBXML_NONET | LIBXML_NOWARNING | LIBXML_COMPACT); 17 } else { 18 define('GETID3_LIBXML_OPTIONS', LIBXML_NOENT | LIBXML_NONET | LIBXML_NOWARNING); 19 } 20 } 21 22 class getid3_lib 23 { 24 /** 25 * @param string $string 26 * @param bool $hex 27 * @param bool $spaces 28 * @param string|bool $htmlencoding 29 * 30 * @return string 31 */ 32 public static function PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8') { 33 $returnstring = ''; 34 for ($i = 0; $i < strlen($string); $i++) { 35 if ($hex) { 36 $returnstring .= str_pad(dechex(ord($string[$i])), 2, '0', STR_PAD_LEFT); 37 } else { 38 $returnstring .= ' '.(preg_match("#[\x20-\x7E]#", $string[$i]) ? $string[$i] : '¤'); 39 } 40 if ($spaces) { 41 $returnstring .= ' '; 42 } 43 } 44 if (!empty($htmlencoding)) { 45 if ($htmlencoding === true) { 46 $htmlencoding = 'UTF-8'; // prior to getID3 v1.9.0 the function's 4th parameter was boolean 47 } 48 $returnstring = htmlentities($returnstring, ENT_QUOTES, $htmlencoding); 49 } 50 return $returnstring; 51 } 52 53 /** 54 * Truncates a floating-point number at the decimal point. 55 * 56 * @param float $floatnumber 57 * 58 * @return float|int returns int (if possible, otherwise float) 59 */ 60 public static function trunc($floatnumber) { 61 if ($floatnumber >= 1) { 62 $truncatednumber = floor($floatnumber); 63 } elseif ($floatnumber <= -1) { 64 $truncatednumber = ceil($floatnumber); 65 } else { 66 $truncatednumber = 0; 67 } 68 if (self::intValueSupported($truncatednumber)) { 69 $truncatednumber = (int) $truncatednumber; 70 } 71 return $truncatednumber; 72 } 73 74 /** 75 * @param int|null $variable 76 * @param int $increment 77 * 78 * @return bool 79 */ 80 public static function safe_inc(&$variable, $increment=1) { 81 if (isset($variable)) { 82 $variable += $increment; 83 } else { 84 $variable = $increment; 85 } 86 return true; 87 } 88 89 /** 90 * @param int|float $floatnum 91 * 92 * @return int|float 93 */ 94 public static function CastAsInt($floatnum) { 95 // convert to float if not already 96 $floatnum = (float) $floatnum; 97 98 // convert a float to type int, only if possible 99 if (self::trunc($floatnum) == $floatnum) { 100 // it's not floating point 101 if (self::intValueSupported($floatnum)) { 102 // it's within int range 103 $floatnum = (int) $floatnum; 104 } 105 } 106 return $floatnum; 107 } 108 109 /** 110 * @param int $num 111 * 112 * @return bool 113 */ 114 public static function intValueSupported($num) { 115 // check if integers are 64-bit 116 static $hasINT64 = null; 117 if ($hasINT64 === null) { // 10x faster than is_null() 118 $hasINT64 = is_int(pow(2, 31)); // 32-bit int are limited to (2^31)-1 119 if (!$hasINT64 && !defined('PHP_INT_MIN')) { 120 define('PHP_INT_MIN', ~PHP_INT_MAX); 121 } 122 } 123 // if integers are 64-bit - no other check required 124 if ($hasINT64 || (($num <= PHP_INT_MAX) && ($num >= PHP_INT_MIN))) { 125 return true; 126 } 127 return false; 128 } 129 130 /** 131 * Perform a division, guarding against division by zero 132 * 133 * @param float|int $numerator 134 * @param float|int $denominator 135 * @param float|int $fallback 136 * @return float|int 137 */ 138 public static function SafeDiv($numerator, $denominator, $fallback = 0) { 139 return $denominator ? $numerator / $denominator : $fallback; 140 } 141 142 /** 143 * @param string $fraction 144 * 145 * @return float 146 */ 147 public static function DecimalizeFraction($fraction) { 148 list($numerator, $denominator) = explode('/', $fraction); 149 return (int) $numerator / ($denominator ? $denominator : 1); 150 } 151 152 /** 153 * @param string $binarynumerator 154 * 155 * @return float 156 */ 157 public static function DecimalBinary2Float($binarynumerator) { 158 $numerator = self::Bin2Dec($binarynumerator); 159 $denominator = self::Bin2Dec('1'.str_repeat('0', strlen($binarynumerator))); 160 return ($numerator / $denominator); 161 } 162 163 /** 164 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html 165 * 166 * @param string $binarypointnumber 167 * @param int $maxbits 168 * 169 * @return array 170 */ 171 public static function NormalizeBinaryPoint($binarypointnumber, $maxbits=52) { 172 if (strpos($binarypointnumber, '.') === false) { 173 $binarypointnumber = '0.'.$binarypointnumber; 174 } elseif ($binarypointnumber[0] == '.') { 175 $binarypointnumber = '0'.$binarypointnumber; 176 } 177 $exponent = 0; 178 while (($binarypointnumber[0] != '1') || (substr($binarypointnumber, 1, 1) != '.')) { 179 if (substr($binarypointnumber, 1, 1) == '.') { 180 $exponent--; 181 $binarypointnumber = substr($binarypointnumber, 2, 1).'.'.substr($binarypointnumber, 3); 182 } else { 183 $pointpos = strpos($binarypointnumber, '.'); 184 $exponent += ($pointpos - 1); 185 $binarypointnumber = str_replace('.', '', $binarypointnumber); 186 $binarypointnumber = $binarypointnumber[0].'.'.substr($binarypointnumber, 1); 187 } 188 } 189 $binarypointnumber = str_pad(substr($binarypointnumber, 0, $maxbits + 2), $maxbits + 2, '0', STR_PAD_RIGHT); 190 return array('normalized'=>$binarypointnumber, 'exponent'=>(int) $exponent); 191 } 192 193 /** 194 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html 195 * 196 * @param float $floatvalue 197 * 198 * @return string 199 */ 200 public static function Float2BinaryDecimal($floatvalue) { 201 $maxbits = 128; // to how many bits of precision should the calculations be taken? 202 $intpart = self::trunc($floatvalue); 203 $floatpart = abs($floatvalue - $intpart); 204 $pointbitstring = ''; 205 while (($floatpart != 0) && (strlen($pointbitstring) < $maxbits)) { 206 $floatpart *= 2; 207 $pointbitstring .= (string) self::trunc($floatpart); 208 $floatpart -= self::trunc($floatpart); 209 } 210 $binarypointnumber = decbin($intpart).'.'.$pointbitstring; 211 return $binarypointnumber; 212 } 213 214 /** 215 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html 216 * 217 * @param float $floatvalue 218 * @param int $bits 219 * 220 * @return string|false 221 */ 222 public static function Float2String($floatvalue, $bits) { 223 $exponentbits = 0; 224 $fractionbits = 0; 225 switch ($bits) { 226 case 32: 227 $exponentbits = 8; 228 $fractionbits = 23; 229 break; 230 231 case 64: 232 $exponentbits = 11; 233 $fractionbits = 52; 234 break; 235 236 default: 237 return false; 238 } 239 if ($floatvalue >= 0) { 240 $signbit = '0'; 241 } else { 242 $signbit = '1'; 243 } 244 $normalizedbinary = self::NormalizeBinaryPoint(self::Float2BinaryDecimal($floatvalue), $fractionbits); 245 $biasedexponent = pow(2, $exponentbits - 1) - 1 + $normalizedbinary['exponent']; // (127 or 1023) +/- exponent 246 $exponentbitstring = str_pad(decbin($biasedexponent), $exponentbits, '0', STR_PAD_LEFT); 247 $fractionbitstring = str_pad(substr($normalizedbinary['normalized'], 2), $fractionbits, '0', STR_PAD_RIGHT); 248 249 return self::BigEndian2String(self::Bin2Dec($signbit.$exponentbitstring.