topical media & game development

topical media & game development

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basic-ajax-11-JSON.php / php


  <?php
  /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

Converts to and from JSON format. JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. This feature can also be found in Python. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, TCL, and many others. These properties make JSON an ideal data-interchange language. This package provides a simple encoder and decoder for JSON notation. It is intended for use with client-side Javascript applications that make use of HTTPRequest to perform server communication functions - data can be encoded into JSON notation for use in a client-side javascript, or decoded from incoming Javascript requests. JSON format is native to Javascript, and can be directly eval()'ed with no further parsing overhead All strings should be in ASCII or UTF-8 format! LICENSE: Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. @category @package Services_JSON
author: Michal Migurski
author: Matt Knapp
author: Brett Stimmerman @copyright 2005 Michal Migurski
version: CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp$ @license http://www.opensource.org/licenses/bsd-license.php * gray http://pear.php.net/pepr/pepr-proposal-show.php?id=198 */ /** * Marker constant for Services_JSON::decode(), used to flag stack state


  
  define('SERVICES_JSON_SLICE',   1);

Marker constant for Services_JSON::decode(), used to flag stack state


  
  define('SERVICES_JSON_IN_STR',  2);

Marker constant for Services_JSON::decode(), used to flag stack state


  
  define('SERVICES_JSON_IN_ARR',  3);

Marker constant for Services_JSON::decode(), used to flag stack state


  
  define('SERVICES_JSON_IN_OBJ',  4);

Marker constant for Services_JSON::decode(), used to flag stack state


  
  define('SERVICES_JSON_IN_CMT', 5);

Behavior switch for Services_JSON::decode()


  
  define('SERVICES_JSON_LOOSE_TYPE', 16);

Behavior switch for Services_JSON::decode()


  
  define('SERVICES_JSON_SUPPRESS_ERRORS', 32);

Converts to and from JSON format. Brief example of use: <code> // create a new instance of Services_JSON $json = new Services_JSON();

// convert a complexe value to JSON notation, and send it to the browser$ value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4))); $output =$ json->encode( $value);

print($ output); // prints: ["foo","bar",[1,2,"baz"],[3,[4]]] // accept incoming POST data, assumed to be in JSON notation $input = file_get_contents('php://input', 1000000);$ value = $json->decode($ input); </code>


  
  class Services_JSON
  {

constructs a new JSON instance
parameter: int $use object behavior flags; combine with boolean-OR

possible values:
- SERVICES_JSON_LOOSE_TYPE: loose typing.
"{...}" syntax creates associative arrays
instead of objects in decode().
- SERVICES_JSON_SUPPRESS_ERRORS: error suppression.
Values which can't be encoded (e.g. resources)
appear as NULL instead of throwing errors.
By default, a deeply-nested resource will
bubble up with an error, so all return values
from encode() should be checked with isError()$


  
      function Services_JSON(use = 0)
      {
           $this->use =$ use;
      }

convert a string from one UTF-16 char to one UTF-8 char Normally should be handled by mb_convert_encoding, but provides a slower PHP-only method for installations that lack the multibye string extension.
parameter: string $utf16 UTF-16 character$ returns: string UTF-8 character @access private


  
      function utf162utf8(utf16)
      {
          // oh please oh please oh please oh please oh please
          if(function_exists('mb_convert_encoding')) {
              return mb_convert_encoding( $utf16, 'UTF-8', 'UTF-16');
          }$ bytes = (ord( $utf16{0}) << 8) | ord($ utf16{1});
  
          switch(true) {
              case ((0x7F &  $bytes) ==$ bytes):
                  // this case should never be reached, because we are in ASCII range
                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                  return chr(0x7F &  $bytes);
  
              case (0x07FF &$ bytes) ==  $bytes:
                  // return a 2-byte UTF-8 character
                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 return chr(0xC0 | (($ bytes >> 6) & 0x1F))
                       . chr(0x80 | ( $bytes & 0x3F));
  
              case (0xFFFF &$ bytes) ==  $bytes:
                  // return a 3-byte UTF-8 character
                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 return chr(0xE0 | (($ bytes >> 12) & 0x0F))
                       . chr(0x80 | (( $bytes >> 6) & 0x3F))
                       . chr(0x80 | ($ bytes & 0x3F));
          }
  
