| [ Index ] |
PHP Cross Reference of WordPress Trunk (Updated Daily) |
[Summary view] [Print] [Text view]
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 $XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS); 751 $return = self::SimpleXMLelement2array($XMLobject); 752 @libxml_disable_entity_loader($loader); 753 return $return; 754 } 755 } else { 756 $allow = false; 757 if (defined('LIBXML_VERSION') && (LIBXML_VERSION >= 20900)) { 758 // https://www.php.net/manual/en/function.libxml-disable-entity-loader.php 759 // "as of libxml 2.9.0 entity substitution is disabled by default, so there is no need to disable the loading 760 // of external entities, unless there is the need to resolve internal entity references with LIBXML_NOENT." 761 $allow = true; 762 } elseif (function_exists('libxml_set_external_entity_loader')) { 763 libxml_set_external_entity_loader(function () { return null; }); // https://www.zend.com/blog/cve-2023-3823 764 $allow = true; 765 } 766 if ($allow) { 767 $XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS); 768 $return = self::SimpleXMLelement2array($XMLobject); 769 return $return; 770 } 771 } 772 } 773 return false; 774 } 775 776 /** 777 * @param SimpleXMLElement|array|mixed $XMLobject 778 * 779 * @return mixed 780 */ 781 public static function SimpleXMLelement2array($XMLobject) { 782 if (!is_object($XMLobject) && !is_array($XMLobject)) { 783 return $XMLobject; 784 } 785 $XMLarray = $XMLobject instanceof SimpleXMLElement ? get_object_vars($XMLobject) : $XMLobject; 786 foreach ($XMLarray as $key => $value) { 787 $XMLarray[$key] = self::SimpleXMLelement2array($value); 788 } 789 return $XMLarray; 790 } 791 792 /** 793 * Returns checksum for a file from starting position to absolute end position. 794 * 795 * @param string $file 796 * @param int $offset 797 * @param int $end 798 * @param string $algorithm 799 * 800 * @return string|false 801 * @throws getid3_exception 802 */ 803 public static function hash_data($file, $offset, $end, $algorithm) { 804 if (!self::intValueSupported($end)) { 805 return false; 806 } 807 if (!in_array($algorithm, array('md5', 'sha1'))) { 808 throw new getid3_exception('Invalid algorithm ('.$algorithm.') in self::hash_data()'); 809 } 810 811 $size = $end - $offset; 812 813 $fp = fopen($file, 'rb'); 814 fseek($fp, $offset); 815 $ctx = hash_init($algorithm); 816 while ($size > 0) { 817 $buffer = fread($fp, min($size, getID3::FREAD_BUFFER_SIZE)); 818 hash_update($ctx, $buffer); 819 $size -= getID3::FREAD_BUFFER_SIZE; 820 } 821 $hash = hash_final($ctx); 822 fclose($fp); 823 824 return $hash; 825 } 826 827 /** 828 * @param string $filename_source 829 * @param string $filename_dest 830 * @param int $offset 831 * @param int $length 832 * 833 * @return bool 834 * @throws Exception 835 * 836 * @deprecated Unused, may be removed in future versions of getID3 837 */ 838 public static function CopyFileParts($filename_source, $filename_dest, $offset, $length) { 839 if (!self::intValueSupported($offset + $length)) { 840 throw new Exception('cannot copy file portion, it extends beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit'); 841 } 842 if (is_readable($filename_source) && is_file($filename_source) && ($fp_src = fopen($filename_source, 'rb'))) { 843 if (($fp_dest = fopen($filename_dest, 'wb'))) { 844 if (fseek($fp_src, $offset) == 0) { 845 $byteslefttowrite = $length; 846 while (($byteslefttowrite > 0) && ($buffer = fread($fp_src, min($byteslefttowrite, getID3::FREAD_BUFFER_SIZE)))) { 847 $byteswritten = fwrite($fp_dest, $buffer, $byteslefttowrite); 848 $byteslefttowrite -= $byteswritten; 849 } 850 fclose($fp_dest); 851 return true; 852 } else { 853 fclose($fp_src); 854 throw new Exception('failed to seek to offset '.$offset.' in '.$filename_source); 855 } 856 } else { 857 throw new Exception('failed to create file for writing '.$filename_dest); 858 } 859 } else { 860 throw new Exception('failed to open file for reading '.$filename_source); 861 } 862 } 863 864 /** 865 * @param int $charval 866 * 867 * @return string 868 */ 869 public static function iconv_fallback_int_utf8($charval) { 870 if ($charval < 128) { 871 // 0bbbbbbb 872 $newcharstring = chr($charval); 873 } elseif ($charval < 2048) { 874 // 110bbbbb 10bbbbbb 875 $newcharstring = chr(($charval >> 6) | 0xC0); 876 $newcharstring .= chr(($charval & 0x3F) | 0x80); 877 } elseif ($charval < 65536) { 878 // 1110bbbb 10bbbbbb 10bbbbbb 879 $newcharstring = chr(($charval >> 12) | 0xE0); 880 $newcharstring .= chr(($charval >> 6) | 0xC0); 881 $newcharstring .