$fractionbitstring), $bits % 8, false); 250 } 251 252 /** 253 * @param string $byteword 254 * 255 * @return float|false 256 */ 257 public static function LittleEndian2Float($byteword) { 258 return self::BigEndian2Float(strrev($byteword)); 259 } 260 261 /** 262 * ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic 263 * 264 * @link https://web.archive.org/web/20120325162206/http://www.psc.edu/general/software/packages/ieee/ieee.php 265 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html 266 * 267 * @param string $byteword 268 * 269 * @return float|false 270 */ 271 public static function BigEndian2Float($byteword) { 272 $bitword = self::BigEndian2Bin($byteword); 273 if (!$bitword) { 274 return 0; 275 } 276 $signbit = $bitword[0]; 277 $floatvalue = 0; 278 $exponentbits = 0; 279 $fractionbits = 0; 280 281 switch (strlen($byteword) * 8) { 282 case 32: 283 $exponentbits = 8; 284 $fractionbits = 23; 285 break; 286 287 case 64: 288 $exponentbits = 11; 289 $fractionbits = 52; 290 break; 291 292 case 80: 293 // 80-bit Apple SANE format 294 // http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/ 295 $exponentstring = substr($bitword, 1, 15); 296 $isnormalized = intval($bitword[16]); 297 $fractionstring = substr($bitword, 17, 63); 298 $exponent = pow(2, self::Bin2Dec($exponentstring) - 16383); 299 $fraction = $isnormalized + self::DecimalBinary2Float($fractionstring); 300 $floatvalue = $exponent * $fraction; 301 if ($signbit == '1') { 302 $floatvalue *= -1; 303 } 304 return $floatvalue; 305 306 default: 307 return false; 308 } 309 $exponentstring = substr($bitword, 1, $exponentbits); 310 $fractionstring = substr($bitword, $exponentbits + 1, $fractionbits); 311 $exponent = self::Bin2Dec($exponentstring); 312 $fraction = self::Bin2Dec($fractionstring); 313 314 if (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction != 0)) { 315 // Not a Number 316 $floatvalue = NAN; 317 } elseif (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction == 0)) { 318 if ($signbit == '1') { 319 $floatvalue = -INF; 320 } else { 321 $floatvalue = INF; 322 } 323 } elseif (($exponent == 0) && ($fraction == 0)) { 324 if ($signbit == '1') { 325 $floatvalue = -0.0; 326 } else { 327 $floatvalue = 0.0; 328 } 329 } elseif (($exponent == 0) && ($fraction != 0)) { 330 // These are 'unnormalized' values 331 $floatvalue = pow(2, (-1 * (pow(2, $exponentbits - 1) - 2))) * self::DecimalBinary2Float($fractionstring); 332 if ($signbit == '1') { 333 $floatvalue *= -1; 334 } 335 } elseif ($exponent != 0) { 336 $floatvalue = pow(2, ($exponent - (pow(2, $exponentbits - 1) - 1))) * (1 + self::DecimalBinary2Float($fractionstring)); 337 if ($signbit == '1') { 338 $floatvalue *= -1; 339 } 340 } 341 return (float) $floatvalue; 342 } 343 344 /** 345 * @param string $byteword 346 * @param bool $synchsafe 347 * @param bool $signed 348 * 349 * @return int|float|false 350 * @throws Exception 351 */ 352 public static function BigEndian2Int($byteword, $synchsafe=false, $signed=false) { 353 $intvalue = 0; 354 $bytewordlen = strlen($byteword); 355 if ($bytewordlen == 0) { 356 return false; 357 } 358 for ($i = 0; $i < $bytewordlen; $i++) { 359 if ($synchsafe) { // disregard MSB, effectively 7-bit bytes 360 //$intvalue = $intvalue | (ord($byteword{$i}) & 0x7F) << (($bytewordlen - 1 - $i) * 7); // faster, but runs into problems past 2^31 on 32-bit systems 361 $intvalue += (ord($byteword[$i]) & 0x7F) * pow(2, ($bytewordlen - 1 - $i) * 7); 362 } else { 363 $intvalue += ord($byteword[$i]) * pow(256, ($bytewordlen - 1 - $i)); 364 } 365 } 366 if ($signed && !$synchsafe) { 367 // synchsafe ints are not allowed to be signed 368 if ($bytewordlen <= PHP_INT_SIZE) { 369 $signMaskBit = 0x80 << (8 * ($bytewordlen - 1)); 370 if ($intvalue & $signMaskBit) { 371 $intvalue = 0 - ($intvalue & ($signMaskBit - 1)); 372 } 373 } else { 374 throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits ('.strlen($byteword).') in self::BigEndian2Int()'); 375 } 376 } 377 return self::CastAsInt($intvalue); 378 } 379 380 /** 381 * @param string $byteword 382 * @param bool $signed 383 * 384 * @return int|float|false 385 */ 386 public static function LittleEndian2Int($byteword, $signed=false) { 387 return self::BigEndian2Int(strrev($byteword), false, $signed); 388 } 389 390 /** 391 * @param string $byteword 392 * 393 * @return string 394 */ 395 public static function LittleEndian2Bin($byteword) { 396 return self::BigEndian2Bin(strrev($byteword)); 397 } 398 399 /** 400 * @param string $byteword 401 * 402 * @return string 403 */ 404 public static function BigEndian2Bin($byteword) { 405 $binvalue = ''; 406 $bytewordlen = strlen($byteword); 407 for ($i = 0; $i < $bytewordlen; $i++) { 408 $binvalue .= str_pad(decbin(ord($byteword[$i])), 8, '0', STR_PAD_LEFT); 409 } 410 return $binvalue; 411 } 412 413 /** 414 * @param int $number 415 * @param int $minbytes 416 * @param bool $synchsafe 417 * @param bool $signed 418 * 419 * @return string 420 * @throws Exception 421 */ 422 public static function BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false) { 423 if ($number < 0) { 424 throw new Exception('ERROR: self::BigEndian2String() does not support negative numbers'); 425 } 426 $maskbyte = (($synchsafe || $signed) ? 0x7F : 0xFF); 427 $intstring = ''; 428 if ($signed) { 429 if ($minbytes > PHP_INT_SIZE) { 430 throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits in self::BigEndian2String()'); 431 } 432 $number = $number & (0x80 << (8 * ($minbytes - 1))); 433 } 434 while ($number != 0) { 435 $quotient = ($number / ($maskbyte + 1)); 436 $intstring = chr(ceil(($quotient - floor($quotient)) * $maskbyte)).$intstring; 437 $number = floor($quotient); 438 } 439 return str_pad($intstring, $minbytes, "\x00", STR_PAD_LEFT); 440 } 441 442 /** 443 * @param int $number 444 * 445 * @return string 446 */ 447 public static function Dec2Bin($number) { 448 if (!is_numeric($number)) { 449 // https://github.com/JamesHeinrich/getID3/issues/299 450 trigger_error('TypeError: Dec2Bin(): Argument #1 ($number) must be numeric, '.gettype($number).' given', E_USER_WARNING); 451 return ''; 452 } 453 $bytes = array(); 454 while ($number >= 256) { 455 $bytes[] = (int) (($number / 256) - (floor($number / 256))) * 256; 456 $number = floor($number / 256); 457 } 458 $bytes[] = (int) $number; 459 $binstring = ''; 460 foreach ($bytes as $i => $byte) { 461 $binstring = (($i == count($bytes) - 1) ? decbin($byte) : str_pad(decbin($byte), 8, '0', STR_PAD_LEFT)).$binstring; 462 } 463 return $binstring; 464 } 465 466 /** 467 * @param string $binstring 468 * @param bool $signed 469 * 470 * @return int|float 471 */ 472 public static function Bin2Dec($binstring, $signed=false) { 473 $signmult = 1; 474 if ($signed) { 475 if ($binstring[0] == '1') { 476 $signmult = -1; 477 } 478 $binstring = substr($binstring, 1); 479 } 480 $decvalue = 0; 481 for ($i = 0; $i < strlen($binstring); $i++) { 482 $decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i); 483 } 484 return self::CastAsInt($decvalue * $signmult); 485 } 486 487 /** 488 * @param string $binstring 489 * 490 * @return string 491 */ 492 public static function Bin2String($binstring) { 493 // return 'hi' for input of '0110100001101001' 494 $string = ''; 495 $binstringreversed = strrev($binstring); 496 for ($i = 0; $i < strlen($binstringreversed); $i += 8) { 497 $string = chr(self::Bin2Dec(strrev(substr($binstringreversed, $i, 8)))).