          // ignoring UTF-32 for now, sorry
          return '';
      }

convert a string from one UTF-8 char to one UTF-16 char Normally should be handled by mb_convert_encoding, but provides a slower PHP-only method for installations that lack the multibye string extension.
parameter: string $utf8 UTF-8 character$ returns: string UTF-16 character @access private


  
      function utf82utf16(utf8)
      {
          // oh please oh please oh please oh please oh please
          if(function_exists('mb_convert_encoding')) {
              return mb_convert_encoding( $utf8, 'UTF-16', 'UTF-8');
          }
  
          switch(strlen($ utf8)) {
              case 1:
                  // this case should never be reached, because we are in ASCII range
                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                  return  $utf8;
  
              case 2:
                  // return a UTF-16 character from a 2-byte UTF-8 char
                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 return chr(0x07 & (ord($ utf8{0}) >> 2))
                       . chr((0xC0 & (ord( $utf8{0}) << 6))
                           | (0x3F & ord($ utf8{1})));
  
              case 3:
                  // return a UTF-16 character from a 3-byte UTF-8 char
                  // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                  return chr((0xF0 & (ord( $utf8{0}) << 4))
                           | (0x0F & (ord($ utf8{1}) >> 2)))
                       . chr((0xC0 & (ord( $utf8{1}) << 6))
                           | (0x7F & ord($ utf8{2})));
          }
  
          // ignoring UTF-32 for now, sorry
          return '';
      }

encodes an arbitrary variable into JSON format
parameter: mixed $var any number, boolean, string, array, or object to be encoded.

see argument 1 to Services_JSON() above for array-parsing behavior.
if var is a strng, note that encode() always expects it
to be in ASCII or UTF-8 format!$ returns: mixed JSON string representation of input var or an error if a problem occurs @access public


  
      function encode(var)
      {
          switch (gettype( $var)) {
              case 'boolean':
                  return$ var ? 'true' : 'false';
  
              case 'NULL':
                  return 'null';
  
              case 'integer':
                  return (int)  $var;
  
              case 'double':
              case 'float':
                  return (float)$ var;
  
              case 'string':
                  // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
                   $ascii = '';$ strlen_var = strlen( $var);$ /*
                  * Iterate over every character in the string,
                  * escaping with a slash or encoding to UTF-8 where necessary
                  */
                  for (c = 0;  $c <$ strlen_var; ++ $c) {$ ord_var_c = ord( $var{$ c});
  
                      switch (true) {
                          case  $ord_var_c == 0x08:$ ascii .= '\b';
                              break;
                          case  $ord_var_c == 0x09:$ ascii .= '\t';
                              break;
                          case  $ord_var_c == 0x0A:$ ascii .= '\n';
                              break;
                          case  $ord_var_c == 0x0C:$ ascii .= '\f';
                              break;
                          case  $ord_var_c == 0x0D:$ ascii .= '\r';
                              break;
  
                          case  $ord_var_c == 0x22:
                          case$ ord_var_c == 0x2F:
                          case  $ord_var_c == 0x5C:$ // double quote, slash, slosh
                              ascii .= '\\'. $var{$ c};
                              break;
  
                          case (( $ord_var_c >= 0x20) && ($ ord_var_c <= 0x7F)):
                              // characters U-00000000 - U-0000007F (same as ASCII)
                               $ascii .=$ var{ $c$ };
                              break;
  
                          case ((ord_var_c & 0xE0) == 0xC0):
                              // characters U-00000080 - U-000007FF, mask 110XXXXX
                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                               $char = pack('C*',$ ord_var_c, ord( $var{$ c + 1}));
                               $c += 1;$ utf16 =  $this->utf82utf16($ char);
                               $ascii .= sprintf('\u%04s', bin2hex($ utf16));
                              break;
  
