source: documentation/trunk/packages/dokuwiki-2011-05-25a/inc/JSON.php@ 25027

Last change on this file since 25027 was 25027, checked in by jmt12, 12 years ago

Adding the packages directory, and within it a configured version of dokuwiki all ready to run
File size: 28.1 KB
Line 
1<?php
2/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
3
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 * PHP versions 4 and 5
28 *
29 * LICENSE: Redistribution and use in source and binary forms, with or
30 * without modification, are permitted provided that the following
31 * conditions are met: Redistributions of source code must retain the
32 * above copyright notice, this list of conditions and the following
33 * disclaimer. Redistributions in binary form must reproduce the above
34 * copyright notice, this list of conditions and the following disclaimer
35 * in the documentation and/or other materials provided with the
36 * distribution.
37 *
38 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
39 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
40 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
41 * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
42 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
43 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
44 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
46 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
47 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
48 * DAMAGE.
49 *
50 * @category
51 * @package
52 * @author Michal Migurski <[email protected]>
53 * @author Matt Knapp <mdknapp[at]gmail[dot]com>
54 * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
55 * @copyright 2005 Michal Migurski
56 * @license http://www.freebsd.org/copyright/freebsd-license.html
57 * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198
58 */
59
60// for DokuWiki
61if(!defined('DOKU_INC')) die('meh.');
62
63/**
64 * Marker constant for JSON::decode(), used to flag stack state
65 */
66define('JSON_SLICE', 1);
67
68/**
69 * Marker constant for JSON::decode(), used to flag stack state
70 */
71define('JSON_IN_STR', 2);
72
73/**
74 * Marker constant for JSON::decode(), used to flag stack state
75 */
76define('JSON_IN_ARR', 4);
77
78/**
79 * Marker constant for JSON::decode(), used to flag stack state
80 */
81define('JSON_IN_OBJ', 8);
82
83/**
84 * Marker constant for JSON::decode(), used to flag stack state
85 */
86define('JSON_IN_CMT', 16);
87
88/**
89 * Behavior switch for JSON::decode()
90 */
91define('JSON_LOOSE_TYPE', 10);
92
93/**
94 * Behavior switch for JSON::decode()
95 */
96define('JSON_STRICT_TYPE', 11);
97
98/**
99 * Converts to and from JSON format.
100 *
101 * @category
102 * @package
103 * @author Michal Migurski <[email protected]>
104 * @author Matt Knapp <mdknapp[at]gmail[dot]com>
105 * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
106 * @copyright 2005 Michal Migurski
107 * @license http://www.php.net/license/3_0.txt PHP License 3.0
108 * @version
109 * @link
110 * @see
111 * @since
112 * @deprecated
113 */
114class JSON {
115
116 /**
117 * Disables the use of PHP5's native json_decode()
118 *
119 * You shouldn't change this usually because the native function is much
120 * faster. However, this non-native will also parse slightly broken JSON
121 * which might be handy when talking to a non-conform endpoint
122 */
123 public $skipnative = false;
124
125 /**
126 * constructs a new JSON instance
127 *
128 * @param int $use object behavior: when encoding or decoding,
129 * be loose or strict about object/array usage
130 *
131 * possible values:
132 * JSON_STRICT_TYPE - strict typing, default
133 * "{...}" syntax creates objects in decode.
134 * JSON_LOOSE_TYPE - loose typing
135 * "{...}" syntax creates associative arrays in decode.
136 */
137 function JSON($use=JSON_STRICT_TYPE) {
138 $this->use = $use;
139 }
140
141 /**
142 * encodes an arbitrary variable into JSON format
143 * If available the native PHP JSON implementation is used.
144 *
145 * @param mixed $var any number, boolean, string, array, or object to be encoded.
146 * see argument 1 to JSON() above for array-parsing behavior.
147 * if var is a strng, note that encode() always expects it
148 * to be in ASCII or UTF-8 format!