$string; 498 } 499 return $string; 500 } 501 502 /** 503 * @param int $number 504 * @param int $minbytes 505 * @param bool $synchsafe 506 * 507 * @return string 508 */ 509 public static function LittleEndian2String($number, $minbytes=1, $synchsafe=false) { 510 $intstring = ''; 511 while ($number > 0) { 512 if ($synchsafe) { 513 $intstring = $intstring.chr($number & 127); 514 $number >>= 7; 515 } else { 516 $intstring = $intstring.chr($number & 255); 517 $number >>= 8; 518 } 519 } 520 return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT); 521 } 522 523 /** 524 * @param mixed $array1 525 * @param mixed $array2 526 * 527 * @return array|false 528 */ 529 public static function array_merge_clobber($array1, $array2) { 530 // written by kcØhireability*com 531 // taken from http://www.php.net/manual/en/function.array-merge-recursive.php 532 if (!is_array($array1) || !is_array($array2)) { 533 return false; 534 } 535 $newarray = $array1; 536 foreach ($array2 as $key => $val) { 537 if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) { 538 $newarray[$key] = self::array_merge_clobber($newarray[$key], $val); 539 } else { 540 $newarray[$key] = $val; 541 } 542 } 543 return $newarray; 544 } 545 546 /** 547 * @param mixed $array1 548 * @param mixed $array2 549 * 550 * @return array|false 551 */ 552 public static function array_merge_noclobber($array1, $array2) { 553 if (!is_array($array1) || !is_array($array2)) { 554 return false; 555 } 556 $newarray = $array1; 557 foreach ($array2 as $key => $val) { 558 if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) { 559 $newarray[$key] = self::array_merge_noclobber($newarray[$key], $val); 560 } elseif (!isset($newarray[$key])) { 561 $newarray[$key] = $val; 562 } 563 } 564 return $newarray; 565 } 566 567 /** 568 * @param mixed $array1 569 * @param mixed $array2 570 * 571 * @return array|false|null 572 */ 573 public static function flipped_array_merge_noclobber($array1, $array2) { 574 if (!is_array($array1) || !is_array($array2)) { 575 return false; 576 } 577 # naturally, this only works non-recursively 578 $newarray = array_flip($array1); 579 foreach (array_flip($array2) as $key => $val) { 580 if (!isset($newarray[$key])) { 581 $newarray[$key] = count($newarray); 582 } 583 } 584 return array_flip($newarray); 585 } 586 587 /** 588 * @param array $theArray 589 * 590 * @return bool 591 */ 592 public static function ksort_recursive(&$theArray) { 593 ksort($theArray); 594 foreach ($theArray as $key => $value) { 595 if (is_array($value)) { 596 self::ksort_recursive($theArray[$key]); 597 } 598 } 599 return true; 600 } 601 602 /** 603 * @param string $filename 604 * @param int $numextensions 605 * 606 * @return string 607 */ 608 public static function fileextension($filename, $numextensions=1) { 609 if (strstr($filename, '.')) { 610 $reversedfilename = strrev($filename); 611 $offset = 0; 612 for ($i = 0; $i < $numextensions; $i++) { 613 $offset = strpos($reversedfilename, '.', $offset + 1); 614 if ($offset === false) { 615 return ''; 616 } 617 } 618 return strrev(substr($reversedfilename, 0, $offset)); 619 } 620 return ''; 621 } 622 623 /** 624 * @param int $seconds 625 * 626 * @return string 627 */ 628 public static function PlaytimeString($seconds) { 629 $sign = (($seconds < 0) ? '-' : ''); 630 $seconds = round(abs($seconds)); 631 $H = (int) floor( $seconds / 3600); 632 $M = (int) floor(($seconds - (3600 * $H) ) / 60); 633 $S = (int) round( $seconds - (3600 * $H) - (60 * $M) ); 634 return $sign.($H ? $H.':' : '').($H ? str_pad($M, 2, '0', STR_PAD_LEFT) : intval($M)).':'.str_pad($S, 2, 0, STR_PAD_LEFT); 635 } 636 637 /** 638 * @param int $macdate 639 * 640 * @return int|float 641 */ 642 public static function DateMac2Unix($macdate) { 643 // Macintosh timestamp: seconds since 00:00h January 1, 1904 644 // UNIX timestamp: seconds since 00:00h January 1, 1970 645 return self::CastAsInt($macdate - 2082844800); 646 } 647 648 /** 649 * @param string $rawdata 650 * 651 * @return float 652 */ 653 public static function FixedPoint8_8($rawdata) { 654 return self::BigEndian2Int(substr($rawdata, 0, 1)) + (float) (self::BigEndian2Int(substr($rawdata, 1, 1)) / pow(2, 8)); 655 } 656 657 /** 658 * @param string $rawdata 659 * 660 * @return float 661 */ 662 public static function FixedPoint16_16($rawdata) { 663 return self::BigEndian2Int(substr($rawdata, 0, 2)) + (float) (self::BigEndian2Int(substr($rawdata, 2, 2)) / pow(2, 16)); 664 } 665 666 /** 667 * @param string $rawdata 668 * 669 * @return float 670 */ 671 public static function FixedPoint2_30($rawdata) { 672 $binarystring = self::BigEndian2Bin($rawdata); 673 return self::Bin2Dec(substr($binarystring, 0, 2)) + (float) (self::Bin2Dec(substr($binarystring, 2, 30)) / pow(2, 30)); 674 } 675 676 677 /** 678 * @param string $ArrayPath 679 * @param string $Separator 680 * @param mixed $Value 681 * 682 * @return array 683 */ 684 public static function CreateDeepArray($ArrayPath, $Separator, $Value) { 685 // assigns $Value to a nested array path: 686 // $foo = self::CreateDeepArray('/path/to/my', '/', 'file.txt') 687 // is the same as: 688 // $foo = array('path'=>array('to'=>'array('my'=>array('file.txt')))); 689 // or 690 // $foo['path']['to']['my'] = 'file.txt'; 691 $ArrayPath = ltrim($ArrayPath, $Separator); 692 $ReturnedArray = array(); 693 if (($pos = strpos($ArrayPath, $Separator)) !== false) { 694 $ReturnedArray[substr($ArrayPath, 0, $pos)] = self::CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value); 695 } else { 696 $ReturnedArray[$ArrayPath] = $Value; 697 } 698 return $ReturnedArray; 699 } 700 701 /** 702 * @param array $arraydata 703 * @param bool $returnkey 704 * 705 * @return int|false 706 */ 707 public static function array_max($arraydata, $returnkey=false) { 708 $maxvalue = false; 709 $maxkey = false; 710 foreach ($arraydata as $key => $value) { 711 if (!is_array($value)) { 712 if (($maxvalue === false) || ($value > $maxvalue)) { 713 $maxvalue = $value; 714 $maxkey = $key; 715 } 716 } 717 } 718 return ($returnkey ? $maxkey : $maxvalue); 719 } 720 721 /** 722 * @param array $arraydata 723 * @param bool $returnkey 724 * 725 * @return int|false 726 */ 727 public static function array_min($arraydata, $returnkey=false) { 728 $minvalue = false; 729 $minkey = false; 730 foreach ($arraydata as $key => $value) { 731 if (!is_array($value)) { 732 if (($minvalue === false) || ($value < $minvalue)) { 733 $minvalue = $value; 734 $minkey = $key; 735 } 736 } 737 } 738 return ($returnkey ? $minkey : $minvalue); 739 } 740 741 /** 742 * @param string $XMLstring 743 * 744 * @return array|false 745 */ 746 public static function XML2array($XMLstring) { 747 if (function_exists('simplexml_load_string') && function_exists('libxml_disable_entity_loader')) { 748 // http://websec.io/2012/08/27/Preventing-XEE-in-PHP.html 749 // https://core.trac.wordpress.org/changeset/29378 750 // This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading is 751 // disabled by default, but is still needed when LIBXML_NOENT is used. 752 $loader = @libxml_disable_entity_loader(true); 753 $XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS); 754 $return = self::SimpleXMLelement2array($XMLobject); 755 @libxml_disable_entity_loader($loader); 756 return $return; 757 } 758 return false; 759 } 760 761 /** 762 * @param SimpleXMLElement|array|mixed $XMLobject 763 * 764 * @return mixed 765 */ 766 public static function SimpleXMLelement2array($XMLobject) { 767 if (!is_object($XMLobject) && !is_array($XMLobject)) { 768 return $XMLobject; 769 } 770 $XMLarray = $XMLobject instanceof SimpleXMLElement ? get_object_vars($XMLobject) : $XMLobject; 771 foreach ($XMLarray as $key => $value) { 772 $XMLarray[$key] = self::SimpleXMLelement2array($value); 773 } 774 return $XMLarray; 775 } 776 777 /** 778 * Returns checksum for a file from starting position to absolute end position. 