                          case (( $ord_var_c & 0xF0) == 0xE0):
                              // characters U-00000800 - U-0000FFFF, mask 1110XXXX
                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8$ char = pack('C*',  $ord_var_c,
                                           ord($ var{ $c + 1}),
                                           ord($ var{ $c + 2}));$ c += 2;
                               $utf16 =$ this->utf82utf16( $char);$ ascii .= sprintf('\u%04s', bin2hex( $utf16));
                              break;
  
                          case (($ ord_var_c & 0xF8) == 0xF0):
                              // characters U-00010000 - U-001FFFFF, mask 11110XXX
                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                               $char = pack('C*',$ ord_var_c,
                                           ord( $var{$ c + 1}),
                                           ord( $var{$ c + 2}),
                                           ord( $var{$ c + 3}));
                               $c += 3;$ utf16 =  $this->utf82utf16($ char);
                               $ascii .= sprintf('\u%04s', bin2hex($ utf16));
                              break;
  
                          case (( $ord_var_c & 0xFC) == 0xF8):
                              // characters U-00200000 - U-03FFFFFF, mask 111110XX
                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8$ char = pack('C*',  $ord_var_c,
                                           ord($ var{ $c + 1}),
                                           ord($ var{ $c + 2}),
                                           ord($ var{ $c + 3}),
                                           ord($ var{ $c + 4}));$ c += 4;
                               $utf16 =$ this->utf82utf16( $char);$ ascii .= sprintf('\u%04s', bin2hex( $utf16));
                              break;
  
                          case (($ ord_var_c & 0xFE) == 0xFC):
                              // characters U-04000000 - U-7FFFFFFF, mask 1111110X
                              // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                               $char = pack('C*',$ ord_var_c,
                                           ord( $var{$ c + 1}),
                                           ord( $var{$ c + 2}),
                                           ord( $var{$ c + 3}),
                                           ord( $var{$ c + 4}),
                                           ord( $var{$ c + 5}));
                               $c += 5;$ utf16 =  $this->utf82utf16($ char);
                               $ascii .= sprintf('\u%04s', bin2hex($ utf16));
                              break;
                      }
                  }
  
                  return '"'. $ascii.'"';
  
              case 'array':$ /*
                  * As per JSON spec if any array key is not an integer
                  * we must treat the the whole array as an object. We
                  * also try to catch a sparsely populated associative
                  * array with numeric keys here because some JS engines
                  * will create an array with empty indexes up to
                  * max_index which can cause memory issues and because
                  * the keys, which may be relevant, will be remapped
                  * otherwise.
                  *
                  * As per the ECMA and JSON specification an object may
                  * have any string as a property. Unfortunately due to
                  * a hole in the ECMA specification if the key is a
                  * ECMA reserved word or starts with a digit the
                  * parameter is only accessible using ECMAScript's
                  * bracket notation.
                  */
  
                  // treat as a JSON object
                  if (is_array(var) && count( $var) && (array_keys($ var) !== range(0, sizeof( $var) - 1))) {$ properties = array_map(array( $this, 'name_value'),
                                              array_keys($ var),
                                              array_values( $var));
  
                      foreach($ properties as  $property) {
                          if(Services_JSON::isError($ property)) {
                              return  $property;
                          }
                      }
  
                      return '{' . join(',',$ properties) . '}';
                  }
  
                  // treat it like a regular array
                   $elements = array_map(array($ this, 'encode'),  $var);
  
                  foreach($ elements as  $element) {
                      if(Services_JSON::isError($ element)) {
                          return  $element;
                      }
                  }
  
                  return '[' . join(',',$ elements) . ']';
  
              case 'object':
                   $vars = get_object_vars($ var);
  
