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1 <?php 2 if ( ! class_exists( 'Services_JSON' ) ) : 3 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ 4 /** 5 * Converts to and from JSON format. 6 * 7 * JSON (JavaScript Object Notation) is a lightweight data-interchange 8 * format. It is easy for humans to read and write. It is easy for machines 9 * to parse and generate. It is based on a subset of the JavaScript 10 * Programming Language, Standard ECMA-262 3rd Edition - December 1999. 11 * This feature can also be found in Python. JSON is a text format that is 12 * completely language independent but uses conventions that are familiar 13 * to programmers of the C-family of languages, including C, C++, C#, Java, 14 * JavaScript, Perl, TCL, and many others. These properties make JSON an 15 * ideal data-interchange language. 16 * 17 * This package provides a simple encoder and decoder for JSON notation. It 18 * is intended for use with client-side Javascript applications that make 19 * use of HTTPRequest to perform server communication functions - data can 20 * be encoded into JSON notation for use in a client-side javascript, or 21 * decoded from incoming Javascript requests. JSON format is native to 22 * Javascript, and can be directly eval()'ed with no further parsing 23 * overhead 24 * 25 * All strings should be in ASCII or UTF-8 format! 26 * 27 * LICENSE: Redistribution and use in source and binary forms, with or 28 * without modification, are permitted provided that the following 29 * conditions are met: Redistributions of source code must retain the 30 * above copyright notice, this list of conditions and the following 31 * disclaimer. Redistributions in binary form must reproduce the above 32 * copyright notice, this list of conditions and the following disclaimer 33 * in the documentation and/or other materials provided with the 34 * distribution. 35 * 36 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 37 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 38 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 39 * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 41 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 42 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 44 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 45 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 46 * DAMAGE. 47 * 48 * @category 49 * @package Services_JSON 50 * @author Michal Migurski <mike-json@teczno.com> 51 * @author Matt Knapp <mdknapp[at]gmail[dot]com> 52 * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> 53 * @copyright 2005 Michal Migurski 54 * @version CVS: $Id: JSON.php 305040 2010-11-02 23:19:03Z alan_k $ 55 * @license http://www.opensource.org/licenses/bsd-license.php 56 * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 57 */ 58 59 /** 60 * Marker constant for Services_JSON::decode(), used to flag stack state 61 */ 62 define('SERVICES_JSON_SLICE', 1); 63 64 /** 65 * Marker constant for Services_JSON::decode(), used to flag stack state 66 */ 67 define('SERVICES_JSON_IN_STR', 2); 68 69 /** 70 * Marker constant for Services_JSON::decode(), used to flag stack state 71 */ 72 define('SERVICES_JSON_IN_ARR', 3); 73 74 /** 75 * Marker constant for Services_JSON::decode(), used to flag stack state 76 */ 77 define('SERVICES_JSON_IN_OBJ', 4); 78 79 /** 80 * Marker constant for Services_JSON::decode(), used to flag stack state 81 */ 82 define('SERVICES_JSON_IN_CMT', 5); 83 84 /** 85 * Behavior switch for Services_JSON::decode() 86 */ 87 define('SERVICES_JSON_LOOSE_TYPE', 16); 88 89 /** 90 * Behavior switch for Services_JSON::decode() 91 */ 92 define('SERVICES_JSON_SUPPRESS_ERRORS', 32); 93 94 /** 95 * Behavior switch for Services_JSON::decode() 96 */ 97 define('SERVICES_JSON_USE_TO_JSON', 64); 98 99 /** 100 * Converts to and from JSON format. 