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/Phool/Web/ -> JSON.php (source)

   1  <?php
   2  /**
   3  * @category phool
   4  * @package phool
   5  */
   6  //============================================================================
   7  /**
   8  * This file is adapted from the PEAR Services_JSON package version 1.0.3,
   9  * available at http://pear.php.net/package/Services_JSON.
  10  *
  11  * Changes from PEAR version:
  12  *        - switch to PHP 5 object syntax
  13  *        - make independant from PEAR error handling using exceptions . Also
  14  *          remove SERVICES_JSON_SUPPRESS_ERRORS flag (replace with a try/catch
  15  *          construct)
  16  */
  17  
  18  namespace Phool\Web;
  19  
  20  /**
  21   * Converts to and from JSON format.
  22   *
  23   * JSON (JavaScript Object Notation) is a lightweight data-interchange
  24   * format. It is easy for humans to read and write. It is easy for machines
  25   * to parse and generate. It is based on a subset of the JavaScript
  26   * Programming Language, Standard ECMA-262 3rd Edition - December 1999.
  27   * This feature can also be found in  Python. JSON is a text format that is
  28   * completely language independent but uses conventions that are familiar
  29   * to programmers of the C-family of languages, including C, C++, C#, Java,
  30   * JavaScript, Perl, TCL, and many others. These properties make JSON an
  31   * ideal data-interchange language.
  32   *
  33   * This package provides a simple encoder and decoder for JSON notation. It
  34   * is intended for use with client-side Javascript applications that make
  35   * use of HTTPRequest to perform server communication functions - data can
  36   * be encoded into JSON notation for use in a client-side javascript, or
  37   * decoded from incoming Javascript requests. JSON format is native to
  38   * Javascript, and can be directly eval()'ed with no further parsing
  39   * overhead
  40   *
  41   * All strings should be in ASCII or UTF-8 format!
  42   *
  43   * LICENSE: Redistribution and use in source and binary forms, with or
  44   * without modification, are permitted provided that the following
  45   * conditions are met: Redistributions of source code must retain the
  46   * above copyright notice, this list of conditions and the following
  47   * disclaimer. Redistributions in binary form must reproduce the above
  48   * copyright notice, this list of conditions and the following disclaimer
  49   * in the documentation and/or other materials provided with the
  50   * distribution.
  51   *
  52   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  53   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  54   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  55   * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  56   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  57   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  58   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  59   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  60   * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  61   * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  62   * DAMAGE.
  63   *
  64   * @category
  65   * @package     Services_JSON
  66   * @author      Michal Migurski <mike-json@teczno.com>
  67   * @author      Matt Knapp <mdknapp[at]gmail[dot]com>
  68   * @author      Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
  69   * @author      Francois Laupretre <francois@tekwire.net>
  70   * @copyright   2005 Michal Migurski
  71   * @version     CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp $
  72   * @license     http://www.opensource.org/licenses/bsd-license.php
  73   * @link        http://pear.php.net/pepr/pepr-proposal-show.php?id=198
  74   */
  75  
  76  /**
  77   * Marker constant for Services_JSON::decode(), used to flag stack state
  78   */
  79  const SERVICES_JSON_SLICE=1;
  80  
  81  /**
  82   * Marker constant for Services_JSON::decode(), used to flag stack state
  83   */
  84  const SERVICES_JSON_IN_STR=2;
  85  
  86  /**
  87   * Marker constant for Services_JSON::decode(), used to flag stack state
  88   */
  89  const SERVICES_JSON_IN_ARR=3;
  90  
  91  /**
  92   * Marker constant for Services_JSON::decode(), used to flag stack state
  93   */
  94  const SERVICES_JSON_IN_OBJ=4;
  95  
  96  /**
  97   * Marker constant for Services_JSON::decode(), used to flag stack state
  98   */
  99  const SERVICES_JSON_IN_CMT=5;
 100  
 101  /**
 102   * Behavior switch for Services_JSON::decode()
 103   */
 104  const SERVICES_JSON_LOOSE_TYPE=16;
 105  
 106  /**
 107   * Converts to and from JSON format.