= chr(($charval & 0x3F) | 0x80); 882 } else { 883 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 884 $newcharstring = chr(($charval >> 18) | 0xF0); 885 $newcharstring .= chr(($charval >> 12) | 0xC0); 886 $newcharstring .= chr(($charval >> 6) | 0xC0); 887 $newcharstring .= chr(($charval & 0x3F) | 0x80); 888 } 889 return $newcharstring; 890 } 891 892 /** 893 * ISO-8859-1 => UTF-8 894 * 895 * @param string $string 896 * @param bool $bom 897 * 898 * @return string 899 */ 900 public static function iconv_fallback_iso88591_utf8($string, $bom=false) { 901 $newcharstring = ''; 902 if ($bom) { 903 $newcharstring .= "\xEF\xBB\xBF"; 904 } 905 for ($i = 0; $i < strlen($string); $i++) { 906 $charval = ord($string[$i]); 907 $newcharstring .= self::iconv_fallback_int_utf8($charval); 908 } 909 return $newcharstring; 910 } 911 912 /** 913 * ISO-8859-1 => UTF-16BE 914 * 915 * @param string $string 916 * @param bool $bom 917 * 918 * @return string 919 */ 920 public static function iconv_fallback_iso88591_utf16be($string, $bom=false) { 921 $newcharstring = ''; 922 if ($bom) { 923 $newcharstring .= "\xFE\xFF"; 924 } 925 for ($i = 0; $i < strlen($string); $i++) { 926 $newcharstring .= "\x00".$string[$i]; 927 } 928 return $newcharstring; 929 } 930 931 /** 932 * ISO-8859-1 => UTF-16LE 933 * 934 * @param string $string 935 * @param bool $bom 936 * 937 * @return string 938 */ 939 public static function iconv_fallback_iso88591_utf16le($string, $bom=false) { 940 $newcharstring = ''; 941 if ($bom) { 942 $newcharstring .= "\xFF\xFE"; 943 } 944 for ($i = 0; $i < strlen($string); $i++) { 945 $newcharstring .= $string[$i]."\x00"; 946 } 947 return $newcharstring; 948 } 949 950 /** 951 * ISO-8859-1 => UTF-16LE (BOM) 952 * 953 * @param string $string 954 * 955 * @return string 956 */ 957 public static function iconv_fallback_iso88591_utf16($string) { 958 return self::iconv_fallback_iso88591_utf16le($string, true); 959 } 960 961 /** 962 * UTF-8 => ISO-8859-1 963 * 964 * @param string $string 965 * 966 * @return string 967 */ 968 public static function iconv_fallback_utf8_iso88591($string) { 969 $newcharstring = ''; 970 $offset = 0; 971 $stringlength = strlen($string); 972 while ($offset < $stringlength) { 973 if ((ord($string[$offset]) | 0x07) == 0xF7) { 974 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 975 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 976 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 977 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 978 (ord($string[($offset + 3)]) & 0x3F); 979 $offset += 4; 980 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 981 // 1110bbbb 10bbbbbb 10bbbbbb 982 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 983 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 984 (ord($string[($offset + 2)]) & 0x3F); 985 $offset += 3; 986 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 987 // 110bbbbb 10bbbbbb 988 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 989 (ord($string[($offset + 1)]) & 0x3F); 990 $offset += 2; 991 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 992 // 0bbbbbbb 993 $charval = ord($string[$offset]); 994 $offset += 1; 995 } else { 996 // error? throw some kind of warning here? 997 $charval = false; 998 $offset += 1; 999 } 1000 if ($charval !== false) { 1001 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1002 } 1003 } 1004 return $newcharstring; 1005 } 1006 1007 /** 1008 * UTF-8 => UTF-16BE 1009 * 1010 * @param string $string 1011 * @param bool $bom 1012 * 1013 * @return string 1014 */ 1015 public static function iconv_fallback_utf8_utf16be($string, $bom=false) { 1016 $newcharstring = ''; 1017 if ($bom) { 1018 $newcharstring .= "\xFE\xFF"; 1019 } 1020 $offset = 0; 1021 $stringlength = strlen($string); 1022 while ($offset < $stringlength) { 1023 if ((ord($string[$offset]) | 0x07) == 0xF7) { 1024 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 1025 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 1026 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 1027 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 1028 (ord($string[($offset + 3)]) & 0x3F); 1029 $offset += 4; 1030 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 1031 // 1110bbbb 10bbbbbb 10bbbbbb 1032 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 1033 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 1034 (ord($string[($offset + 2)]) & 0x3F); 1035 $offset += 3; 1036 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 1037 // 110bbbbb 10bbbbbb 1038 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 1039 (ord($string[($offset + 1)]) & 0x3F); 1040 $offset += 2; 1041 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 1042 // 0bbbbbbb 1043 $charval = ord($string[$offset]); 1044 $offset += 1; 1045 } else { 1046 // error? throw some kind of warning here? 1047 $charval = false; 1048 $offset += 1; 1049 } 1050 if ($charval !