101 * 102 * Brief example of use: 103 * 104 * <code> 105 * // create a new instance of Services_JSON 106 * $json = new Services_JSON(); 107 * 108 * // convert a complexe value to JSON notation, and send it to the browser 109 * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4))); 110 * $output = $json->encode($value); 111 * 112 * print($output); 113 * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]] 114 * 115 * // accept incoming POST data, assumed to be in JSON notation 116 * $input = file_get_contents('php://input', 1000000); 117 * $value = $json->decode($input); 118 * </code> 119 */ 120 class Services_JSON 121 { 122 /** 123 * constructs a new JSON instance 124 * 125 * @param int $use object behavior flags; combine with boolean-OR 126 * 127 * possible values: 128 * - SERVICES_JSON_LOOSE_TYPE: loose typing. 129 * "{...}" syntax creates associative arrays 130 * instead of objects in decode(). 131 * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. 132 * Values which can't be encoded (e.g. resources) 133 * appear as NULL instead of throwing errors. 134 * By default, a deeply-nested resource will 135 * bubble up with an error, so all return values 136 * from encode() should be checked with isError() 137 * - SERVICES_JSON_USE_TO_JSON: call toJSON when serializing objects 138 * It serializes the return value from the toJSON call rather 139 * than the object it'self, toJSON can return associative arrays, 140 * strings or numbers, if you return an object, make sure it does 141 * not have a toJSON method, otherwise an error will occur. 142 */ 143 function Services_JSON($use = 0) 144 { 145 $this->use = $use; 146 $this->_mb_strlen = function_exists('mb_strlen'); 147 $this->_mb_convert_encoding = function_exists('mb_convert_encoding'); 148 $this->_mb_substr = function_exists('mb_substr'); 149 } 150 // private - cache the mbstring lookup results.. 151 var $_mb_strlen = false; 152 var $_mb_substr = false; 153 var $_mb_convert_encoding = false; 154 155 /** 156 * convert a string from one UTF-16 char to one UTF-8 char 157 * 158 * Normally should be handled by mb_convert_encoding, but 159 * provides a slower PHP-only method for installations 160 * that lack the multibye string extension. 161 * 162 * @param string $utf16 UTF-16 character 163 * @return string UTF-8 character 164 * @access private 165 */ 166 function utf162utf8($utf16) 167 { 168 // oh please oh please oh please oh please oh please 169 if($this->_mb_convert_encoding) { 170 return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); 171 } 172 173 $bytes = (ord($utf16{0}) << 8) | ord($utf16{1}); 174 175 switch(true) { 176 case ((0x7F & $bytes) == $bytes): 177 // this case should never be reached, because we are in ASCII range 178 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 179 return chr(0x7F & $bytes); 180 181 case (0x07FF & $bytes) == $bytes: 182 // return a 2-byte UTF-8 character 183 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 184 return chr(0xC0 | (($bytes >> 6) & 0x1F)) 185 . chr(0x80 | ($bytes & 0x3F)); 186 187 case (0xFFFF & $bytes) == $bytes: 188 // return a 3-byte UTF-8 character 189 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 190 return chr(0xE0 | (($bytes >> 12) & 0x0F)) 191 . chr(0x80 | (($bytes >> 6) & 0x3F)) 192 . chr(0x80 | ($bytes & 0x3F)); 193 } 194 195 // ignoring UTF-32 for now, sorry 196 return ''; 197 } 198 199 /** 200 * convert a string from one UTF-8 char to one UTF-16 char 201 * 202 * Normally should be handled by mb_convert_encoding, but 203 * provides a slower PHP-only method for installations 204 * that lack the multibye string extension. 205 * 206 * @param string $utf8 UTF-8 character 207 * @return string UTF-16 character 208 * @access private 209 */ 210 function utf82utf16($utf8) 211 { 212 // oh please oh please oh please oh please oh please 213 if($this->_mb_convert_encoding) { 214 return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); 215 } 216 217 switch($this->strlen8($utf8)) { 218 case 1: 219 // this case should never be reached, because we are in ASCII range 220 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 221 return $utf8; 222 223 case 2: 224 // return a UTF-16 character from a 2-byte UTF-8 char 225 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 226 return chr(0x07 & (ord($utf8{0}) >> 2)) 227 . chr((0xC0 & (ord($utf8{0}) << 6)) 228 | (0x3F & ord($utf8{1}))); 229 230 case 3: 231 // return a UTF-16 character from a 3-byte UTF-8 char 232 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 233 return chr((0xF0 & (ord($utf8{0}) << 4)) 234 | (0x0F & (ord($utf8{1}) >> 2))) 235 . chr((0xC0 & (ord($utf8{1}) << 6)) 236 | (0x7F & ord($utf8{2}))); 237 } 238 239 // ignoring UTF-32 for now, sorry 240 return ''; 241 } 242 243 /** 244 * encodes an arbitrary variable into JSON format (and sends JSON Header) 245 * 246 * @param mixed $var any number, boolean, string, array, or object to be encoded. 247 * see argument 1 to Services_JSON() above for array-parsing behavior. 248 * if var is a strng, note that encode() always expects it 249 * to be in ASCII or UTF-8 format! 250 * 251 * @return mixed JSON string representation of input var or an error if a problem occurs 252 * @access public 253 */ 254 function encode($var) 255 { 256 header('Content-type: application/json'); 257 return $this->encodeUnsafe($var); 258 } 259 /** 260 * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow XSS!!!!) 261 * 262 * @param mixed $var any number, boolean, string, array, or object to be encoded. 263 * see argument 1 to Services_JSON() above for array-parsing behavior. 264 * if var is a strng, note that encode() always expects it 265 * to be in ASCII or UTF-8 format! 266 * 267 * @return mixed JSON string representation of input var or an error if a problem occurs 268 * @access public 269 */ 270 function encodeUnsafe($var) 271 { 272 // see bug #16908 - regarding numeric locale printing 273 $lc = setlocale(LC_NUMERIC, 0); 274 setlocale(LC_NUMERIC, 'C'); 275 $ret = $this->_encode($var); 276 setlocale(LC_NUMERIC, $lc); 277 return $ret; 278 279 } 280 /** 281 * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format 282 * 283 * @param mixed $var any number, boolean, string, array, or object to be encoded. 284 * see argument 1 to Services_JSON() above for array-parsing behavior. 285 * if var is a strng, note that encode() always expects it 286 * to be in ASCII or UTF-8 format! 287 * 288 * @return mixed JSON string representation of input var or an error if a problem occurs 289 * @access public 290 */ 291 function _encode($var) 292 { 293 294 switch (gettype($var)) { 295 case 'boolean': 296 return $var ? 'true' : 'false'; 297 298 case 'NULL': 299 return 'null'; 300 301 case 'integer': 302 return (int) $var; 303 304 case 'double': 305 case 'float': 306 return (float) $var; 307 308 case 'string': 309 // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT 310 $ascii = ''; 311 $strlen_var = $this->strlen8($var); 312 313 /* 314 * Iterate over every character in the string, 315 * escaping with a slash or encoding to UTF-8 where necessary 316 */ 317 for ($c = 0; $c < $strlen_var; ++$c) { 318 319 $ord_var_c = ord($var{$c}); 320 321 switch (true) { 322 case $ord_var_c == 0x08: 323 $ascii .= '\b'; 324 break; 325 case $ord_var_c == 0x09: 326 $ascii .= '\t'; 327 break; 328 case $ord_var_c == 0x0A: 329 $ascii .= '\n'; 330 break; 331 case $ord_var_c == 0x0C: 332 $ascii .= '\f'; 333 break; 334 case $ord_var_c == 0x0D: 335 $ascii .= '\r'; 336 break; 337 338 case $ord_var_c == 0x22: 339 case $ord_var_c == 0x2F: 340 case $ord_var_c == 0x5C: 341 // double quote, slash, slosh 342 $ascii .= '\\'.$var{$c}; 343 break; 344 345 case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): 346 // characters U-00000000 - U-0000007F (same as ASCII) 347 $ascii .= $var{$c}; 348 break; 349 350 case (($ord_var_c & 0xE0) == 0xC0): 351 // characters U-00000080 - U-000007FF, mask 110XXXXX 352 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 353 if ($c+1 >= $strlen_var) { 354 $c += 1; 355 $ascii .= '?'; 356 break; 357 } 358 359 $char = pack('C*', $ord_var_c, ord($var{$c + 1})); 360 $c += 1; 361 $utf16 = $this->utf82utf16($char); 362 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 363 break; 364 365 case (($ord_var_c & 0xF0) == 0xE0): 366 if ($c+2 >= $strlen_var) { 367 $c += 2; 368 $ascii .