779 * 780 * @param string $file 781 * @param int $offset 782 * @param int $end 783 * @param string $algorithm 784 * 785 * @return string|false 786 * @throws getid3_exception 787 */ 788 public static function hash_data($file, $offset, $end, $algorithm) { 789 if (!self::intValueSupported($end)) { 790 return false; 791 } 792 if (!in_array($algorithm, array('md5', 'sha1'))) { 793 throw new getid3_exception('Invalid algorithm ('.$algorithm.') in self::hash_data()'); 794 } 795 796 $size = $end - $offset; 797 798 $fp = fopen($file, 'rb'); 799 fseek($fp, $offset); 800 $ctx = hash_init($algorithm); 801 while ($size > 0) { 802 $buffer = fread($fp, min($size, getID3::FREAD_BUFFER_SIZE)); 803 hash_update($ctx, $buffer); 804 $size -= getID3::FREAD_BUFFER_SIZE; 805 } 806 $hash = hash_final($ctx); 807 fclose($fp); 808 809 return $hash; 810 } 811 812 /** 813 * @param string $filename_source 814 * @param string $filename_dest 815 * @param int $offset 816 * @param int $length 817 * 818 * @return bool 819 * @throws Exception 820 * 821 * @deprecated Unused, may be removed in future versions of getID3 822 */ 823 public static function CopyFileParts($filename_source, $filename_dest, $offset, $length) { 824 if (!self::intValueSupported($offset + $length)) { 825 throw new Exception('cannot copy file portion, it extends beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit'); 826 } 827 if (is_readable($filename_source) && is_file($filename_source) && ($fp_src = fopen($filename_source, 'rb'))) { 828 if (($fp_dest = fopen($filename_dest, 'wb'))) { 829 if (fseek($fp_src, $offset) == 0) { 830 $byteslefttowrite = $length; 831 while (($byteslefttowrite > 0) && ($buffer = fread($fp_src, min($byteslefttowrite, getID3::FREAD_BUFFER_SIZE)))) { 832 $byteswritten = fwrite($fp_dest, $buffer, $byteslefttowrite); 833 $byteslefttowrite -= $byteswritten; 834 } 835 fclose($fp_dest); 836 return true; 837 } else { 838 fclose($fp_src); 839 throw new Exception('failed to seek to offset '.$offset.' in '.$filename_source); 840 } 841 } else { 842 throw new Exception('failed to create file for writing '.$filename_dest); 843 } 844 } else { 845 throw new Exception('failed to open file for reading '.$filename_source); 846 } 847 } 848 849 /** 850 * @param int $charval 851 * 852 * @return string 853 */ 854 public static function iconv_fallback_int_utf8($charval) { 855 if ($charval < 128) { 856 // 0bbbbbbb 857 $newcharstring = chr($charval); 858 } elseif ($charval < 2048) { 859 // 110bbbbb 10bbbbbb 860 $newcharstring = chr(($charval >> 6) | 0xC0); 861 $newcharstring .= chr(($charval & 0x3F) | 0x80); 862 } elseif ($charval < 65536) { 863 // 1110bbbb 10bbbbbb 10bbbbbb 864 $newcharstring = chr(($charval >> 12) | 0xE0); 865 $newcharstring .= chr(($charval >> 6) | 0xC0); 866 $newcharstring .= chr(($charval & 0x3F) | 0x80); 867 } else { 868 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 869 $newcharstring = chr(($charval >> 18) | 0xF0); 870 $newcharstring .= chr(($charval >> 12) | 0xC0); 871 $newcharstring .= chr(($charval >> 6) | 0xC0); 872 $newcharstring .= chr(($charval & 0x3F) | 0x80); 873 } 874 return $newcharstring; 875 } 876 877 /** 878 * ISO-8859-1 => UTF-8 879 * 880 * @param string $string 881 * @param bool $bom 882 * 883 * @return string 884 */ 885 public static function iconv_fallback_iso88591_utf8($string, $bom=false) { 886 $newcharstring = ''; 887 if ($bom) { 888 $newcharstring .= "\xEF\xBB\xBF"; 889 } 890 for ($i = 0; $i < strlen($string); $i++) { 891 $charval = ord($string[$i]); 892 $newcharstring .= self::iconv_fallback_int_utf8($charval); 893 } 894 return $newcharstring; 895 } 896 897 /** 898 * ISO-8859-1 => UTF-16BE 899 * 900 * @param string $string 901 * @param bool $bom 902 * 903 * @return string 904 */ 905 public static function iconv_fallback_iso88591_utf16be($string, $bom=false) { 906 $newcharstring = ''; 907 if ($bom) { 908 $newcharstring .= "\xFE\xFF"; 909 } 910 for ($i = 0; $i < strlen($string); $i++) { 911 $newcharstring .= "\x00".$string[$i]; 912 } 913 return $newcharstring; 914 } 915 916 /** 917 * ISO-8859-1 => UTF-16LE 918 * 919 * @param string $string 920 * @param bool $bom 921 * 922 * @return string 923 */ 924 public static function iconv_fallback_iso88591_utf16le($string, $bom=false) { 925 $newcharstring = ''; 926 if ($bom) { 927 $newcharstring .= "\xFF\xFE"; 928 } 929 for ($i = 0; $i < strlen($string); $i++) { 930 $newcharstring .= $string[$i]."\x00"; 931 } 932 return $newcharstring; 933 } 934 935 /** 936 * ISO-8859-1 => UTF-16LE (BOM) 937 * 938 * @param string $string 939 * 940 * @return string 941 */ 942 public static function iconv_fallback_iso88591_utf16($string) { 943 return self::iconv_fallback_iso88591_utf16le($string, true); 944 } 945 946 /** 947 * UTF-8 => ISO-8859-1 948 * 949 * @param string $string 950 * 951 * @return string 952 */ 953 public static function iconv_fallback_utf8_iso88591($string) { 954 $newcharstring = ''; 955 $offset = 0; 956 $stringlength = strlen($string); 957 while ($offset < $stringlength) { 958 if ((ord($string[$offset]) | 0x07) == 0xF7) { 959 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 960 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 961 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 962 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 963 (ord($string[($offset + 3)]) & 0x3F); 964 $offset += 4; 965 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 966 // 1110bbbb 10bbbbbb 10bbbbbb 967 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 968 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 969 (ord($string[($offset + 2)]) & 0x3F); 970 $offset += 3; 971 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 972 // 110bbbbb 10bbbbbb 973 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 974 (ord($string[($offset + 1)]) & 0x3F); 975 $offset += 2; 976 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 977 // 0bbbbbbb 978 $charval = ord($string[$offset]); 979 $offset += 1; 980 } else { 981 // error? throw some kind of warning here? 982 $charval = false; 983 $offset += 1; 984 } 985 if ($charval !