                   $properties = array_map(array($ this, 'name_value'),
                                          array_keys( $vars),
                                          array_values($ vars));
  
                  foreach( $properties as$ property) {
                      if(Services_JSON::isError( $property)) {
                          return$ property;
                      }
                  }
  
                  return '{' . join(',',  $properties) . '}';
  
              default:
                  return ($ this->use & SERVICES_JSON_SUPPRESS_ERRORS)
                      ? 'null'
                      : new Services_JSON_Error(gettype( $var)." can not be encoded as JSON string");
          }
      }$

array-walking function for use in generating JSON-formatted name-value pairs parameter: string name name of key to use
parameter: mixed $value reference to an array element to be encoded$ returns: string JSON-formatted name-value pair, like '"name":value' @access private


  
      function name_value(name,  $value)
      {$ encoded_value =  $this->encode($ value);
  
          if(Services_JSON::isError( $encoded_value)) {
              return$ encoded_value;
          }
  
          return  $this->encode(strval($ name)) . ':' .  $encoded_value;
      }$

reduce a string by removing leading and trailing comments and whitespace parameter: str string string value to strip of comments and whitespace
returns: string string value stripped of comments and whitespace @access private


  
      function reduce_string( $str)
      {$ str = preg_replace(array(
  
                  // eliminate single line comments in '// ...' form
                  '#^\s*//(.+) $#m',$ // eliminate multi-line comments in '/* ... */' form, at start of string
                  '#^\s*/\*(.+)\*/#Us',
  
                  // eliminate multi-line comments in '/* ... */' form, at end of string
                  '#/\*(.+)\*/\s*#Us'
  
              ), '',  $str);$ // eliminate extraneous space
          return trim(str);
      }

decodes a JSON string into appropriate variable
parameter: string $str JSON-formatted string$ returns: mixed number, boolean, string, array, or object corresponding to given JSON input string. See argument 1 to Services_JSON() above for object-output behavior. Note that decode() always returns strings in ASCII or UTF-8 format! @access public


  
      function decode(str)
      {
           $str =$ this->reduce_string( $str);
  
          switch (strtolower($ str)) {
              case 'true':
                  return true;
  
              case 'false':
                  return false;
  
              case 'null':
                  return null;
  
              default:
                   $m = array();
  
                  if (is_numeric($ str)) {
                      // Lookie-loo, it's a number
  
                      // This would work on its own, but I'm trying to be
                      // good about returning integers where appropriate:
                      // return (float) $str;
  
                      // Return float or int, as appropriate
                      return ((float)$ str == (integer) $str)
                          ? (integer)$ str
                          : (float) $str;
  
                  } elseif (preg_match('/^("|\').*(\1)$ /s',  $str,$ m) &&  $m[1] ==$ m[2]) {
                      // STRINGS RETURNED IN UTF-8 FORMAT
                       $delim = substr($ str, 0, 1);
                       $chrs = substr($ str, 1, -1);
                       $utf8 = '';$ strlen_chrs = strlen( $chrs);
  
                      for ($ c = 0;  $c <$ strlen_chrs; ++ $c) {$ substr_chrs_c_2 = substr( $chrs,$ c, 2);
                           $ord_chrs_c = ord($ chrs{ $c});
  
                          switch (true) {
                              case$ substr_chrs_c_2 == '\b':
                                   $utf8 .= chr(0x08);
                                  ++$ c;
                                  break;
                              case  $substr_chrs_c_2 == '\t':$ utf8 .= chr(0x09);
                                  ++ $c;
                                  break;
                              case$ substr_chrs_c_2 == '\n':
                                   $utf8 .= chr(0x0A);
                                  ++$ c;
                                  break;
                              case  $substr_chrs_c_2 == '\f':$ utf8 .= chr(0x0C);
                                  ++ $c;
                                  break;
                              case$ substr_chrs_c_2 == '\r':
                                   $utf8 .= chr(0x0D);
                                  ++$ c;
                                  break;
  
                              case  $substr_chrs_c_2 == '\\"':
                              case$ substr_chrs_c_2 == '\\\'':
                              case  $substr_chrs_c_2 == '\\\\':
                              case$ substr_chrs_c_2 == '\\/':
                                  if (( $delim == '"' &&$ substr_chrs_c_2 != '\\\'') ||
                                     ( $delim == "'" &&$ substr_chrs_c_2 != '\\"')) {
                                       $utf8 .=$ chrs{++ $c$ };
                                  }
                                  break;
  