== false) { 1051 $newcharstring .= (($charval < 65536) ? self::BigEndian2String($charval, 2) : "\x00".'?'); 1052 } 1053 } 1054 return $newcharstring; 1055 } 1056 1057 /** 1058 * UTF-8 => UTF-16LE 1059 * 1060 * @param string $string 1061 * @param bool $bom 1062 * 1063 * @return string 1064 */ 1065 public static function iconv_fallback_utf8_utf16le($string, $bom=false) { 1066 $newcharstring = ''; 1067 if ($bom) { 1068 $newcharstring .= "\xFF\xFE"; 1069 } 1070 $offset = 0; 1071 $stringlength = strlen($string); 1072 while ($offset < $stringlength) { 1073 if ((ord($string[$offset]) | 0x07) == 0xF7) { 1074 // 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb 1075 $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) & 1076 ((ord($string[($offset + 1)]) & 0x3F) << 12) & 1077 ((ord($string[($offset + 2)]) & 0x3F) << 6) & 1078 (ord($string[($offset + 3)]) & 0x3F); 1079 $offset += 4; 1080 } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) { 1081 // 1110bbbb 10bbbbbb 10bbbbbb 1082 $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) & 1083 ((ord($string[($offset + 1)]) & 0x3F) << 6) & 1084 (ord($string[($offset + 2)]) & 0x3F); 1085 $offset += 3; 1086 } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) { 1087 // 110bbbbb 10bbbbbb 1088 $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) & 1089 (ord($string[($offset + 1)]) & 0x3F); 1090 $offset += 2; 1091 } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) { 1092 // 0bbbbbbb 1093 $charval = ord($string[$offset]); 1094 $offset += 1; 1095 } else { 1096 // error? maybe throw some warning here? 1097 $charval = false; 1098 $offset += 1; 1099 } 1100 if ($charval !== false) { 1101 $newcharstring .= (($charval < 65536) ? self::LittleEndian2String($charval, 2) : '?'."\x00"); 1102 } 1103 } 1104 return $newcharstring; 1105 } 1106 1107 /** 1108 * UTF-8 => UTF-16LE (BOM) 1109 * 1110 * @param string $string 1111 * 1112 * @return string 1113 */ 1114 public static function iconv_fallback_utf8_utf16($string) { 1115 return self::iconv_fallback_utf8_utf16le($string, true); 1116 } 1117 1118 /** 1119 * UTF-16BE => UTF-8 1120 * 1121 * @param string $string 1122 * 1123 * @return string 1124 */ 1125 public static function iconv_fallback_utf16be_utf8($string) { 1126 if (substr($string, 0, 2) == "\xFE\xFF") { 1127 // strip BOM 1128 $string = substr($string, 2); 1129 } 1130 $newcharstring = ''; 1131 for ($i = 0; $i < strlen($string); $i += 2) { 1132 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1133 $newcharstring .= self::iconv_fallback_int_utf8($charval); 1134 } 1135 return $newcharstring; 1136 } 1137 1138 /** 1139 * UTF-16LE => UTF-8 1140 * 1141 * @param string $string 1142 * 1143 * @return string 1144 */ 1145 public static function iconv_fallback_utf16le_utf8($string) { 1146 if (substr($string, 0, 2) == "\xFF\xFE") { 1147 // strip BOM 1148 $string = substr($string, 2); 1149 } 1150 $newcharstring = ''; 1151 for ($i = 0; $i < strlen($string); $i += 2) { 1152 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1153 $newcharstring .= self::iconv_fallback_int_utf8($charval); 1154 } 1155 return $newcharstring; 1156 } 1157 1158 /** 1159 * UTF-16BE => ISO-8859-1 1160 * 1161 * @param string $string 1162 * 1163 * @return string 1164 */ 1165 public static function iconv_fallback_utf16be_iso88591($string) { 1166 if (substr($string, 0, 2) == "\xFE\xFF") { 1167 // strip BOM 1168 $string = substr($string, 2); 1169 } 1170 $newcharstring = ''; 1171 for ($i = 0; $i < strlen($string); $i += 2) { 1172 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1173 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1174 } 1175 return $newcharstring; 1176 } 1177 1178 /** 1179 * UTF-16LE => ISO-8859-1 1180 * 1181 * @param string $string 1182 * 1183 * @return string 1184 */ 1185 public static function iconv_fallback_utf16le_iso88591($string) { 1186 if (substr($string, 0, 2) == "\xFF\xFE") { 1187 // strip BOM 1188 $string = substr($string, 2); 1189 } 1190 $newcharstring = ''; 1191 for ($i = 0; $i < strlen($string); $i += 2) { 1192 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1193 $newcharstring .