= '?'; 369 break; 370 } 371 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 372 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 373 $char = pack('C*', $ord_var_c, 374 @ord($var{$c + 1}), 375 @ord($var{$c + 2})); 376 $c += 2; 377 $utf16 = $this->utf82utf16($char); 378 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 379 break; 380 381 case (($ord_var_c & 0xF8) == 0xF0): 382 if ($c+3 >= $strlen_var) { 383 $c += 3; 384 $ascii .= '?'; 385 break; 386 } 387 // characters U-00010000 - U-001FFFFF, mask 11110XXX 388 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 389 $char = pack('C*', $ord_var_c, 390 ord($var{$c + 1}), 391 ord($var{$c + 2}), 392 ord($var{$c + 3})); 393 $c += 3; 394 $utf16 = $this->utf82utf16($char); 395 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 396 break; 397 398 case (($ord_var_c & 0xFC) == 0xF8): 399 // characters U-00200000 - U-03FFFFFF, mask 111110XX 400 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 401 if ($c+4 >= $strlen_var) { 402 $c += 4; 403 $ascii .= '?'; 404 break; 405 } 406 $char = pack('C*', $ord_var_c, 407 ord($var{$c + 1}), 408 ord($var{$c + 2}), 409 ord($var{$c + 3}), 410 ord($var{$c + 4})); 411 $c += 4; 412 $utf16 = $this->utf82utf16($char); 413 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 414 break; 415 416 case (($ord_var_c & 0xFE) == 0xFC): 417 if ($c+5 >= $strlen_var) { 418 $c += 5; 419 $ascii .= '?'; 420 break; 421 } 422 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 423 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 424 $char = pack('C*', $ord_var_c, 425 ord($var{$c + 1}), 426 ord($var{$c + 2}), 427 ord($var{$c + 3}), 428 ord($var{$c + 4}), 429 ord($var{$c + 5})); 430 $c += 5; 431 $utf16 = $this->utf82utf16($char); 432 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 433 break; 434 } 435 } 436 return '"'.$ascii.'"'; 437 438 case 'array': 439 /* 440 * As per JSON spec if any array key is not an integer 441 * we must treat the the whole array as an object. We 442 * also try to catch a sparsely populated associative 443 * array with numeric keys here because some JS engines 444 * will create an array with empty indexes up to 445 * max_index which can cause memory issues and because 446 * the keys, which may be relevant, will be remapped 447 * otherwise. 448 * 449 * As per the ECMA and JSON specification an object may 450 * have any string as a property. Unfortunately due to 451 * a hole in the ECMA specification if the key is a 452 * ECMA reserved word or starts with a digit the 453 * parameter is only accessible using ECMAScript's 454 * bracket notation. 455 */ 456 457 // treat as a JSON object 458 if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { 459 $properties = array_map(array($this, 'name_value'), 460 array_keys($var), 461 array_values($var)); 462 463 foreach($properties as $property) { 464 if(Services_JSON::isError($property)) { 465 return $property; 466 } 467 } 468 469 return '{' . join(',', $properties) . '}'; 470 } 471 472 // treat it like a regular array 473 $elements = array_map(array($this, '_encode'), $var); 474 475 foreach($elements as $element) { 476 if(Services_JSON::isError($element)) { 477 return $element; 478 } 479 } 480 481 return '[' . join(',', $elements) . ']'; 482 483 case 'object': 484 485 // support toJSON methods. 486 if (($this->use & SERVICES_JSON_USE_TO_JSON) && method_exists($var, 'toJSON')) { 487 // this may end up allowing unlimited recursion 488 // so we check the return value to make sure it's not got the same method. 489 $recode = $var->toJSON(); 490 491 if (method_exists($recode, 'toJSON')) { 492 493 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) 494 ? 'null' 495 : new Services_JSON_Error(get_class($var). 496 " toJSON returned an object with a toJSON method."); 497 498 } 499 500 return $this->_encode( $recode ); 501 } 502 503 $vars = get_object_vars($var); 504 505 $properties = array_map(array($this, 'name_value'), 506 array_keys($vars), 507 array_values($vars)); 508 509 foreach($properties as $property) { 510 if(Services_JSON::isError($property)) { 511 return $property; 512 } 513 } 514 515 return '{' . join(',', $properties) . '}'; 516 517 default: 518 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) 519 ? 