 108   *
 109   * Brief example of use:
 110   *
 111   * <code>
 112   * // create a new instance of Services_JSON
 113   * $json = new \Phool\Web\Services_JSON();
 114   *
 115   * // convert a complexe value to JSON notation, and send it to the browser
 116   * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
 117   * $output = $json->encode($value);
 118   *
 119   * print($output);
 120   * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
 121   *
 122   * // accept incoming POST data, assumed to be in JSON notation
 123   * $input = file_get_contents('php://input', 1000000);
 124   * $value = $json->decode($input);
 125   * </code>
 126   */
 127  class Services_JSON
 128  {
 129     /**
 130      * constructs a new JSON instance
 131      */
 132  
 133      /** @var int object behavior flags; combine with boolean-OR */
 134  
 135      private $use;
 136  
 137      /**
 138      * @param    int     $use    object behavior flags; combine with boolean-OR
 139      *
 140      *                           possible values:
 141      *                           - SERVICES_JSON_LOOSE_TYPE:  loose typing.
 142      *                                   "{...}" syntax creates associative arrays
 143      *                                   instead of objects in decode().
 144      */
 145      public function __construct($use = 0)
 146      {
 147          $this->use = $use;
 148      }
 149  
 150     /**
 151      * convert a string from one UTF-16 char to one UTF-8 char
 152      *
 153      * Normally should be handled by mb_convert_encoding, but
 154      * provides a slower PHP-only method for installations
 155      * that lack the multibye string extension.
 156      *
 157      * @param    string  $utf16  UTF-16 character
 158      * @return   string  UTF-8 character
 159      */
 160      private function utf162utf8($utf16)
 161      {
 162          // oh please oh please oh please oh please oh please
 163          if(function_exists('mb_convert_encoding')) {
 164              return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
 165          }
 166  
 167          $bytes = (ord($utf16{0}) << 8) | ord($utf16{1});
 168  
 169          switch(true) {
 170              case ((0x7F & $bytes) == $bytes):
 171                  // this case should never be reached, because we are in ASCII range
 172                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 173                  return chr(0x7F & $bytes);
 174  
 175              case (0x07FF & $bytes) == $bytes:
 176                  // return a 2-byte UTF-8 character
 177                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 178                  return chr(0xC0 | (($bytes >> 6) & 0x1F))
 179                       . chr(0x80 | ($bytes & 0x3F));
 180  
 181              case (0xFFFF & $bytes) == $bytes:
 182                  // return a 3-byte UTF-8 character
 183                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 184                  return chr(0xE0 | (($bytes >> 12) & 0x0F))
 185                       . chr(0x80 | (($bytes >> 6) & 0x3F))
 186                       . chr(0x80 | ($bytes & 0x3F));
 187          }
 188  
 189          // ignoring UTF-32 for now, sorry
 190          return '';
 191      }
 192  
 193     /**
 194      * convert a string from one UTF-8 char to one UTF-16 char
 195      *
 196      * Normally should be handled by mb_convert_encoding, but
 197      * provides a slower PHP-only method for installations
 198      * that lack the multibye string extension.
 199      *
 200      * @param    string  $utf8   UTF-8 character
 201      * @return   string  UTF-16 character
 202      */
 203      private function utf82utf16($utf8)
 204      {
 205          // oh please oh please oh please oh please oh please
 206          if(function_exists('mb_convert_encoding')) {
 207              return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
 208          }
 209  
 210          switch(strlen($utf8)) {
 211              case 1:
 212                  // this case should never be reached, because we are in ASCII range
 213                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 214                  return $utf8;
 215  
 216              case 2:
 217                  // return a UTF-16 character from a 2-byte UTF-8 char
 218                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 219                  return chr(0x07 & (ord($utf8{0}) >> 2))
 220                       . chr((0xC0 & (ord($utf8{0}) << 6))
 221                           | (0x3F & ord($utf8{1})));
 222  
 223              case 3:
 224                  // return a UTF-16 character from a 3-byte UTF-8 char
 225                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 226                  return chr((0xF0 & (ord($utf8{0}) << 4))
 227                           | (0x0F & (ord($utf8{1}) >> 2)))
 228                       . chr((0xC0 & (ord($utf8{1}) << 6))
 229                           | (0x7F & ord($utf8{2})));
 230          }
 231  
 232          // ignoring UTF-32 for now, sorry
 233          return '';
 234      }
 235  
 236     /**
 237      * encodes an arbitrary variable into JSON format
 238      *
 239      * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
 240      *                           see argument 1 to Services_JSON() above for array-parsing behavior.
 241      *                           if var is a strng, note that encode() always expects it
 242      *                           to be in ASCII or UTF-8 format!