= (($charval < 256) ? chr($charval) : '?'); 1194 } 1195 return $newcharstring; 1196 } 1197 1198 /** 1199 * UTF-16 (BOM) => ISO-8859-1 1200 * 1201 * @param string $string 1202 * 1203 * @return string 1204 */ 1205 public static function iconv_fallback_utf16_iso88591($string) { 1206 $bom = substr($string, 0, 2); 1207 if ($bom == "\xFE\xFF") { 1208 return self::iconv_fallback_utf16be_iso88591(substr($string, 2)); 1209 } elseif ($bom == "\xFF\xFE") { 1210 return self::iconv_fallback_utf16le_iso88591(substr($string, 2)); 1211 } 1212 return $string; 1213 } 1214 1215 /** 1216 * UTF-16 (BOM) => UTF-8 1217 * 1218 * @param string $string 1219 * 1220 * @return string 1221 */ 1222 public static function iconv_fallback_utf16_utf8($string) { 1223 $bom = substr($string, 0, 2); 1224 if ($bom == "\xFE\xFF") { 1225 return self::iconv_fallback_utf16be_utf8(substr($string, 2)); 1226 } elseif ($bom == "\xFF\xFE") { 1227 return self::iconv_fallback_utf16le_utf8(substr($string, 2)); 1228 } 1229 return $string; 1230 } 1231 1232 /** 1233 * @param string $in_charset 1234 * @param string $out_charset 1235 * @param string $string 1236 * 1237 * @return string 1238 * @throws Exception 1239 */ 1240 public static function iconv_fallback($in_charset, $out_charset, $string) { 1241 1242 if ($in_charset == $out_charset) { 1243 return $string; 1244 } 1245 1246 // mb_convert_encoding() available 1247 if (function_exists('mb_convert_encoding')) { 1248 if ((strtoupper($in_charset) == 'UTF-16') && (substr($string, 0, 2) != "\xFE\xFF") && (substr($string, 0, 2) != "\xFF\xFE")) { 1249 // if BOM missing, mb_convert_encoding will mishandle the conversion, assume UTF-16BE and prepend appropriate BOM 1250 $string = "\xFF\xFE".$string; 1251 } 1252 if ((strtoupper($in_charset) == 'UTF-16') && (strtoupper($out_charset) == 'UTF-8')) { 1253 if (($string == "\xFF\xFE") || ($string == "\xFE\xFF")) { 1254 // if string consists of only BOM, mb_convert_encoding will return the BOM unmodified 1255 return ''; 1256 } 1257 } 1258 if ($converted_string = @mb_convert_encoding($string, $out_charset, $in_charset)) { 1259 switch ($out_charset) { 1260 case 'ISO-8859-1': 1261 $converted_string = rtrim($converted_string, "\x00"); 1262 break; 1263 } 1264 return $converted_string; 1265 } 1266 return $string; 1267 1268 // iconv() available 1269 } elseif (function_exists('iconv')) { 1270 if ($converted_string = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) { 1271 switch ($out_charset) { 1272 case 'ISO-8859-1': 1273 $converted_string = rtrim($converted_string, "\x00"); 1274 break; 1275 } 1276 return $converted_string; 1277 } 1278 1279 // iconv() may sometimes fail with "illegal character in input string" error message 1280 // and return an empty string, but returning the unconverted string is more useful 1281 return $string; 1282 } 1283 1284 1285 // neither mb_convert_encoding or iconv() is available 1286 static $ConversionFunctionList = array(); 1287 if (empty($ConversionFunctionList)) { 1288 $ConversionFunctionList['ISO-8859-1']['UTF-8'] = 'iconv_fallback_iso88591_utf8'; 1289 $ConversionFunctionList['ISO-8859-1']['UTF-16'] = 'iconv_fallback_iso88591_utf16'; 1290 $ConversionFunctionList['ISO-8859-1']['UTF-16BE'] = 'iconv_fallback_iso88591_utf16be'; 1291 $ConversionFunctionList['ISO-8859-1']['UTF-16LE'] = 'iconv_fallback_iso88591_utf16le'; 1292 $ConversionFunctionList['UTF-8']['ISO-8859-1'] = 'iconv_fallback_utf8_iso88591'; 1293 $ConversionFunctionList['UTF-8']['UTF-16'] = 'iconv_fallback_utf8_utf16'; 1294 $ConversionFunctionList['UTF-8']['UTF-16BE'] = 'iconv_fallback_utf8_utf16be'; 1295 $ConversionFunctionList['UTF-8']['UTF-16LE'] = 'iconv_fallback_utf8_utf16le'; 1296 $ConversionFunctionList['UTF-16']['ISO-8859-1'] = 'iconv_fallback_utf16_iso88591'; 1297 $ConversionFunctionList['UTF-16']['UTF-8'] = 'iconv_fallback_utf16_utf8'; 1298 $ConversionFunctionList['UTF-16LE']['ISO-8859-1'] = 'iconv_fallback_utf16le_iso88591'; 1299 $ConversionFunctionList['UTF-16LE']['UTF-8'] = 'iconv_fallback_utf16le_utf8'; 1300 $ConversionFunctionList['UTF-16BE']['ISO-8859-1'] = 'iconv_fallback_utf16be_iso88591'; 1301 $ConversionFunctionList['UTF-16BE']['UTF-8'] = 'iconv_fallback_utf16be_utf8'; 1302 } 1303 if (isset($ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)])) { 1304 $ConversionFunction = $ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)]; 1305 return self::$ConversionFunction($string); 1306 } 1307 throw new Exception('PHP does not has mb_convert_encoding() or iconv() support - cannot convert from '.$in_charset.' to '.