== false) { 986 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 987 } 988 } 989 return $newcharstring; 990 } 991 992 /** 993 * UTF-8 => UTF-16BE 994 * 995 * @param string $string 996 * @param bool $bom 997 * 998 * @return string 999 */ 1000 public static function iconv_fallback_utf8_utf16be($string, $bom=false) { 1001 $newcharstring = ''; 1002 if ($bom) { 1003 $newcharstring .= "\xFE\xFF"; 1004 } 1005 $offset = 0; 1006 $stringlength = strlen($string); 1007 while ($offset < $stringlength) { 1008 if ((ord($string[$offset]) | 0x07) == 0xF7) { 1009 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 1010 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 1011 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 1012 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 1013 (ord($string[($offset + 3)]) & 0x3F); 1014 $offset += 4; 1015 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 1016 // 1110bbbb 10bbbbbb 10bbbbbb 1017 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 1018 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 1019 (ord($string[($offset + 2)]) & 0x3F); 1020 $offset += 3; 1021 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 1022 // 110bbbbb 10bbbbbb 1023 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 1024 (ord($string[($offset + 1)]) & 0x3F); 1025 $offset += 2; 1026 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 1027 // 0bbbbbbb 1028 $charval = ord($string[$offset]); 1029 $offset += 1; 1030 } else { 1031 // error? throw some kind of warning here? 1032 $charval = false; 1033 $offset += 1; 1034 } 1035 if ($charval !== false) { 1036 $newcharstring .= (($charval < 65536) ? self::BigEndian2String($charval, 2) : "\x00".'?'); 1037 } 1038 } 1039 return $newcharstring; 1040 } 1041 1042 /** 1043 * UTF-8 => UTF-16LE 1044 * 1045 * @param string $string 1046 * @param bool $bom 1047 * 1048 * @return string 1049 */ 1050 public static function iconv_fallback_utf8_utf16le($string, $bom=false) { 1051 $newcharstring = ''; 1052 if ($bom) { 1053 $newcharstring .= "\xFF\xFE"; 1054 } 1055 $offset = 0; 1056 $stringlength = strlen($string); 1057 while ($offset < $stringlength) { 1058 if ((ord($string[$offset]) | 0x07) == 0xF7) { 1059 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 1060 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 1061 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 1062 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 1063 (ord($string[($offset + 3)]) & 0x3F); 1064 $offset += 4; 1065 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 1066 // 1110bbbb 10bbbbbb 10bbbbbb 1067 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 1068 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 1069 (ord($string[($offset + 2)]) & 0x3F); 1070 $offset += 3; 1071 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 1072 // 110bbbbb 10bbbbbb 1073 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 1074 (ord($string[($offset + 1)]) & 0x3F); 1075 $offset += 2; 1076 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 1077 // 0bbbbbbb 1078 $charval = ord($string[$offset]); 1079 $offset += 1; 1080 } else { 1081 // error? maybe throw some warning here? 1082 $charval = false; 1083 $offset += 1; 1084 } 1085 if ($charval !== false) { 1086 $newcharstring .= (($charval < 65536) ? self::LittleEndian2String($charval, 2) : '?'."\x00"); 1087 } 1088 } 1089 return $newcharstring; 1090 } 1091 1092 /** 1093 * UTF-8 => UTF-16LE (BOM) 1094 * 1095 * @param string $string 1096 * 1097 * @return string 1098 */ 1099 public static function iconv_fallback_utf8_utf16($string) { 1100 return self::iconv_fallback_utf8_utf16le($string, true); 1101 } 1102 1103 /** 1104 * UTF-16BE => UTF-8 1105 * 1106 * @param string $string 1107 * 1108 * @return string 1109 */ 1110 public static function iconv_fallback_utf16be_utf8($string) { 1111 if (substr($string, 0, 2) == "\xFE\xFF") { 1112 // strip BOM 1113 $string = substr($string, 2); 1114 } 1115 $newcharstring = ''; 1116 for ($i = 0; $i < strlen($string); $i += 2) { 1117 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1118 $newcharstring .= self::iconv_fallback_int_utf8($charval); 1119 } 1120 return $newcharstring; 1121 } 1122 1123 /** 1124 * UTF-16LE => UTF-8 1125 * 1126 * @param string $string 1127 * 1128 * @return string 1129 */ 1130 public static function iconv_fallback_utf16le_utf8($string) { 1131 if (substr($string, 0, 2) == "\xFF\xFE") { 1132 // strip BOM 1133 $string = substr($string, 2); 1134 } 1135 $newcharstring = ''; 1136 for ($i = 0; $i < strlen($string); $i += 2) { 1137 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1138 $newcharstring .= self::iconv_fallback_int_utf8($charval); 1139 } 1140 return $newcharstring; 1141 } 1142 1143 /** 1144 * UTF-16BE => ISO-8859-1 1145 * 1146 * @param string $string 1147 * 1148 * @return string 1149 */ 1150 public static function iconv_fallback_utf16be_iso88591($string) { 1151 if (substr($string, 0, 2) == "\xFE\xFF") { 1152 // strip BOM 1153 $string = substr($string, 2); 1154 } 1155 $newcharstring = ''; 1156 for ($i = 0; $i < strlen($string); $i += 2) { 1157 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1158 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1159 } 1160 return $newcharstring; 1161 } 1162 1163 /** 1164 * UTF-16LE => ISO-8859-1 1165 * 1166 * @param string $string 1167 * 1168 * @return string 1169 */ 1170 public static function iconv_fallback_utf16le_iso88591($string) { 1171 if (substr($string, 0, 2) == "\xFF\xFE") { 1172 // strip BOM 1173 $string = substr($string, 2); 1174 } 1175 $newcharstring = ''; 1176 for ($i = 0; $i < strlen($string); $i += 2) { 1177 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1178 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1179 } 1180 return $newcharstring; 1181 } 1182 1183 /** 1184 * UTF-16 (BOM) => ISO-8859-1 1185 * 1186 * @param string $string 1187 * 1188 * @return string 1189 */ 1190 public static function iconv_fallback_utf16_iso88591($string) { 1191 $bom = substr($string, 0, 2); 1192 if ($bom == "\xFE\xFF") { 1193 return self::iconv_fallback_utf16be_iso88591(substr($string, 2)); 1194 } elseif ($bom == "\xFF\xFE") { 1195 return self::iconv_fallback_utf16le_iso88591(substr($string, 2)); 1196 } 1197 return $string; 1198 } 1199 1200 /** 1201 * UTF-16 (BOM) => UTF-8 1202 * 1203 * @param string $string 1204 * 1205 * @return string 1206 */ 1207 public static function iconv_fallback_utf16_utf8($string) { 1208 $bom = substr($string, 0, 2); 1209 if ($bom == "\xFE\xFF") { 1210 return self::iconv_fallback_utf16be_utf8(substr($string, 2)); 1211 } elseif ($bom == "\xFF\xFE") { 1212 return self::iconv_fallback_utf16le_utf8(substr($string, 2)); 1213 } 1214 return $string; 1215 } 1216 1217 /** 1218 * @param string $in_charset 1219 * @param string $out_charset 1220 * @param string $string 1221 * 1222 * @return string 1223 * @throws Exception 1224 */ 1225 public static function iconv_fallback($in_charset, $out_charset, $string) { 1226 1227 if ($in_charset == $out_charset) { 1228 return $string; 1229 } 1230 1231 // mb_convert_encoding() available 1232 if (function_exists('mb_convert_encoding')) { 1233 if ((strtoupper($in_charset) == 'UTF-16') && (substr($string, 0, 2) != "\xFE\xFF") && (substr($string, 0, 2) != "\xFF\xFE")) { 1234 // if BOM missing, mb_convert_encoding will mishandle the conversion, assume UTF-16BE and prepend appropriate BOM 1235 $string = "\xFF\xFE".