149 *
150 * @return string JSON string representation of input var
151 * @access public
152 */
153 function encode($var) {
154 if (function_exists('json_encode')) return json_encode($var);
155 switch (gettype($var)) {
156 case 'boolean':
157 return $var ? 'true' : 'false';
158
159 case 'NULL':
160 return 'null';
161
162 case 'integer':
163 return sprintf('%d', $var);
164
165 case 'double':
166 case 'float':
167 return sprintf('%f', $var);
168
169 case 'string':
170 // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
171 $ascii = '';
172 $strlen_var = strlen($var);
173
174 /*
175 * Iterate over every character in the string,
176 * escaping with a slash or encoding to UTF-8 where necessary
177 */
178 for ($c = 0; $c < $strlen_var; ++$c) {
179
180 $ord_var_c = ord($var{$c});
181
182 switch ($ord_var_c) {
183 case 0x08:
184 $ascii .= '\b';
185 break;
186 case 0x09:
187 $ascii .= '\t';
188 break;
189 case 0x0A:
190 $ascii .= '\n';
191 break;
192 case 0x0C:
193 $ascii .= '\f';
194 break;
195 case 0x0D:
196 $ascii .= '\r';
197 break;
198
199 case 0x22:
200 case 0x2F:
201 case 0x5C:
202 // double quote, slash, slosh
203 $ascii .= '\\'.$var{$c};
204 break;
205
206 case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
207 // characters U-00000000 - U-0000007F (same as ASCII)
208 $ascii .= $var{$c};
209 break;
210
211 case (($ord_var_c & 0xE0) == 0xC0):
212 // characters U-00000080 - U-000007FF, mask 110XXXXX
213 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
214 $char = pack('C*', $ord_var_c, ord($var{$c+1}));
215 $c+=1;
216 //$utf16 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
217 $utf16 = utf8_to_utf16be($char);
218 $ascii .= sprintf('\u%04s', bin2hex($utf16));
219 break;
220
221 case (($ord_var_c & 0xF0) == 0xE0):
222 // characters U-00000800 - U-0000FFFF, mask 1110XXXX
223 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
224 $char = pack('C*', $ord_var_c,
225 ord($var{$c+1}),
226 ord($var{$c+2}));
227 $c+=2;
228 //$utf16 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
229 $utf16 = utf8_to_utf16be($char);
230 $ascii .= sprintf('\u%04s', bin2hex($utf16));
231 break;
232
233 case (($ord_var_c & 0xF8) == 0xF0):
234 // characters U-00010000 - U-001FFFFF, mask 11110XXX
235 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
236 $char = pack('C*', $ord_var_c,
237 ord($var{$c+1}),
238 ord($var{$c+2}),
239 ord($var{$c+3}));
240 $c+=3;
241 //$utf16 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
242 $utf16 = utf8_to_utf16be($char);
243 $ascii .= sprintf('\u%04s', bin2hex($utf16));
244 break;
245
246 case (($ord_var_c & 0xFC) == 0xF8):
247 // characters U-00200000 - U-03FFFFFF, mask 111110XX
248 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
249 $char = pack('C*', $ord_var_c,
250 ord($var{$c+1}),
251 ord($var{$c+2}),
252 ord($var{$c+3}),
253 ord($var{$c+4}));
254 $c+=4;
255 //$utf16 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
256 $utf16 = utf8_to_utf16be($char);
257 $ascii .= sprintf('\u%04s', bin2hex($utf16));
258 break;
259
260 case (($ord_var_c & 0xFE) == 0xFC):
261 // characters U-04000000 - U-7FFFFFFF, mask 1111110X
262 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
263 $char = pack('C*', $ord_var_c,
264 ord($var{$c+1}),
265 ord($var{$c+2}),
266 ord($var{$c+3}),
267 ord($var{$c+4}),
268 ord($var{$c+5}));
269 $c+=5;
270 //$utf16 = mb_convert_encoding($char, 'UTF-16', 'UTF-8');
271 $utf16 = utf8_to_utf16be($char);
272 $ascii .= sprintf('\u%04s', bin2hex($utf16));
273 break;
274 }
275 }
276
277 return '"'.$ascii.'"';
278
279 case 'array':
280 /*
281 * As per JSON spec if any array key is not an integer
282 * we must treat the the whole array as an object. We
283 * also try to catch a sparsely populated associative
284 * array with numeric keys here because some JS engines
285 * will create an array with empty indexes up to
286 * max_index which can cause memory issues and because
287 * the keys, which may be relevant, will be remapped
288 * otherwise.