$out_charset); 1308 } 1309 1310 /** 1311 * @param mixed $data 1312 * @param string $charset 1313 * 1314 * @return mixed 1315 */ 1316 public static function recursiveMultiByteCharString2HTML($data, $charset='ISO-8859-1') { 1317 if (is_string($data)) { 1318 return self::MultiByteCharString2HTML($data, $charset); 1319 } elseif (is_array($data)) { 1320 $return_data = array(); 1321 foreach ($data as $key => $value) { 1322 $return_data[$key] = self::recursiveMultiByteCharString2HTML($value, $charset); 1323 } 1324 return $return_data; 1325 } 1326 // integer, float, objects, resources, etc 1327 return $data; 1328 } 1329 1330 /** 1331 * @param string|int|float $string 1332 * @param string $charset 1333 * 1334 * @return string 1335 */ 1336 public static function MultiByteCharString2HTML($string, $charset='ISO-8859-1') { 1337 $string = (string) $string; // in case trying to pass a numeric (float, int) string, would otherwise return an empty string 1338 $HTMLstring = ''; 1339 1340 switch (strtolower($charset)) { 1341 case '1251': 1342 case '1252': 1343 case '866': 1344 case '932': 1345 case '936': 1346 case '950': 1347 case 'big5': 1348 case 'big5-hkscs': 1349 case 'cp1251': 1350 case 'cp1252': 1351 case 'cp866': 1352 case 'euc-jp': 1353 case 'eucjp': 1354 case 'gb2312': 1355 case 'ibm866': 1356 case 'iso-8859-1': 1357 case 'iso-8859-15': 1358 case 'iso8859-1': 1359 case 'iso8859-15': 1360 case 'koi8-r': 1361 case 'koi8-ru': 1362 case 'koi8r': 1363 case 'shift_jis': 1364 case 'sjis': 1365 case 'win-1251': 1366 case 'windows-1251': 1367 case 'windows-1252': 1368 $HTMLstring = htmlentities($string, ENT_COMPAT, $charset); 1369 break; 1370 1371 case 'utf-8': 1372 $strlen = strlen($string); 1373 for ($i = 0; $i < $strlen; $i++) { 1374 $char_ord_val = ord($string[$i]); 1375 $charval = 0; 1376 if ($char_ord_val < 0x80) { 1377 $charval = $char_ord_val; 1378 } elseif ((($char_ord_val & 0xF0) >> 4) == 0x0F && $i+3 < $strlen) { 1379 $charval = (($char_ord_val & 0x07) << 18); 1380 $charval += ((ord($string[++$i]) & 0x3F) << 12); 1381 $charval += ((ord($string[++$i]) & 0x3F) << 6); 1382 $charval += (ord($string[++$i]) & 0x3F); 1383 } elseif ((($char_ord_val & 0xE0) >> 5) == 0x07 && $i+2 < $strlen) { 1384 $charval = (($char_ord_val & 0x0F) << 12); 1385 $charval += ((ord($string[++$i]) & 0x3F) << 6); 1386 $charval += (ord($string[++$i]) & 0x3F); 1387 } elseif ((($char_ord_val & 0xC0) >> 6) == 0x03 && $i+1 < $strlen) { 1388 $charval = (($char_ord_val & 0x1F) << 6); 1389 $charval += (ord($string[++$i]) & 0x3F); 1390 } 1391 if (($charval >= 32) && ($charval <= 127)) { 1392 $HTMLstring .= htmlentities(chr($charval)); 1393 } else { 1394 $HTMLstring .= '&#'.$charval.';'; 1395 } 1396 } 1397 break; 1398 1399 case 'utf-16le': 1400 for ($i = 0; $i < strlen($string); $i += 2) { 1401 $charval = self::LittleEndian2Int(substr($string, $i, 2)); 1402 if (($charval >= 32) && ($charval <= 127)) { 1403 $HTMLstring .= chr($charval); 1404 } else { 1405 $HTMLstring .= '&#'.$charval.';'; 1406 } 1407 } 1408 break; 1409 1410 case 'utf-16be': 1411 for ($i = 0; $i < strlen($string); $i += 2) { 1412 $charval = self::BigEndian2Int(substr($string, $i, 2)); 1413 if (($charval >= 32) && ($charval <= 127)) { 1414 $HTMLstring .= chr($charval); 1415 } else { 1416 $HTMLstring .= '&#'.$charval.';'; 1417 } 1418 } 1419 break; 1420 1421 default: 1422 $HTMLstring = 'ERROR: Character set "'.$charset.'" not supported in MultiByteCharString2HTML()'; 1423 break; 1424 } 1425 return $HTMLstring; 1426 } 1427 1428 /** 1429 * @param int $namecode 1430 * 1431 * @return string 1432 */ 1433 public static function RGADnameLookup($namecode) { 1434 static $RGADname = array(); 1435 if (empty($RGADname)) { 1436 $RGADname[0] = 'not set'; 1437 $RGADname[1] = 'Track Gain Adjustment'; 1438 $RGADname[2] = 'Album Gain Adjustment'; 1439 } 1440 1441 return (isset($RGADname[$namecode]) ? $RGADname[$namecode] : ''); 1442 } 1443 1444 /** 1445 * @param int $originatorcode 1446 * 1447 * @return string 1448 */ 1449 public static function RGADoriginatorLookup($originatorcode) { 1450 static $RGADoriginator = array(); 1451 if (empty($RGADoriginator)) { 1452 $RGADoriginator[0] = 'unspecified'; 1453 $RGADoriginator[1] = 'pre-set by artist/producer/mastering engineer'; 1454 $RGADoriginator[2] = 'set by user'; 1455 $RGADoriginator[3] = 'determined automatically'; 1456 } 1457 1458 return (isset($RGADoriginator[$originatorcode]) ? $RGADoriginator[$originatorcode] : ''); 1459 } 1460 1461 /** 1462 * @param int $rawadjustment 1463 * @param int $signbit 1464 * 1465 * @return float 1466 */ 1467 public static function RGADadjustmentLookup($rawadjustment, $signbit) { 1468 $adjustment = (float) $rawadjustment / 10; 1469 if ($signbit == 1) { 1470 $adjustment *= -1; 1471 } 1472 return $adjustment; 1473 } 1474 1475 /** 1476 * @param int $namecode 1477 * @param int $originatorcode 1478 * @param int $replaygain 1479 * 1480 * @return string 1481 */ 1482 public static function RGADgainString($namecode, $originatorcode, $replaygain) { 1483 if ($replaygain < 0) { 1484 $signbit = '1'; 1485 } else { 1486 $signbit = '0'; 1487 } 1488 $storedreplaygain = intval(round($replaygain * 10)); 1489 $gainstring = str_pad(decbin($namecode), 3, '0', STR_PAD_LEFT); 1490 $gainstring .= str_pad(decbin($originatorcode), 3, '0', STR_PAD_LEFT); 1491 $gainstring .= $signbit; 1492 $gainstring .= str_pad(decbin($storedreplaygain), 9, '0', STR_PAD_LEFT); 1493 1494 return $gainstring; 1495 } 1496 1497 /** 1498 * @param float $amplitude 1499 * 1500 * @return float 1501 */ 1502 public static function RGADamplitude2dB($amplitude) { 1503 return 20 * log10($amplitude); 1504 } 1505 1506 /** 1507 * @param string $imgData 1508 * @param array $imageinfo 1509 * 1510 * @return array|false 1511 */ 1512 public static function GetDataImageSize($imgData, &$imageinfo=array()) { 1513 if (PHP_VERSION_ID >= 50400) { 1514 $GetDataImageSize = @getimagesizefromstring($imgData, $imageinfo); 1515 if ($GetDataImageSize === false) { 1516 return false; 1517 } 1518 $GetDataImageSize['height'] = $GetDataImageSize[0]; 1519 $GetDataImageSize['width'] = $GetDataImageSize[1]; 1520 return $GetDataImageSize; 1521 } 1522 static $tempdir = ''; 1523 if (empty($tempdir)) { 1524 if (function_exists('sys_get_temp_dir')) { 1525 $tempdir = sys_get_temp_dir(); // https://github.com/JamesHeinrich/getID3/issues/52 1526 } 1527 1528 // yes this is ugly, feel free to suggest a better way 1529 if (include_once(dirname(__FILE__).'/getid3.php')) { 1530 $getid3_temp = new getID3(); 1531 if ($getid3_temp_tempdir = $getid3_temp->tempdir) { 1532 $tempdir = $getid3_temp_tempdir; 1533 } 1534 unset($getid3_temp, $getid3_temp_tempdir); 1535 } 1536 } 1537 $GetDataImageSize = false; 1538 if ($tempfilename = tempnam($tempdir, 'gI3')) { 1539 if (is_writable($tempfilename) && is_file($tempfilename) && ($tmp = fopen($tempfilename, 'wb'))) { 1540 fwrite($tmp, $imgData); 1541 fclose($tmp); 1542 $GetDataImageSize = @getimagesize($tempfilename, $imageinfo); 1543 if ($GetDataImageSize === false) { 1544 return false; 1545 } 1546 $GetDataImageSize['height'] = $GetDataImageSize[0]; 1547 $GetDataImageSize['width'] = $GetDataImageSize[1]; 1548 } 1549 unlink($tempfilename); 1550 } 1551 return $GetDataImageSize; 1552 } 1553 1554 /** 1555 * @param string $mime_type 1556 * 1557 * @return string 1558 */ 1559 public static function ImageExtFromMime($mime_type) { 1560 // temporary way, works OK for now, but should be reworked in the future 1561 return str_replace(array('image/', 'x-', 'jpeg'), array('', '', 'jpg'), $mime_type); 1562 } 1563 1564 /** 1565 * @param array $ThisFileInfo 1566 * @param bool $option_tags_html default true (just as in the main getID3 class) 1567 * 1568 * @return bool 1569 */ 1570 public static function CopyTagsToComments(&$ThisFileInfo, $option_tags_html=true) { 1571 // Copy all entries from ['tags'] into common ['comments'] 1572 if (!empty($ThisFileInfo['tags'])) { 1573 1574 // Some tag types can only support limited character sets and may contain data in non-standard encoding (usually ID3v1) 1575 // and/or poorly-transliterated tag values that are also in tag formats that do support full-range character sets 1576 // To make the output more user-friendly, process the potentially-problematic tag formats last to enhance the chance that 1577 // the first entries in [comments] are the most correct and the "bad" ones (if any) come later. 