$string; 1236 } 1237 if ((strtoupper($in_charset) == 'UTF-16') && (strtoupper($out_charset) == 'UTF-8')) { 1238 if (($string == "\xFF\xFE") || ($string == "\xFE\xFF")) { 1239 // if string consists of only BOM, mb_convert_encoding will return the BOM unmodified 1240 return ''; 1241 } 1242 } 1243 if ($converted_string = @mb_convert_encoding($string, $out_charset, $in_charset)) { 1244 switch ($out_charset) { 1245 case 'ISO-8859-1': 1246 $converted_string = rtrim($converted_string, "\x00"); 1247 break; 1248 } 1249 return $converted_string; 1250 } 1251 return $string; 1252 1253 // iconv() available 1254 } elseif (function_exists('iconv')) { 1255 if ($converted_string = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) { 1256 switch ($out_charset) { 1257 case 'ISO-8859-1': 1258 $converted_string = rtrim($converted_string, "\x00"); 1259 break; 1260 } 1261 return $converted_string; 1262 } 1263 1264 // iconv() may sometimes fail with "illegal character in input string" error message 1265 // and return an empty string, but returning the unconverted string is more useful 1266 return $string; 1267 } 1268 1269 1270 // neither mb_convert_encoding or iconv() is available 1271 static $ConversionFunctionList = array(); 1272 if (empty($ConversionFunctionList)) { 1273 $ConversionFunctionList['ISO-8859-1']['UTF-8'] = 'iconv_fallback_iso88591_utf8'; 1274 $ConversionFunctionList['ISO-8859-1']['UTF-16'] = 'iconv_fallback_iso88591_utf16'; 1275 $ConversionFunctionList['ISO-8859-1']['UTF-16BE'] = 'iconv_fallback_iso88591_utf16be'; 1276 $ConversionFunctionList['ISO-8859-1']['UTF-16LE'] = 'iconv_fallback_iso88591_utf16le'; 1277 $ConversionFunctionList['UTF-8']['ISO-8859-1'] = 'iconv_fallback_utf8_iso88591'; 1278 $ConversionFunctionList['UTF-8']['UTF-16'] = 'iconv_fallback_utf8_utf16'; 1279 $ConversionFunctionList['UTF-8']['UTF-16BE'] = 'iconv_fallback_utf8_utf16be'; 1280 $ConversionFunctionList['UTF-8']['UTF-16LE'] = 'iconv_fallback_utf8_utf16le'; 1281 $ConversionFunctionList['UTF-16']['ISO-8859-1'] = 'iconv_fallback_utf16_iso88591'; 1282 $ConversionFunctionList['UTF-16']['UTF-8'] = 'iconv_fallback_utf16_utf8'; 1283 $ConversionFunctionList['UTF-16LE']['ISO-8859-1'] = 'iconv_fallback_utf16le_iso88591'; 1284 $ConversionFunctionList['UTF-16LE']['UTF-8'] = 'iconv_fallback_utf16le_utf8'; 1285 $ConversionFunctionList['UTF-16BE']['ISO-8859-1'] = 'iconv_fallback_utf16be_iso88591'; 1286 $ConversionFunctionList['UTF-16BE']['UTF-8'] = 'iconv_fallback_utf16be_utf8'; 1287 } 1288 if (isset($ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)])) { 1289 $ConversionFunction = $ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)]; 1290 return self::$ConversionFunction($string); 1291 } 1292 throw new Exception('PHP does not has mb_convert_encoding() or iconv() support - cannot convert from '.$in_charset.' to '.$out_charset); 1293 } 1294 1295 /** 1296 * @param mixed $data 1297 * @param string $charset 1298 * 1299 * @return mixed 1300 */ 1301 public static function recursiveMultiByteCharString2HTML($data, $charset='ISO-8859-1') { 1302 if (is_string($data)) { 1303 return self::MultiByteCharString2HTML($data, $charset); 1304 } elseif (is_array($data)) { 1305 $return_data = array(); 1306 foreach ($data as $key => $value) { 1307 $return_data[$key] = self::recursiveMultiByteCharString2HTML($value, $charset); 1308 } 1309 return $return_data; 1310 } 1311 // integer, float, objects, resources, etc 1312 return $data; 1313 } 1314 1315 /** 1316 * @param string|int|float $string 1317 * @param string $charset 1318 * 1319 * @return string 1320 */ 1321 public static function MultiByteCharString2HTML($string, $charset='ISO-8859-1') { 1322 $string = (string) $string; // in case trying to pass a numeric (float, int) string, would otherwise return an empty string 1323 $HTMLstring = ''; 1324 1325 switch (strtolower($charset)) { 1326 case '1251': 1327 case '1252': 1328 case '866': 1329 case '932': 1330 case '936': 1331 case '950': 1332 case 'big5': 1333 case 'big5-hkscs': 1334 case 'cp1251': 1335 case 'cp1252': 1336 case 'cp866': 1337 case 'euc-jp': 1338 case 'eucjp': 1339 case 'gb2312': 1340 case 'ibm866': 1341 case 'iso-8859-1': 1342 case 'iso-8859-15': 1343 case 'iso8859-1': 1344 case 'iso8859-15': 1345 case 'koi8-r': 1346 case 'koi8-ru': 1347 case 'koi8r': 1348 case 'shift_jis': 1349 case 'sjis': 1350 case 'win-1251': 1351 case 'windows-1251': 1352 case 'windows-1252': 1353 $HTMLstring = htmlentities($string, ENT_COMPAT, $charset); 1354 break; 1355 1356 case 'utf-8': 1357 $strlen = strlen($string); 1358 for ($i = 0; $i < $strlen; $i++) { 1359 $char_ord_val = ord($string[$i]); 1360 $charval = 0; 1361 if ($char_ord_val < 0x80) { 1362 $charval = $char_ord_val; 1363 } elseif ((($char_ord_val & 0xF0) >> 4) == 0x0F && $i+3 < $strlen) { 1364 $charval = (($char_ord_val & 0x07) << 18); 1365 $charval += ((ord($string[++$i]) & 0x3F) << 12); 1366 $charval += ((ord($string[++$i]) & 0x3F) << 6); 1367 $charval += (ord($string[++$i]) & 0x3F); 1368 } elseif ((($char_ord_val & 0xE0) >> 5) == 0x07 && $i+2 < $strlen) { 1369 $charval = (($char_ord_val & 0x0F) << 12); 1370 $charval += ((ord($string[++$i]) & 0x3F) << 6); 1371 $charval += (ord($string[++$i]) & 0x3F); 1372 } elseif ((($char_ord_val & 0xC0) >> 6) == 0x03 && $i+1 < $strlen) { 1373 $charval = (($char_ord_val & 0x1F) << 6); 1374 $charval += (ord($string[++$i]) & 0x3F); 1375 } 1376 if (($charval >= 32) && ($charval <= 127)) { 1377 $HTMLstring .= htmlentities(chr($charval)); 1378 } else { 1379 $HTMLstring .= '&#'.$charval.';'; 1380 } 1381 } 1382 break; 1383 1384 case 'utf-16le': 1385 for ($i = 0; $i < strlen($string); $i += 2) { 1386 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1387 if (($charval >= 32) && ($charval <= 127)) { 1388 $HTMLstring .= chr($charval); 1389 } else { 1390 $HTMLstring .= '&#'.$charval.';'; 1391 } 1392 } 1393 break; 1394 1395 case 'utf-16be': 1396 for ($i = 0; $i < strlen($string); $i += 2) { 1397 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1398 if (($charval >= 32) && ($charval <= 127)) { 1399 $HTMLstring .= chr($charval); 1400 } else { 1401 $HTMLstring .= '&#'.$charval.';'; 1402 } 1403 } 1404 break; 1405 1406 default: 1407 $HTMLstring = 'ERROR: Character set "'.