289 *
290 * As per the ECMA and JSON specification an object may
291 * have any string as a property. Unfortunately due to
292 * a hole in the ECMA specification if the key is a
293 * ECMA reserved word or starts with a digit the
294 * parameter is only accessible using ECMAScript's
295 * bracket notation.
296 */
297
298 // treat as a JSON object
299 if (is_array($var) && count($var) && (array_keys($var) !== range(0, count($var) - 1))) {
300 return sprintf('{%s}', join(',', array_map(array($this, 'name_value'),
301 array_keys($var),
302 array_values($var))));
303 }
304
305 // treat it like a regular array
306 return sprintf('[%s]', join(',', array_map(array($this, 'encode'), $var)));
307
308 case 'object':
309 $vars = get_object_vars($var);
310 return sprintf('{%s}', join(',', array_map(array($this, 'name_value'),
311 array_keys($vars),
312 array_values($vars))));
313
314 default:
315 return '';
316 }
317 }
318
319 /**
320 * encodes an arbitrary variable into JSON format, alias for encode()
321 */
322 function enc($var) {
323 return $this->encode($var);
324 }
325
326 /** function name_value
327 * array-walking function for use in generating JSON-formatted name-value pairs
328 *
329 * @param string $name name of key to use
330 * @param mixed $value reference to an array element to be encoded
331 *
332 * @return string JSON-formatted name-value pair, like '"name":value'
333 * @access private
334 */
335 function name_value($name, $value) {
336 return (sprintf("%s:%s", $this->encode(strval($name)), $this->encode($value)));
337 }
338
339 /**
340 * reduce a string by removing leading and trailing comments and whitespace
341 *
342 * @param $str string string value to strip of comments and whitespace
343 *
344 * @return string string value stripped of comments and whitespace
345 * @access private
346 */
347 function reduce_string($str) {
348 $str = preg_replace(array(
349
350 // eliminate single line comments in '// ...' form
351 '#^\s*//(.+)$#m',
352
353 // eliminate multi-line comments in '/* ... */' form, at start of string
354 '#^\s*/\*(.+)\*/#Us',
355
356 // eliminate multi-line comments in '/* ... */' form, at end of string
357 '#/\*(.+)\*/\s*$#Us'
358
359 ), '', $str);
360
361 // eliminate extraneous space
362 return trim($str);
363 }
364
365 /**
366 * decodes a JSON string into appropriate variable
367 * If available the native PHP JSON implementation is used.
368 *
369 * @param string $str JSON-formatted string
370 *
371 * @return mixed number, boolean, string, array, or object
372 * corresponding to given JSON input string.
373 * See argument 1 to JSON() above for object-output behavior.
374 * Note that decode() always returns strings
375 * in ASCII or UTF-8 format!