 243      *
 244      * @return   mixed   JSON string representation of input var
 245      * @throws Exception if a problem occurs
 246      */
 247      public function encode($var)
 248      {
 249          switch (gettype($var)) {
 250              case 'boolean':
 251                  return $var ? 'true' : 'false';
 252  
 253              case 'NULL':
 254                  return 'null';
 255  
 256              case 'integer':
 257                  return (int) $var;
 258  
 259              case 'double':
 260              case 'float':
 261                  return (float) $var;
 262  
 263              case 'string':
 264                  // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
 265                  $ascii = '';
 266                  $strlen_var = strlen($var);
 267  
 268                 /*
 269                  * Iterate over every character in the string,
 270                  * escaping with a slash or encoding to UTF-8 where necessary
 271                  */
 272                  for ($c = 0; $c < $strlen_var; ++$c) {
 273  
 274                      $ord_var_c = ord($var{$c});
 275  
 276                      switch (true) {
 277                          case $ord_var_c == 0x08:
 278                              $ascii .= '\b';
 279                              break;
 280                          case $ord_var_c == 0x09:
 281                              $ascii .= '\t';
 282                              break;
 283                          case $ord_var_c == 0x0A:
 284                              $ascii .= '\n';
 285                              break;
 286                          case $ord_var_c == 0x0C:
 287                              $ascii .= '\f';
 288                              break;
 289                          case $ord_var_c == 0x0D:
 290                              $ascii .= '\r';
 291                              break;
 292  
 293                          case $ord_var_c == 0x22:
 294                          case $ord_var_c == 0x2F:
 295                          case $ord_var_c == 0x5C:
 296                              // double quote, slash, slosh
 297                              $ascii .= '\\'.$var{$c};
 298                              break;
 299  
 300                          case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
 301                              // characters U-00000000 - U-0000007F (same as ASCII)
 302                              $ascii .= $var{$c};
 303                              break;
 304  
 305                          case (($ord_var_c & 0xE0) == 0xC0):
 306                              // characters U-00000080 - U-000007FF, mask 110XXXXX
 307                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 308                              $char = pack('C*', $ord_var_c, ord($var{$c + 1}));
 309                              $c += 1;
 310                              $utf16 = $this->utf82utf16($char);
 311                              $ascii .= sprintf('\u%04s', bin2hex($utf16));
 312                              break;
 313  
 314                          case (($ord_var_c & 0xF0) == 0xE0):
 315                              // characters U-00000800 - U-0000FFFF, mask 1110XXXX
 316                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 317                              $char = pack('C*', $ord_var_c,
 318                                           ord($var{$c + 1}),
 319                                           ord($var{$c + 2}));
 320                              $c += 2;
 321                              $utf16 = $this->utf82utf16($char);
 322                              $ascii .= sprintf('\u%04s', bin2hex($utf16));
 323                              break;
 324  
 325                          case (($ord_var_c & 0xF8) == 0xF0):
 326                              // characters U-00010000 - U-001FFFFF, mask 11110XXX
 327                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 328                              $char = pack('C*', $ord_var_c,
 329                                           ord($var{$c + 1}),
 330                                           ord($var{$c + 2}),
 331                                           ord($var{$c + 3}));
 332                              $c += 3;
 333                              $utf16 = $this->utf82utf16($char);
 334                              $ascii .= sprintf('\u%04s', bin2hex($utf16));
 335                              break;
 336  
 337                          case (($ord_var_c & 0xFC) == 0xF8):
 338                              // characters U-00200000 - U-03FFFFFF, mask 111110XX
 339                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 340                              $char = pack('C*', $ord_var_c,
 341                                           ord($var{$c + 1}),
 342                                           ord($var{$c + 2}),
 343                                           ord($var{$c + 3}),
 344                                           ord($var{$c + 4}));
 345                              $c += 4;
 346                              $utf16 = $this->utf82utf16($char);
 347                              $ascii .= sprintf('\u%04s', bin2hex($utf16));
 348                              break;
 349  
 350                          case (($ord_var_c & 0xFE) == 0xFC):
 351                              // characters U-04000000 - U-7FFFFFFF, mask 1111110X
 352                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 353                              $char = pack('C*', $ord_var_c,
 354                                           ord($var{$c + 1}),
 355                                           ord($var{$c + 2}),
 356                                           ord($var{$c + 3}),
 357                                           ord($var{$c + 4}),
 358                                           ord($var{$c + 5}));
 359                              $c += 5;
 360                              $utf16 = $this->utf82utf16($char);
 361                              $ascii .= sprintf('\u%04s', bin2hex($utf16));
 362                              break;
 363                      }
 364                  }
 365  
 366                  return '"'.$ascii.'"';
 367  
 368              case 'array':
 369                 /*
 370                  * As per JSON spec if any array key is not an integer
 371                  * we must treat the the whole array as an object. We
 372                  * also try to catch a sparsely populated associative
 373                  * array with numeric keys here because some JS engines
 374                  * will create an array with empty indexes up to
 375                  * max_index which can cause memory issues and because
 376                  * the keys, which may be relevant, will be remapped
 377                  * otherwise.