$charset.'" not supported in MultiByteCharString2HTML()'; 1408 break; 1409 } 1410 return $HTMLstring; 1411 } 1412 1413 /** 1414 * @param int $namecode 1415 * 1416 * @return string 1417 */ 1418 public static function RGADnameLookup($namecode) { 1419 static $RGADname = array(); 1420 if (empty($RGADname)) { 1421 $RGADname[0] = 'not set'; 1422 $RGADname[1] = 'Track Gain Adjustment'; 1423 $RGADname[2] = 'Album Gain Adjustment'; 1424 } 1425 1426 return (isset($RGADname[$namecode]) ? $RGADname[$namecode] : ''); 1427 } 1428 1429 /** 1430 * @param int $originatorcode 1431 * 1432 * @return string 1433 */ 1434 public static function RGADoriginatorLookup($originatorcode) { 1435 static $RGADoriginator = array(); 1436 if (empty($RGADoriginator)) { 1437 $RGADoriginator[0] = 'unspecified'; 1438 $RGADoriginator[1] = 'pre-set by artist/producer/mastering engineer'; 1439 $RGADoriginator[2] = 'set by user'; 1440 $RGADoriginator[3] = 'determined automatically'; 1441 } 1442 1443 return (isset($RGADoriginator[$originatorcode]) ? $RGADoriginator[$originatorcode] : ''); 1444 } 1445 1446 /** 1447 * @param int $rawadjustment 1448 * @param int $signbit 1449 * 1450 * @return float 1451 */ 1452 public static function RGADadjustmentLookup($rawadjustment, $signbit) { 1453 $adjustment = (float) $rawadjustment / 10; 1454 if ($signbit == 1) { 1455 $adjustment *= -1; 1456 } 1457 return $adjustment; 1458 } 1459 1460 /** 1461 * @param int $namecode 1462 * @param int $originatorcode 1463 * @param int $replaygain 1464 * 1465 * @return string 1466 */ 1467 public static function RGADgainString($namecode, $originatorcode, $replaygain) { 1468 if ($replaygain < 0) { 1469 $signbit = '1'; 1470 } else { 1471 $signbit = '0'; 1472 } 1473 $storedreplaygain = intval(round($replaygain * 10)); 1474 $gainstring = str_pad(decbin($namecode), 3, '0', STR_PAD_LEFT); 1475 $gainstring .= str_pad(decbin($originatorcode), 3, '0', STR_PAD_LEFT); 1476 $gainstring .= $signbit; 1477 $gainstring .= str_pad(decbin($storedreplaygain), 9, '0', STR_PAD_LEFT); 1478 1479 return $gainstring; 1480 } 1481 1482 /** 1483 * @param float $amplitude 1484 * 1485 * @return float 1486 */ 1487 public static function RGADamplitude2dB($amplitude) { 1488 return 20 * log10($amplitude); 1489 } 1490 1491 /** 1492 * @param string $imgData 1493 * @param array $imageinfo 1494 * 1495 * @return array|false 1496 */ 1497 public static function GetDataImageSize($imgData, &$imageinfo=array()) { 1498 if (PHP_VERSION_ID >= 50400) { 1499 $GetDataImageSize = @getimagesizefromstring($imgData, $imageinfo); 1500 if ($GetDataImageSize === false || !isset($GetDataImageSize[0], $GetDataImageSize[1])) { 1501 return false; 1502 } 1503 $GetDataImageSize['height'] = $GetDataImageSize[0]; 1504 $GetDataImageSize['width'] = $GetDataImageSize[1]; 1505 return $GetDataImageSize; 1506 } 1507 static $tempdir = ''; 1508 if (empty($tempdir)) { 1509 if (function_exists('sys_get_temp_dir')) { 1510 $tempdir = sys_get_temp_dir(); // https://github.com/JamesHeinrich/getID3/issues/52 1511 } 1512 1513 // yes this is ugly, feel free to suggest a better way 1514 if (include_once(dirname(__FILE__).'/getid3.php')) { 1515 $getid3_temp = new getID3(); 1516 if ($getid3_temp_tempdir = $getid3_temp->tempdir) { 1517 $tempdir = $getid3_temp_tempdir; 1518 } 1519 unset($getid3_temp, $getid3_temp_tempdir); 1520 } 1521 } 1522 $GetDataImageSize = false; 1523 if ($tempfilename = tempnam($tempdir, 'gI3')) { 1524 if (is_writable($tempfilename) && is_file($tempfilename) && ($tmp = fopen($tempfilename, 'wb'))) { 1525 fwrite($tmp, $imgData); 1526 fclose($tmp); 1527 $GetDataImageSize = @getimagesize($tempfilename, $imageinfo); 1528 if (($GetDataImageSize === false) || !isset($GetDataImageSize[0]) || !isset($GetDataImageSize[1])) { 1529 return false; 1530 } 1531 $GetDataImageSize['height'] = $GetDataImageSize[0]; 1532 $GetDataImageSize['width'] = $GetDataImageSize[1]; 1533 } 1534 unlink($tempfilename); 1535 } 1536 return $GetDataImageSize; 1537 } 1538 1539 /** 1540 * @param string $mime_type 1541 * 1542 * @return string 1543 */ 1544 public static function ImageExtFromMime($mime_type) { 1545 // temporary way, works OK for now, but should be reworked in the future 1546 return str_replace(array('image/', 'x-', 'jpeg'), array('', '', 'jpg'), $mime_type); 1547 } 1548 1549 /** 1550 * @param array $ThisFileInfo 1551 * @param bool $option_tags_html default true (just as in the main getID3 class) 1552 * 1553 * @return bool 1554 */ 1555 public static function CopyTagsToComments(&$ThisFileInfo, $option_tags_html=true) { 1556 // Copy all entries from ['tags'] into common ['comments'] 1557 if (!empty($ThisFileInfo['tags'])) { 1558 1559 // Some tag types can only support limited character sets and may contain data in non-standard encoding (usually ID3v1) 1560 // and/or poorly-transliterated tag values that are also in tag formats that do support full-range character sets 1561 // To make the output more user-friendly, process the potentially-problematic tag formats last to enhance the chance that 1562 // the first entries in [comments] are the most correct and the "bad" ones (if any) come later. 1563 // https://github.com/JamesHeinrich/getID3/issues/338 1564 $processLastTagTypes = array('id3v1','riff'); 1565 foreach ($processLastTagTypes as $processLastTagType) { 1566 if (isset($ThisFileInfo['tags'][$processLastTagType])) { 1567 // bubble ID3v1 to the end, if present to aid in detecting bad ID3v1 encodings 1568 $temp = $ThisFileInfo['tags'][$processLastTagType]; 1569 unset($ThisFileInfo['tags'][$processLastTagType]); 1570 $ThisFileInfo['tags'][$processLastTagType] = $temp; 1571 unset($temp); 1572 } 1573 } 1574 foreach ($ThisFileInfo['tags'] as $tagtype => $tagarray) { 1575 foreach ($tagarray as $tagname => $tagdata) { 1576 foreach ($tagdata as $key => $value) { 1577 if (!empty($value)) { 1578 if (empty($ThisFileInfo['comments'][$tagname])) { 1579 1580 // fall through and append value 1581 1582 } elseif ($tagtype == 'id3v1') { 1583 1584 $newvaluelength = strlen(trim($value)); 1585 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) { 1586 $oldvaluelength = strlen(trim($existingvalue)); 1587 if (($newvaluelength <= $oldvaluelength) && (substr($existingvalue, 0, $newvaluelength) == trim($value))) { 1588 // new value is identical but shorter-than (or equal-length to) one already in comments - skip 1589 break 2; 1590 } 1591 1592 if (function_exists('mb_convert_encoding')) { 1593 if (trim($value) == trim(substr(mb_convert_encoding($existingvalue, $ThisFileInfo['id3v1']['encoding'], $ThisFileInfo['encoding']), 0, 30))) { 1594 // value stored in ID3v1 appears to be probably the multibyte value transliterated (badly) into ISO-8859-1 in ID3v1. 1595 // As an example, Foobar2000 will do this if you tag a file with Chinese or Arabic or Cyrillic or something that doesn't fit into ISO-8859-1 the ID3v1 will consist of mostly "?" characters, one per multibyte unrepresentable character 1596 break 2; 1597 } 1598 } 1599 } 1600 1601 } elseif (!is_array($value)) { 1602 1603 $newvaluelength = strlen(trim($value)); 1604 $newvaluelengthMB = mb_strlen(trim($value)); 1605 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) { 1606 $oldvaluelength = strlen(trim($existingvalue)); 1607 $oldvaluelengthMB = mb_strlen(trim($existingvalue)); 1608 if (($newvaluelengthMB == $oldvaluelengthMB) && ($existingvalue == getid3_lib::iconv_fallback('UTF-8', 'ASCII', $value))) { 1609 // https://github.com/JamesHeinrich/getID3/issues/338 1610 // check for tags containing extended characters that may have been forced into limited-character storage (e.g. UTF8 values into ASCII) 1611 // which will usually display unrepresentable characters as "?" 