'null' 520 : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string"); 521 } 522 } 523 524 /** 525 * array-walking function for use in generating JSON-formatted name-value pairs 526 * 527 * @param string $name name of key to use 528 * @param mixed $value reference to an array element to be encoded 529 * 530 * @return string JSON-formatted name-value pair, like '"name":value' 531 * @access private 532 */ 533 function name_value($name, $value) 534 { 535 $encoded_value = $this->_encode($value); 536 537 if(Services_JSON::isError($encoded_value)) { 538 return $encoded_value; 539 } 540 541 return $this->_encode(strval($name)) . ':' . $encoded_value; 542 } 543 544 /** 545 * reduce a string by removing leading and trailing comments and whitespace 546 * 547 * @param $str string string value to strip of comments and whitespace 548 * 549 * @return string string value stripped of comments and whitespace 550 * @access private 551 */ 552 function reduce_string($str) 553 { 554 $str = preg_replace(array( 555 556 // eliminate single line comments in '// ...' form 557 '#^\s*//(.+)$#m', 558 559 // eliminate multi-line comments in '/* ... */' form, at start of string 560 '#^\s*/\*(.+)\*/#Us', 561 562 // eliminate multi-line comments in '/* ... */' form, at end of string 563 '#/\*(.+)\*/\s*$#Us' 564 565 ), '', $str); 566 567 // eliminate extraneous space 568 return trim($str); 569 } 570 571 /** 572 * decodes a JSON string into appropriate variable 573 * 574 * @param string $str JSON-formatted string 575 * 576 * @return mixed number, boolean, string, array, or object 577 * corresponding to given JSON input string. 578 * See argument 1 to Services_JSON() above for object-output behavior. 579 * Note that decode() always returns strings 580 * in ASCII or UTF-8 format! 581 * @access public 582 */ 583 function decode($str) 584 { 585 $str = $this->reduce_string($str); 586 587 switch (strtolower($str)) { 588 case 'true': 589 return true; 590 591 case 'false': 592 return false; 593 594 case 'null': 595 return null; 596 597 default: 598 $m = array(); 599 600 if (is_numeric($str)) { 601 // Lookie-loo, it's a number 602 603 // This would work on its own, but I'm trying to be 604 // good about returning integers where appropriate: 605 // return (float)$str; 606 607 // Return float or int, as appropriate 608 return ((float)$str == (integer)$str) 609 ? (integer)$str 610 : (float)$str; 611 612 } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { 613 // STRINGS RETURNED IN UTF-8 FORMAT 614 $delim = $this->substr8($str, 0, 1); 615 $chrs = $this->substr8($str, 1, -1); 616 $utf8 = ''; 617 $strlen_chrs = $this->strlen8($chrs); 618 619 for ($c = 0; $c < $strlen_chrs; ++$c) { 620 621 $substr_chrs_c_2 = $this->substr8($chrs, $c, 2); 622 $ord_chrs_c = ord($chrs{$c}); 623 624 switch (true) { 625 case $substr_chrs_c_2 == '\b': 626 $utf8 .= chr(0x08); 627 ++$c; 628 break; 629 case $substr_chrs_c_2 == '\t': 630 $utf8 .= chr(0x09); 631 ++$c; 632 break; 633 case $substr_chrs_c_2 == '\n': 634 $utf8 .= chr(0x0A); 635 ++$c; 636 break; 637 case $substr_chrs_c_2 == '\f': 638 $utf8 .= chr(0x0C); 639 ++$c; 640 break; 641 case $substr_chrs_c_2 == '\r': 642 $utf8 .= chr(0x0D); 643 ++$c; 644 break; 645 646 case $substr_chrs_c_2 == '\\"': 647 case $substr_chrs_c_2 == '\\\'': 648 case $substr_chrs_c_2 == '\\\\': 649 case $substr_chrs_c_2 == '\\/': 650 if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || 651 ($delim == "'" && $substr_chrs_c_2 != '\\"')) { 652 $utf8 .= $chrs{++$c}; 653 } 654 break; 655 656 case preg_match('/\\\u[0-9A-F]{4}/i', $this->substr8($chrs, $c, 6)): 657 // single, escaped unicode character 658 $utf16 = chr(hexdec($this->substr8($chrs, ($c + 2), 2))) 659 . chr(hexdec($this->substr8($chrs, ($c + 4), 2))); 660 $utf8 .= $this->utf162utf8($utf16); 661 $c += 5; 662 break; 663 664 case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): 665 $utf8 .