376 * @access public
377 */
378 function decode($str) {
379 if (!$this->skipnative && function_exists('json_decode')){
380 return json_decode($str,($this->use == JSON_LOOSE_TYPE));
381 }
382
383 $str = $this->reduce_string($str);
384
385 switch (strtolower($str)) {
386 case 'true':
387 return true;
388
389 case 'false':
390 return false;
391
392 case 'null':
393 return null;
394
395 default:
396 if (is_numeric($str)) {
397 // Lookie-loo, it's a number
398
399 // This would work on its own, but I'm trying to be
400 // good about returning integers where appropriate:
401 // return (float)$str;
402
403 // Return float or int, as appropriate
404 return ((float)$str == (integer)$str)
405 ? (integer)$str
406 : (float)$str;
407
408 } elseif (preg_match('/^("|\').+("|\')$/s', $str, $m) && $m[1] == $m[2]) {
409 // STRINGS RETURNED IN UTF-8 FORMAT
410 $delim = substr($str, 0, 1);
411 $chrs = substr($str, 1, -1);
412 $utf8 = '';
413 $strlen_chrs = strlen($chrs);
414
415 for ($c = 0; $c < $strlen_chrs; ++$c) {
416
417 $substr_chrs_c_2 = substr($chrs, $c, 2);
418 $ord_chrs_c = ord($chrs{$c});
419
420 switch ($substr_chrs_c_2) {
421 case '\b':
422 $utf8 .= chr(0x08);
423 $c+=1;
424 break;
425 case '\t':
426 $utf8 .= chr(0x09);
427 $c+=1;
428 break;
429 case '\n':
430 $utf8 .= chr(0x0A);
431 $c+=1;
432 break;
433 case '\f':
434 $utf8 .= chr(0x0C);
435 $c+=1;
436 break;
437 case '\r':
438 $utf8 .= chr(0x0D);
439 $c+=1;
440 break;
441
442 case '\\"':
443 case '\\\'':
444 case '\\\\':
445 case '\\/':
446 if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
447 ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
448 $utf8 .= $chrs{++$c};
449 }
450 break;
451
452 default:
453 if (preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6))) {
454 // single, escaped unicode character
455 $utf16 = chr(hexdec(substr($chrs, ($c+2), 2)))
456 . chr(hexdec(substr($chrs, ($c+4), 2)));
457 //$utf8 .= mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
458 $utf8 .= utf16be_to_utf8($utf16);
459 $c+=5;
460
461 } elseif(($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F)) {
462 $utf8 .= $chrs{$c};
463
464 } elseif(($ord_chrs_c & 0xE0) == 0xC0) {
465 // characters U-00000080 - U-000007FF, mask 110XXXXX
466 //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
467 $utf8 .= substr($chrs, $c, 2);
468 $c += 1;
469
470 } elseif(($ord_chrs_c & 0xF0) == 0xE0) {
471 // characters U-00000800 - U-0000FFFF, mask 1110XXXX
472 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
473 $utf8 .= substr($chrs, $c, 3);
474 $c += 2;
475
476 } elseif(($ord_chrs_c & 0xF8) == 0xF0) {
477 // characters U-00010000 - U-001FFFFF, mask 11110XXX
478 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
479 $utf8 .= substr($chrs, $c, 4);
480 $c += 3;
481
482 } elseif(($ord_chrs_c & 0xFC) == 0xF8) {
483 // characters U-00200000 - U-03FFFFFF, mask 111110XX
484 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
485 $utf8 .= substr($chrs, $c, 5);
486 $c += 4;
487
488 } elseif(($ord_chrs_c & 0xFE) == 0xFC) {
489 // characters U-04000000 - U-7FFFFFFF, mask 1111110X
490 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
491 $utf8 .= substr($chrs, $c, 6);
492 $c += 5;
493
494 }
495 break;
496
497 }
498
499 }
500
501 return $utf8;
502
503 } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
504 // array, or object notation
505
506 if ($str{0} == '[') {
507 $stk = array(JSON_IN_ARR);
508 $arr = array();
509 } else {
510 if ($this->use == JSON_LOOSE_TYPE) {
511 $stk = array(JSON_IN_OBJ);
512 $obj = array();
513 } else {
514 $stk = array(JSON_IN_OBJ);
515 $obj = new stdClass();
516 }
517 }
518
519 array_push($stk, array('what' => JSON_SLICE,
520 'where' => 0,
521 'delim' => false));
522
523 $chrs = substr($str, 1, -1);
524 $chrs = $this->reduce_string($chrs);
525
526 if ($chrs == '') {
527 if (reset($stk) == JSON_IN_ARR) {
528 return $arr;
529
530 } else {
531 return $obj;
532
533 }
534 }
535
536 //print("\nparsing {$chrs}\n");
537
538 $strlen_chrs = strlen($chrs);
539
540 for ($c = 0; $c <= $strlen_chrs; ++$c) {
541
542 $top = end($stk);