1612 $ThisFileInfo['comments'][$tagname][$existingkey] = trim($value); 1613 break; 1614 } 1615 if ((strlen($existingvalue) > 10) && ($newvaluelength > $oldvaluelength) && (substr(trim($value), 0, strlen($existingvalue)) == $existingvalue)) { 1616 $ThisFileInfo['comments'][$tagname][$existingkey] = trim($value); 1617 break; 1618 } 1619 } 1620 1621 } 1622 if (is_array($value) || empty($ThisFileInfo['comments'][$tagname]) || !in_array(trim($value), $ThisFileInfo['comments'][$tagname])) { 1623 $value = (is_string($value) ? trim($value) : $value); 1624 if (!is_int($key) && !ctype_digit($key)) { 1625 $ThisFileInfo['comments'][$tagname][$key] = $value; 1626 } else { 1627 if (!isset($ThisFileInfo['comments'][$tagname])) { 1628 $ThisFileInfo['comments'][$tagname] = array($value); 1629 } else { 1630 $ThisFileInfo['comments'][$tagname][] = $value; 1631 } 1632 } 1633 } 1634 } 1635 } 1636 } 1637 } 1638 1639 // attempt to standardize spelling of returned keys 1640 if (!empty($ThisFileInfo['comments'])) { 1641 $StandardizeFieldNames = array( 1642 'tracknumber' => 'track_number', 1643 'track' => 'track_number', 1644 ); 1645 foreach ($StandardizeFieldNames as $badkey => $goodkey) { 1646 if (array_key_exists($badkey, $ThisFileInfo['comments']) && !array_key_exists($goodkey, $ThisFileInfo['comments'])) { 1647 $ThisFileInfo['comments'][$goodkey] = $ThisFileInfo['comments'][$badkey]; 1648 unset($ThisFileInfo['comments'][$badkey]); 1649 } 1650 } 1651 } 1652 1653 if ($option_tags_html) { 1654 // Copy ['comments'] to ['comments_html'] 1655 if (!empty($ThisFileInfo['comments'])) { 1656 foreach ($ThisFileInfo['comments'] as $field => $values) { 1657 if ($field == 'picture') { 1658 // pictures can take up a lot of space, and we don't need multiple copies of them 1659 // let there be a single copy in [comments][picture], and not elsewhere 1660 continue; 1661 } 1662 foreach ($values as $index => $value) { 1663 if (is_array($value)) { 1664 $ThisFileInfo['comments_html'][$field][$index] = $value; 1665 } else { 1666 $ThisFileInfo['comments_html'][$field][$index] = str_replace('�', '', self::MultiByteCharString2HTML($value, $ThisFileInfo['encoding'])); 1667 } 1668 } 1669 } 1670 } 1671 } 1672 1673 } 1674 return true; 1675 } 1676 1677 /** 1678 * @param string $key 1679 * @param int $begin 1680 * @param int $end 1681 * @param string $file 1682 * @param string $name 1683 * 1684 * @return string 1685 */ 1686 public static function EmbeddedLookup($key, $begin, $end, $file, $name) { 1687 1688 // Cached 1689 static $cache; 1690 if (isset($cache[$file][$name])) { 1691 return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : ''); 1692 } 1693 1694 // Init 1695 $keylength = strlen($key); 1696 $line_count = $end - $begin - 7; 1697 1698 // Open php file 1699 $fp = fopen($file, 'r'); 1700 1701 // Discard $begin lines 1702 for ($i = 0; $i < ($begin + 3); $i++) { 1703 fgets($fp, 1024); 1704 } 1705 1706 // Loop thru line 1707 while (0 < $line_count--) { 1708 1709 // Read line 1710 $line = ltrim(fgets($fp, 1024), "\t "); 1711 1712 // METHOD A: only cache the matching key - less memory but slower on next lookup of not-previously-looked-up key 1713 //$keycheck = substr($line, 0, $keylength); 1714 //if ($key == $keycheck) { 1715 // $cache[$file][$name][$keycheck] = substr($line, $keylength + 1); 1716 // break; 1717 //} 1718 1719 // METHOD B: cache all keys in this lookup - more memory but faster on next lookup of not-previously-looked-up key 1720 //$cache[$file][$name][substr($line, 0, $keylength)] = trim(substr($line, $keylength + 1)); 1721 $explodedLine = explode("\t", $line, 2); 1722 $ThisKey = (isset($explodedLine[0]) ? $explodedLine[0] : ''); 1723 $ThisValue = (isset($explodedLine[1]) ? $explodedLine[1] : ''); 1724 $cache[$file][$name][$ThisKey] = trim($ThisValue); 1725 } 1726 1727 // Close and return 1728 fclose($fp); 1729 return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : ''); 1730 } 1731 1732 /** 1733 * @param string $filename 1734 * @param string $sourcefile 1735 * @param bool $DieOnFailure 1736 * 1737 * @return bool 1738 * @throws Exception 1739 */ 1740 public static function IncludeDependency($filename, $sourcefile, $DieOnFailure=false) { 1741 global $GETID3_ERRORARRAY; 1742 1743 if (file_exists($filename)) { 1744 if (include_once($filename)) { 1745 return true; 1746 } else { 1747 $diemessage = basename($sourcefile).' depends on '.$filename.', which has errors'; 1748 } 1749 } else { 1750 $diemessage = basename($sourcefile).' depends on '.$filename.', which is missing'; 1751 } 1752 if ($DieOnFailure) { 1753 throw new Exception($diemessage); 1754 } else { 1755 $GETID3_ERRORARRAY[] = $diemessage; 1756 } 1757 return false; 1758 } 1759 1760 /** 1761 * @param string $string 1762 * 1763 * @return string 1764 */ 1765 public static function trimNullByte($string) { 1766 return trim($string, "\x00"); 1767 } 1768 1769 /** 1770 * @param string $path 1771 * 1772 * @return float|bool 1773 */ 1774 public static function getFileSizeSyscall($path) { 1775 $commandline = null; 1776 $filesize = false; 1777 1778 if (GETID3_OS_ISWINDOWS) { 1779 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: 1780 $filesystem = new COM('Scripting.FileSystemObject'); 1781 $file = $filesystem->GetFile($path); 1782 $filesize = $file->Size(); 1783 unset($filesystem, $file); 1784 } else { 1785 $commandline = 'for %I in ('.escapeshellarg($path).') do @echo %~zI'; 1786 } 1787 } else { 1788 $commandline = 'ls -l '.escapeshellarg($path).' | awk \'{print $5}\''; 1789 } 1790 if (isset($commandline)) { 1791 $output = trim(`$commandline`); 1792 if (ctype_digit($output)) { 1793 $filesize = (float) $output; 1794 } 1795 } 1796 return $filesize; 1797 } 1798 1799 /** 1800 * @param string $filename 1801 * 1802 * @return string|false 1803 */ 1804 public static function truepath($filename) { 1805 // 2017-11-08: this could use some improvement, patches welcome 1806 if (preg_match('#^(\\\\\\\\|//)[a-z0-9]#i', $filename, $matches)) { 1807 // PHP's built-in realpath function does not work on UNC Windows shares 1808 $goodpath = array(); 1809 foreach (explode('/', str_replace('\\', '/', $filename)) as $part) { 1810 if ($part == '.') { 1811 continue; 1812 } 1813 if ($part == '..') { 1814 if (count($goodpath)) { 1815 array_pop($goodpath); 1816 } else { 1817 // cannot step above this level, already at top level 1818 return false; 1819 } 1820 } else { 1821 $goodpath[] = $part; 1822 } 1823 } 1824 return implode(DIRECTORY_SEPARATOR, $goodpath); 1825 } 1826 return realpath($filename); 1827 } 1828 1829 /** 1830 * Workaround for Bug #37268 (https://bugs.php.net/bug.php?id=37268) 1831 * 1832 * @param string $path A path. 1833 * @param string $suffix If the name component ends in suffix this will also be cut off. 1834 * 1835 * @return string 1836 */ 1837 public static function mb_basename($path, $suffix = '') { 1838 $splited = preg_split('#/#', rtrim($path, '/ ')); 1839 return substr(basename('X'.$splited[count($splited) - 1], $suffix), 1); 1840 } 1841 1842 }
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| Generated : Sat Dec 21 08:20:01 2024 | Cross-referenced by PHPXref |