1578 // https://github.com/JamesHeinrich/getID3/issues/338 1579 $processLastTagTypes = array('id3v1','riff'); 1580 foreach ($processLastTagTypes as $processLastTagType) { 1581 if (isset($ThisFileInfo['tags'][$processLastTagType])) { 1582 // bubble ID3v1 to the end, if present to aid in detecting bad ID3v1 encodings 1583 $temp = $ThisFileInfo['tags'][$processLastTagType]; 1584 unset($ThisFileInfo['tags'][$processLastTagType]); 1585 $ThisFileInfo['tags'][$processLastTagType] = $temp; 1586 unset($temp); 1587 } 1588 } 1589 foreach ($ThisFileInfo['tags'] as $tagtype => $tagarray) { 1590 foreach ($tagarray as $tagname => $tagdata) { 1591 foreach ($tagdata as $key => $value) { 1592 if (!empty($value)) { 1593 if (empty($ThisFileInfo['comments'][$tagname])) { 1594 1595 // fall through and append value 1596 1597 } elseif ($tagtype == 'id3v1') { 1598 1599 $newvaluelength = strlen(trim($value)); 1600 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) { 1601 $oldvaluelength = strlen(trim($existingvalue)); 1602 if (($newvaluelength <= $oldvaluelength) && (substr($existingvalue, 0, $newvaluelength) == trim($value))) { 1603 // new value is identical but shorter-than (or equal-length to) one already in comments - skip 1604 break 2; 1605 } 1606 1607 if (function_exists('mb_convert_encoding')) { 1608 if (trim($value) == trim(substr(mb_convert_encoding($existingvalue, $ThisFileInfo['id3v1']['encoding'], $ThisFileInfo['encoding']), 0, 30))) { 1609 // value stored in ID3v1 appears to be probably the multibyte value transliterated (badly) into ISO-8859-1 in ID3v1. 1610 // As an example, Foobar2000 will do this if you tag a file with Chinese or Arabic or Cyrillic or something that doesn't fit into ISO-8859-1 the ID3v1 will consist of mostly "?" characters, one per multibyte unrepresentable character 1611 break 2; 1612 } 1613 } 1614 } 1615 1616 } elseif (!is_array($value)) { 1617 1618 $newvaluelength = strlen(trim($value)); 1619 $newvaluelengthMB = mb_strlen(trim($value)); 1620 foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) { 1621 $oldvaluelength = strlen(trim($existingvalue)); 1622 $oldvaluelengthMB = mb_strlen(trim($existingvalue)); 1623 if (($newvaluelengthMB == $oldvaluelengthMB) && ($existingvalue == getid3_lib::iconv_fallback('UTF-8', 'ASCII', $value))) { 1624 // https://github.com/JamesHeinrich/getID3/issues/338 1625 // check for tags containing extended characters that may have been forced into limited-character storage (e.g. UTF8 values into ASCII) 1626 // which will usually display unrepresentable characters as "?" 1627 $ThisFileInfo['comments'][$tagname][$existingkey] = trim($value); 1628 break; 1629 } 1630 if ((strlen($existingvalue) > 10) && ($newvaluelength > $oldvaluelength) && (substr(trim($value), 0, strlen($existingvalue)) == $existingvalue)) { 1631 $ThisFileInfo['comments'][$tagname][$existingkey] = trim($value); 1632 break; 1633 } 1634 } 1635 1636 } 1637 if (is_array($value) || empty($ThisFileInfo['comments'][$tagname]) || !in_array(trim($value), $ThisFileInfo['comments'][$tagname])) { 1638 $value = (is_string($value) ? trim($value) : $value); 1639 if (!is_int($key) && !ctype_digit($key)) { 1640 $ThisFileInfo['comments'][$tagname][$key] = $value; 1641 } else { 1642 if (!isset($ThisFileInfo['comments'][$tagname])) { 1643 $ThisFileInfo['comments'][$tagname] = array($value); 1644 } else { 1645 $ThisFileInfo['comments'][$tagname][] = $value; 1646 } 1647 } 1648 } 1649 } 1650 } 1651 } 1652 } 1653 1654 // attempt to standardize spelling of returned keys 1655 if (!empty($ThisFileInfo['comments'])) { 1656 $StandardizeFieldNames = array( 1657 'tracknumber' => 'track_number', 1658 'track' => 'track_number', 1659 ); 1660 foreach ($StandardizeFieldNames as $badkey => $goodkey) { 1661 if (array_key_exists($badkey, $ThisFileInfo['comments']) && !array_key_exists($goodkey, $ThisFileInfo['comments'])) { 1662 $ThisFileInfo['comments'][$goodkey] = $ThisFileInfo['comments'][$badkey]; 1663 unset($ThisFileInfo['comments'][$badkey]); 1664 } 1665 } 1666 } 1667 1668 if ($option_tags_html) { 1669 // Copy ['comments'] to ['comments_html'] 1670 if (!empty($ThisFileInfo['comments'])) { 1671 foreach ($ThisFileInfo['comments'] as $field => $values) { 1672 if ($field == 'picture') { 1673 // pictures can take up a lot of space, and we don't need multiple copies of them 1674 // let there be a single copy in [comments][picture], and not elsewhere 1675 continue; 1676 } 1677 foreach ($values as $index => $value) { 1678 if (is_array($value)) { 1679 $ThisFileInfo['comments_html'][$field][$index] = $value; 1680 } else { 1681 $ThisFileInfo['comments_html'][$field][$index] = str_replace('�', '', self::MultiByteCharString2HTML($value, $ThisFileInfo['encoding'])); 1682 } 1683 } 1684 } 1685 } 1686 } 1687 1688 } 1689 return true; 1690 } 1691 1692 /** 1693 * @param string $key 1694 * @param int $begin 1695 * @param int $end 1696 * @param string $file 1697 * @param string $name 1698 * 1699 * @return string 1700 */ 1701 public static function EmbeddedLookup($key, $begin, $end, $file, $name) { 1702 1703 // Cached 1704 static $cache; 1705 if (isset($cache[$file][$name])) { 1706 