 378                  *
 379                  * As per the ECMA and JSON specification an object may
 380                  * have any string as a property. Unfortunately due to
 381                  * a hole in the ECMA specification if the key is a
 382                  * ECMA reserved word or starts with a digit the
 383                  * parameter is only accessible using ECMAScript's
 384                  * bracket notation.
 385                  */
 386  
 387                  // treat as a JSON object
 388                  if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {
 389                      $properties = array_map(array($this, 'name_value'),
 390                                              array_keys($var),
 391                                              array_values($var));
 392                      return '{' . join(',', $properties) . '}';
 393                  }
 394  
 395                  // treat it like a regular array
 396                  $elements = array_map(array($this, 'encode'), $var);
 397                  return '[' . join(',', $elements) . ']';
 398  
 399              case 'object':
 400                  $vars = get_object_vars($var);
 401  
 402                  $properties = array_map(array($this, 'name_value'),
 403                                          array_keys($vars),
 404                                          array_values($vars));
 405                  return '{' . join(',', $properties) . '}';
 406  
 407              default:
 408                   throw new \Exception(gettype($var)." can not be encoded as JSON string");
 409          }
 410      }
 411  
 412     /**
 413      * array-walking function for use in generating JSON-formatted name-value pairs
 414      *
 415      * @param    string  $name   name of key to use
 416      * @param    mixed   $value  reference to an array element to be encoded
 417      *
 418      * @return   string  JSON-formatted name-value pair, like '"name":value'
 419      */
 420      private function name_value($name, $value)
 421      {
 422          return $this->encode(strval($name)) . ':' . $this->encode($value);
 423      }
 424  
 425     /**
 426      * reduce a string by removing leading and trailing comments and whitespace
 427      *
 428      * @param    $str    string      string value to strip of comments and whitespace
 429      *
 430      * @return   string  string value stripped of comments and whitespace
 431      */
 432      private function reduce_string($str)
 433      {
 434          $str = preg_replace(array(
 435  
 436                  // eliminate single line comments in '// ...' form
 437                  '#^\s*//(.+)$#m',
 438  
 439                  // eliminate multi-line comments in '/* ... */' form, at start of string
 440                  '#^\s*/\*(.+)\*/#Us',
 441  
 442                  // eliminate multi-line comments in '/* ... */' form, at end of string
 443                  '#/\*(.+)\*/\s*$#Us'
 444  
 445              ), '', $str);
 446  
 447          // eliminate extraneous space
 448          return trim($str);
 449      }
 450  
 451     /**
 452      * decodes a JSON string into appropriate variable
 453      *
 454      * @param    string  $str    JSON-formatted string
 455      *
 456      * @return   mixed   number, boolean, string, array, or object
 457      *                   corresponding to given JSON input string.
 458      *                   See argument 1 to Services_JSON() above for object-output behavior.
 459      *                   Note that decode() always returns strings
 460      *                   in ASCII or UTF-8 format!