543 $substr_chrs_c_2 = substr($chrs, $c, 2);
544
545 if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == JSON_SLICE))) {
546 // found a comma that is not inside a string, array, etc.,
547 // OR we've reached the end of the character list
548 $slice = substr($chrs, $top['where'], ($c - $top['where']));
549 array_push($stk, array('what' => JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
550 //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
551
552 if (reset($stk) == JSON_IN_ARR) {
553 // we are in an array, so just push an element onto the stack
554 array_push($arr, $this->decode($slice));
555
556 } elseif (reset($stk) == JSON_IN_OBJ) {
557 // we are in an object, so figure
558 // out the property name and set an
559 // element in an associative array,
560 // for now
561 if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
562 // "name":value pair
563 $key = $this->decode($parts[1]);
564 $val = $this->decode($parts[2]);
565
566 if ($this->use == JSON_LOOSE_TYPE) {
567 $obj[$key] = $val;
568 } else {
569 $obj->$key = $val;
570 }
571 } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
572 // name:value pair, where name is unquoted
573 $key = $parts[1];
574 $val = $this->decode($parts[2]);
575
576 if ($this->use == JSON_LOOSE_TYPE) {
577 $obj[$key] = $val;
578 } else {
579 $obj->$key = $val;
580 }
581 }
582
583 }
584
585 } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) &&
586 in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
587 // found a quote, and we are not inside a string
588 array_push($stk, array('what' => JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
589 //print("Found start of string at {$c}\n");
590
591 } elseif (($chrs{$c} == $top['delim']) &&
592 ($top['what'] == JSON_IN_STR) &&
593 (($chrs{$c - 1} != "\\") ||
594 ($chrs{$c - 1} == "\\" && $chrs{$c - 2} == "\\"))) {
595 // found a quote, we're in a string, and it's not escaped
596 array_pop($stk);
597 //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
598
599 } elseif (($chrs{$c} == '[') &&
600 in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
601 // found a left-bracket, and we are in an array, object, or slice
602 array_push($stk, array('what' => JSON_IN_ARR, 'where' => $c, 'delim' => false));
603 //print("Found start of array at {$c}\n");
604
605 } elseif (($chrs{$c} == ']') && ($top['what'] == JSON_IN_ARR)) {
606 // found a right-bracket, and we're in an array
607 array_pop($stk);
608 //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
609
610 } elseif (($chrs{$c} == '{') &&
611 in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
612 // found a left-brace, and we are in an array, object, or slice
613 array_push($stk, array('what' => JSON_IN_OBJ, 'where' => $c, 'delim' => false));
614 //print("Found start of object at {$c}\n");
615
616 } elseif (($chrs{$c} == '}') && ($top['what'] == JSON_IN_OBJ)) {
617 // found a right-brace, and we're in an object
618 array_pop($stk);
619 //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
620
621 } elseif (($substr_chrs_c_2 == '/*') &&
622 in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
623 // found a comment start, and we are in an array, object, or slice
624 array_push($stk, array('what' => JSON_IN_CMT, 'where' => $c, 'delim' => false));
625 $c++;
626 //print("Found start of comment at {$c}\n");
627
628 } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == JSON_IN_CMT)) {
629 // found a comment end, and we're in one now
630 array_pop($stk);
631 $c++;
632
633 for ($i = $top['where']; $i <= $c; ++$i)
634 $chrs = substr_replace($chrs, ' ', $i, 1);
635
636 //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
637
638 }
639
640 }
641
642 if (reset($stk) == JSON_IN_ARR) {
643 return $arr;
644
645 } elseif (reset($stk) == JSON_IN_OBJ) {
646 return $obj;
647
648 }
649
650 }
651 }
652 }
653
654 /**
655 * decodes a JSON string into appropriate variable; alias for decode()
656 */
657 function dec($var) {
658 return $this->decode($var);
659 }
660}
661
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