= $chrs{$c}; 666 break; 667 668 case ($ord_chrs_c & 0xE0) == 0xC0: 669 // characters U-00000080 - U-000007FF, mask 110XXXXX 670 //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 671 $utf8 .= $this->substr8($chrs, $c, 2); 672 ++$c; 673 break; 674 675 case ($ord_chrs_c & 0xF0) == 0xE0: 676 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 677 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 678 $utf8 .= $this->substr8($chrs, $c, 3); 679 $c += 2; 680 break; 681 682 case ($ord_chrs_c & 0xF8) == 0xF0: 683 // characters U-00010000 - U-001FFFFF, mask 11110XXX 684 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 685 $utf8 .= $this->substr8($chrs, $c, 4); 686 $c += 3; 687 break; 688 689 case ($ord_chrs_c & 0xFC) == 0xF8: 690 // characters U-00200000 - U-03FFFFFF, mask 111110XX 691 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 692 $utf8 .= $this->substr8($chrs, $c, 5); 693 $c += 4; 694 break; 695 696 case ($ord_chrs_c & 0xFE) == 0xFC: 697 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 698 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 699 $utf8 .= $this->substr8($chrs, $c, 6); 700 $c += 5; 701 break; 702 703 } 704 705 } 706 707 return $utf8; 708 709 } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { 710 // array, or object notation 711 712 if ($str{0} == '[') { 713 $stk = array(SERVICES_JSON_IN_ARR); 714 $arr = array(); 715 } else { 716 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 717 $stk = array(SERVICES_JSON_IN_OBJ); 718 $obj = array(); 719 } else { 720 $stk = array(SERVICES_JSON_IN_OBJ); 721 $obj = new stdClass(); 722 } 723 } 724 725 array_push($stk, array('what' => SERVICES_JSON_SLICE, 726 'where' => 0, 727 'delim' => false)); 728 729 $chrs = $this->substr8($str, 1, -1); 730 $chrs = $this->reduce_string($chrs); 731 732 if ($chrs == '') { 733 if (reset($stk) == SERVICES_JSON_IN_ARR) { 734 return $arr; 735 736 } else { 737 return $obj; 738 739 } 740 } 741 742 //print("\nparsing {$chrs}\n"); 743 744 $strlen_chrs = $this->strlen8($chrs); 745 746 for ($c = 0; $c <= $strlen_chrs; ++$c) { 747 748 $top = end($stk); 749 $substr_chrs_c_2 = $this->substr8($chrs, $c, 2); 750 751 if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { 752 // found a comma that is not inside a string, array, etc., 753 // OR we've reached the end of the character list 754 $slice = $this->substr8($chrs, $top['where'], ($c - $top['where'])); 755 array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); 756 //print("Found split at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 757 758 if (reset($stk) == SERVICES_JSON_IN_ARR) { 759 // we are in an array, so just push an element onto the stack 760 array_push($arr, $this->decode($slice)); 761 762 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 763 // we are in an object, so figure 764 // out the property name and set an 765 // element in an associative array, 766 // for now 767 $parts = array(); 768 769 if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:/Uis', $slice, $parts)) { 770 // "name":value pair 771 $key = $this->decode($parts[1]); 772 $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B")); 773 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 774 $obj[$key] = $val; 775 } else { 776 $obj->$key = $val; 777 } 778 } elseif (preg_match('/^\s*(\w+)\s*:/Uis', $slice, $parts)) { 779 // name:value pair, where name is unquoted 780 $key = $parts[1]; 781 $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B")); 782 783 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 784 $obj[$key] = $val; 785 } else { 786 $obj->$key = $val; 787 } 788 } 789 790 } 791 792 } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { 793 // found a quote, and we are not inside a string 794 array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c})); 795 //print("Found start of string at {$c}\n"); 796 797 } elseif (($chrs{$c} == $top['delim']) && 798 ($top['what'] == SERVICES_JSON_IN_STR) && 799 (($this->strlen8($this->substr8($chrs, 0, $c)) - $this->strlen8(rtrim($this->substr8($chrs, 0, $c), '\\'))) % 2 != 1)) { 800 // found a quote, we're in a string, and it's not escaped 801 // we know that it's not escaped becase there is _not_ an 802 // odd number of backslashes at the end of the string so far 803 array_pop($stk); 804 //print("Found end of string at {$c}: ".