 461      */
 462      public function decode($str)
 463      {
 464          $str = $this->reduce_string($str);
 465  
 466          switch (strtolower($str)) {
 467              case 'true':
 468                  return true;
 469  
 470              case 'false':
 471                  return false;
 472  
 473              case 'null':
 474                  return null;
 475  
 476              default:
 477                  $m = array();
 478  
 479                  if (is_numeric($str)) {
 480                      // Lookie-loo, it's a number
 481  
 482                      // This would work on its own, but I'm trying to be
 483                      // good about returning integers where appropriate:
 484                      // return (float)$str;
 485  
 486                      // Return float or int, as appropriate
 487                      return ((float)$str == (integer)$str)
 488                          ? (integer)$str
 489                          : (float)$str;
 490  
 491                  } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {
 492                      // STRINGS RETURNED IN UTF-8 FORMAT
 493                      $delim = substr($str, 0, 1);
 494                      $chrs = substr($str, 1, -1);
 495                      $utf8 = '';
 496                      $strlen_chrs = strlen($chrs);
 497  
 498                      for ($c = 0; $c < $strlen_chrs; ++$c) {
 499  
 500                          $substr_chrs_c_2 = substr($chrs, $c, 2);
 501                          $ord_chrs_c = ord($chrs{$c});
 502  
 503                          switch (true) {
 504                              case $substr_chrs_c_2 == '\b':
 505                                  $utf8 .= chr(0x08);
 506                                  ++$c;
 507                                  break;
 508                              case $substr_chrs_c_2 == '\t':
 509                                  $utf8 .= chr(0x09);
 510                                  ++$c;
 511                                  break;
 512                              case $substr_chrs_c_2 == '\n':
 513                                  $utf8 .= chr(0x0A);
 514                                  ++$c;
 515                                  break;
 516                              case $substr_chrs_c_2 == '\f':
 517                                  $utf8 .= chr(0x0C);
 518                                  ++$c;
 519                                  break;
 520                              case $substr_chrs_c_2 == '\r':
 521                                  $utf8 .= chr(0x0D);
 522                                  ++$c;
 523                                  break;
 524  
 525                              case $substr_chrs_c_2 == '\\"':
 526                              case $substr_chrs_c_2 == '\\\'':
 527                              case $substr_chrs_c_2 == '\\\\':
 528                              case $substr_chrs_c_2 == '\\/':
 529                                  if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
 530                                     ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
 531                                      $utf8 .= $chrs{++$c};
 532                                  }
 533                                  break;
 534  
 535                              case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):
 536                                  // single, escaped unicode character
 537                                  $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
 538                                         . chr(hexdec(substr($chrs, ($c + 4), 2)));
 539                                  $utf8 .= $this->utf162utf8($utf16);
 540                                  $c += 5;
 541                                  break;
 542  
 543                              case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
 544                                  $utf8 .= $chrs{$c};
 545                                  break;
 546  
 547                              case ($ord_chrs_c & 0xE0) == 0xC0:
 548                                  // characters U-00000080 - U-000007FF, mask 110XXXXX
 549                                  //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 550                                  $utf8 .= substr($chrs, $c, 2);
 551                                  ++$c;
 552                                  break;
 553  
 554                              case ($ord_chrs_c & 0xF0) == 0xE0:
 555                                  // characters U-00000800 - U-0000FFFF, mask 1110XXXX
 556                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 557                                  $utf8 .= substr($chrs, $c, 3);
 558                                  $c += 2;
 559                                  break;
 560  
 561                              case ($ord_chrs_c & 0xF8) == 0xF0:
 562                                  // characters U-00010000 - U-001FFFFF, mask 11110XXX
 563                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 564                                  $utf8 .= substr($chrs, $c, 4);
 565                                  $c += 3;
 566                                  break;
 567  
 568                              case ($ord_chrs_c & 0xFC) == 0xF8:
 569                                  // characters U-00200000 - U-03FFFFFF, mask 111110XX
 570                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 571                                  $utf8 .= substr($chrs, $c, 5);
 572                                  $c += 4;
 573                                  break;
 574  
 575                              case ($ord_chrs_c & 0xFE) == 0xFC:
 576                                  // characters U-04000000 - U-7FFFFFFF, mask 1111110X
 577                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
 578                                  $utf8 .= substr($chrs, $c, 6);
 579                                  $c += 5;
 580                                  break;
 581  
 582                          }
 583  
 584                      }
 585  
 586                      return $utf8;
 587  
 588                  } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
 589                      // array, or object notation
 590  
 591                      if ($str{0} == '[') {
 592                          $stk = array(SERVICES_JSON_IN_ARR);
 593                          $arr = array();
 594                      } else {
 595                          if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
 596                              $stk = array(SERVICES_JSON_IN_OBJ);
 597                              $obj = array();
 598                          } else {
 599                              $stk = array(SERVICES_JSON_IN_OBJ);
 600                              $obj = new \stdClass();
 601                          }
 602                      }
 603  
 604                      array_push($stk, array('what'  => SERVICES_JSON_SLICE,
 605                                             'where' => 0,
 606                                             'delim' => false));
 607  
 608                      $chrs = substr($str, 1, -1);
 609                      $chrs = $this->reduce_string($chrs);
 610  
 611                      if ($chrs == '') {