return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : ''); 1707 } 1708 1709 // Init 1710 $keylength = strlen($key); 1711 $line_count = $end - $begin - 7; 1712 1713 // Open php file 1714 $fp = fopen($file, 'r'); 1715 1716 // Discard $begin lines 1717 for ($i = 0; $i < ($begin + 3); $i++) { 1718 fgets($fp, 1024); 1719 } 1720 1721 // Loop thru line 1722 while (0 < $line_count--) { 1723 1724 // Read line 1725 $line = ltrim(fgets($fp, 1024), "\t "); 1726 1727 // METHOD A: only cache the matching key - less memory but slower on next lookup of not-previously-looked-up key 1728 //$keycheck = substr($line, 0, $keylength); 1729 //if ($key == $keycheck) { 1730 // $cache[$file][$name][$keycheck] = substr($line, $keylength + 1); 1731 // break; 1732 //} 1733 1734 // METHOD B: cache all keys in this lookup - more memory but faster on next lookup of not-previously-looked-up key 1735 //$cache[$file][$name][substr($line, 0, $keylength)] = trim(substr($line, $keylength + 1)); 1736 $explodedLine = explode("\t", $line, 2); 1737 $ThisKey = $explodedLine[0]; 1738 $ThisValue = (isset($explodedLine[1]) ? $explodedLine[1] : ''); 1739 $cache[$file][$name][$ThisKey] = trim($ThisValue); 1740 } 1741 1742 // Close and return 1743 fclose($fp); 1744 return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : ''); 1745 } 1746 1747 /** 1748 * @param string $filename 1749 * @param string $sourcefile 1750 * @param bool $DieOnFailure 1751 * 1752 * @return bool 1753 * @throws Exception 1754 */ 1755 public static function IncludeDependency($filename, $sourcefile, $DieOnFailure=false) { 1756 global $GETID3_ERRORARRAY; 1757 1758 if (file_exists($filename)) { 1759 if (include_once($filename)) { 1760 return true; 1761 } else { 1762 $diemessage = basename($sourcefile).' depends on '.$filename.', which has errors'; 1763 } 1764 } else { 1765 $diemessage = basename($sourcefile).' depends on '.$filename.', which is missing'; 1766 } 1767 if ($DieOnFailure) { 1768 throw new Exception($diemessage); 1769 } else { 1770 $GETID3_ERRORARRAY[] = $diemessage; 1771 } 1772 return false; 1773 } 1774 1775 /** 1776 * @param string $string 1777 * 1778 * @return string 1779 */ 1780 public static function trimNullByte($string) { 1781 return trim($string, "\x00"); 1782 } 1783 1784 /** 1785 * @param string $path 1786 * 1787 * @return float|bool 1788 */ 1789 public static function getFileSizeSyscall($path) { 1790 $commandline = null; 1791 $filesize = false; 1792 1793 if (GETID3_OS_ISWINDOWS) { 1794 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: 1795 $filesystem = new COM('Scripting.FileSystemObject'); 1796 $file = $filesystem->GetFile($path); 1797 $filesize = $file->Size(); 1798 unset($filesystem, $file); 1799 } else { 1800 $commandline = 'for %I in ('.escapeshellarg($path).') do @echo %~zI'; 1801 } 1802 } else { 1803 $commandline = 'ls -l '.escapeshellarg($path).' | awk \'{print $5}\''; 1804 } 1805 if (isset($commandline)) { 1806 $output = trim(shell_exec($commandline)); 1807 if (ctype_digit($output)) { 1808 $filesize = (float) $output; 1809 } 1810 } 1811 return $filesize; 1812 } 1813 1814 /** 1815 * @param string $filename 1816 * 1817 * @return string|false 1818 */ 1819 public static function truepath($filename) { 1820 // 2017-11-08: this could use some improvement, patches welcome 1821 if (preg_match('#^(\\\\\\\\|//)[a-z0-9]#i', $filename, $matches)) { 1822 // PHP's built-in realpath function does not work on UNC Windows shares 1823 $goodpath = array(); 1824 foreach (explode('/', str_replace('\\', '/', $filename)) as $part) { 1825 if ($part == '.') { 1826 continue; 1827 } 1828 if ($part == '..') { 1829 if (count($goodpath)) { 1830 array_pop($goodpath); 1831 } else { 1832 // cannot step above this level, already at top level 1833 return false; 1834 } 1835 } else { 1836 $goodpath[] = $part; 1837 } 1838 } 1839 return implode(DIRECTORY_SEPARATOR, $goodpath); 1840 } 1841 return realpath($filename); 1842 } 1843 1844 /** 1845 * Workaround for Bug #37268 (https://bugs.php.net/bug.php?id=37268) 1846 * 1847 * @param string $path A path. 1848 * @param string $suffix If the name component ends in suffix this will also be cut off. 1849 * 1850 * @return string 1851 */ 1852 public static function mb_basename($path, $suffix = '') { 1853 $splited = preg_split('#/#', rtrim($path, '/ ')); 1854 return substr(basename('X'.$splited[count($splited) - 1], $suffix), 1); 1855 } 1856 1857 }
title
Description
Body
title
Description
Body
title
Description
Body
title
Body
| Generated : Sat Jun 27 08:20:12 2026 | Cross-referenced by PHPXref |