$this->substr8($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); 805 806 } elseif (($chrs{$c} == '[') && 807 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 808 // found a left-bracket, and we are in an array, object, or slice 809 array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); 810 //print("Found start of array at {$c}\n"); 811 812 } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { 813 // found a right-bracket, and we're in an array 814 array_pop($stk); 815 //print("Found end of array at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 816 817 } elseif (($chrs{$c} == '{') && 818 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 819 // found a left-brace, and we are in an array, object, or slice 820 array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); 821 //print("Found start of object at {$c}\n"); 822 823 } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { 824 // found a right-brace, and we're in an object 825 array_pop($stk); 826 //print("Found end of object at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 827 828 } elseif (($substr_chrs_c_2 == '/*') && 829 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 830 // found a comment start, and we are in an array, object, or slice 831 array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); 832 $c++; 833 //print("Found start of comment at {$c}\n"); 834 835 } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { 836 // found a comment end, and we're in one now 837 array_pop($stk); 838 $c++; 839 840 for ($i = $top['where']; $i <= $c; ++$i) 841 $chrs = substr_replace($chrs, ' ', $i, 1); 842 843 //print("Found end of comment at {$c}: ".$this->substr8($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 844 845 } 846 847 } 848 849 if (reset($stk) == SERVICES_JSON_IN_ARR) { 850 return $arr; 851 852 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 853 return $obj; 854 855 } 856 857 } 858 } 859 } 860 861 /** 862 * @todo Ultimately, this should just call PEAR::isError() 863 */ 864 function isError($data, $code = null) 865 { 866 if (class_exists('pear')) { 867 return PEAR::isError($data, $code); 868 } elseif (is_object($data) && (get_class($data) == 'services_json_error' || 869 is_subclass_of($data, 'services_json_error'))) { 870 return true; 871 } 872 873 return false; 874 } 875 876 /** 877 * Calculates length of string in bytes 878 * @param string 879 * @return integer length 880 */ 881 function strlen8( $str ) 882 { 883 if ( $this->_mb_strlen ) { 884 return mb_strlen( $str, "8bit" ); 885 } 886 return strlen( $str ); 887 } 888 889 /** 890 * Returns part of a string, interpreting $start and $length as number of bytes. 891 * @param string 892 * @param integer start 893 * @param integer length 894 * @return integer length 895 */ 896 function substr8( $string, $start, $length=false ) 897 { 898 if ( $length === false ) { 899 $length = $this->strlen8( $string ) - $start; 900 } 901 if ( $this->_mb_substr ) { 902 return mb_substr( $string, $start, $length, "8bit" ); 903 } 904 return substr( $string, $start, $length ); 905 } 906 907 } 908 909 if (class_exists('PEAR_Error')) { 910 911 class Services_JSON_Error extends PEAR_Error 912 { 913 function Services_JSON_Error($message = 'unknown error', $code = null, 914 $mode = null, $options = null, $userinfo = null) 915 { 916 parent::PEAR_Error($message, $code, $mode, $options, $userinfo); 917 } 918 } 919 920 } else { 921 922 /** 923 * @todo Ultimately, this class shall be descended from PEAR_Error 924 */ 925 class Services_JSON_Error 926 { 927 function Services_JSON_Error($message = 'unknown error', $code = null, 928 $mode = null, $options = null, $userinfo = null) 929 { 930 931 } 932 } 933 934 } 935 936 endif;
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| Generated: Tue Mar 25 01:41:18 2014 | WordPress honlapkészítés: online1.hu |