 612                          if (reset($stk) == SERVICES_JSON_IN_ARR) {
 613                              return $arr;
 614  
 615                          } else {
 616                              return $obj;
 617  
 618                          }
 619                      }
 620  
 621                      //print("\nparsing {$chrs}\n");
 622  
 623                      $strlen_chrs = strlen($chrs);
 624  
 625                      for ($c = 0; $c <= $strlen_chrs; ++$c) {
 626  
 627                          $top = end($stk);
 628                          $substr_chrs_c_2 = substr($chrs, $c, 2);
 629  
 630                          if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {
 631                              // found a comma that is not inside a string, array, etc.,
 632                              // OR we've reached the end of the character list
 633                              $slice = substr($chrs, $top['where'], ($c - $top['where']));
 634                              array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
 635                              //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
 636  
 637                              if (reset($stk) == SERVICES_JSON_IN_ARR) {
 638                                  // we are in an array, so just push an element onto the stack
 639                                  array_push($arr, $this->decode($slice));
 640  
 641                              } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
 642                                  // we are in an object, so figure
 643                                  // out the property name and set an
 644                                  // element in an associative array,
 645                                  // for now
 646                                  $parts = array();
 647                                  
 648                                  if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
 649                                      // "name":value pair
 650                                      $key = $this->decode($parts[1]);
 651                                      $val = $this->decode($parts[2]);
 652  
 653                                      if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
 654                                          $obj[$key] = $val;
 655                                      } else {
 656                                          $obj->$key = $val;
 657                                      }
 658                                  } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
 659                                      // name:value pair, where name is unquoted
 660                                      $key = $parts[1];
 661                                      $val = $this->decode($parts[2]);
 662  
 663                                      if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
 664                                          $obj[$key] = $val;
 665                                      } else {
 666                                          $obj->$key = $val;
 667                                      }
 668                                  }
 669  
 670                              }
 671  
 672                          } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
 673                              // found a quote, and we are not inside a string
 674                              array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
 675                              //print("Found start of string at {$c}\n");
 676  
 677                          } elseif (($chrs{$c} == $top['delim']) &&
 678                                   ($top['what'] == SERVICES_JSON_IN_STR) &&
 679                                   ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) {
 680                              // found a quote, we're in a string, and it's not escaped
 681                              // we know that it's not escaped becase there is _not_ an
 682                              // odd number of backslashes at the end of the string so far
 683                              array_pop($stk);
 684                              //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
 685  
 686                          } elseif (($chrs{$c} == '[') &&
 687                                   in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
 688                              // found a left-bracket, and we are in an array, object, or slice
 689                              array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));
 690                              //print("Found start of array at {$c}\n");
 691  
 692                          } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
 693                              // found a right-bracket, and we're in an array
 694                              array_pop($stk);
 695                              //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
 696  
 697                          } elseif (($chrs{$c} == '{') &&
 698                                   in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
 699                              // found a left-brace, and we are in an array, object, or slice
 700                              array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false));
 701                              //print("Found start of object at {$c}\n");
 702  
 703                          } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
 704                              // found a right-brace, and we're in an object
 705                              array_pop($stk);
 706                              //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
 707  
 708                          } elseif (($substr_chrs_c_2 == '/*') &&
 709                                   in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
 710                              // found a comment start, and we are in an array, object, or slice
 711                              array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false));
 712                              $c++;
 713                              //print("Found start of comment at {$c}\n");
 714  
 715                          } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) {
 716                              // found a comment end, and we're in one now
 717                              array_pop($stk);
 718                              $c++;
 719  
 720                              for ($i = $top['where']; $i <= $c; ++$i)
 721                                  $chrs = substr_replace($chrs, ' ', $i, 1);
 722  
 723                              //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
 724  
 725                          }
 726  
 727                      }
 728  
 729                      if (reset($stk) == SERVICES_JSON_IN_ARR) {
 730                          return $arr;
 731  
 732                      } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
 733                          return $obj;
 734  
 735                      }
 736  
 737                  }
 738          }
 739      }
 740  }    
 741  ?>


Generated: Thu Jun 4 19:17:11 2015 Cross-referenced by PHPXref 0.7.1