                              case preg_match('/\\\u[0-9A-F]{4}/i', substr(chrs,  $c, 6)):
                                  // single, escaped unicode character$ utf16 = chr(hexdec(substr( $chrs, ($ c + 2), 2)))
                                         . chr(hexdec(substr( $chrs, ($ c + 4), 2)));
                                   $utf8 .=$ this->utf162utf8( $utf16);$ c += 5;
                                  break;
  
                              case ( $ord_chrs_c >= 0x20) && ($ ord_chrs_c <= 0x7F):
                                   $utf8 .=$ chrs{ $c$ };
                                  break;
  
                              case (ord_chrs_c & 0xE0) == 0xC0:
                                  // characters U-00000080 - U-000007FF, mask 110XXXXX
                                  //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                   $utf8 .= substr($ chrs,  $c, 2);
                                  ++$ c;
                                  break;
  
                              case ( $ord_chrs_c & 0xF0) == 0xE0:
                                  // characters U-00000800 - U-0000FFFF, mask 1110XXXX
                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8$ utf8 .= substr( $chrs,$ c, 3);
                                   $c += 2;
                                  break;
  
                              case ($ ord_chrs_c & 0xF8) == 0xF0:
                                  // characters U-00010000 - U-001FFFFF, mask 11110XXX
                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                   $utf8 .= substr($ chrs,  $c, 4);$ c += 3;
                                  break;
  
                              case ( $ord_chrs_c & 0xFC) == 0xF8:
                                  // characters U-00200000 - U-03FFFFFF, mask 111110XX
                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8$ utf8 .= substr( $chrs,$ c, 5);
                                   $c += 4;
                                  break;
  
                              case ($ ord_chrs_c & 0xFE) == 0xFC:
                                  // characters U-04000000 - U-7FFFFFFF, mask 1111110X
                                  // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                                   $utf8 .= substr($ chrs,  $c, 6);$ c += 5;
                                  break;
  
                          }
  
                      }
  
                      return  $utf8;
  
                  } elseif (preg_match('/^\[.*\]$ /s',  $str) || preg_match('/^{.*}$ /s',  $str)) {
                      // array, or object notation
  
                      if ($ str{0} == '[') {
                           $stk = array(SERVICES_JSON_IN_ARR);$ arr = array();
                      } else {
                          if ( $this->use & SERVICES_JSON_LOOSE_TYPE) {$ stk = array(SERVICES_JSON_IN_OBJ);
                               $obj = array();
                          } else {$ stk = array(SERVICES_JSON_IN_OBJ);
                               $obj = new stdClass();
                          }
                      }
  
                      array_push($ stk, array('what'  => SERVICES_JSON_SLICE,
                                             'where' => 0,
                                             'delim' => false));
  
                       $chrs = substr($ str, 1, -1);
                       $chrs =$ this->reduce_string( $chrs);
  
                      if ($ chrs == '') {
                          if (reset( $stk) == SERVICES_JSON_IN_ARR) {
                              return$ arr;
  
                          } else {
                              return  $obj;
  
                          }
                      }
  
                      //print("\nparsing {$ chrs}\n");
  
                       $strlen_chrs = strlen($ chrs);
  
                      for ( $c = 0;$ c <=  $strlen_chrs; ++$ c) {
  
                           $top = end($ stk);
                           $substr_chrs_c_2 = substr($ chrs,  $c, 2);
  
                          if (($ c ==  $strlen_chrs) || (($ chrs{ $c} == ',') && ($ top['what'] == SERVICES_JSON_SLICE))) {
                              // found a comma that is not inside a string, array, etc.,
                              // OR we've reached the end of the character list
                               $slice = substr($ chrs,  $top['where'], ($ c -  $top['where']));
                              array_push($ stk, array('what' => SERVICES_JSON_SLICE, 'where' => ( $c + 1), 'delim' => false));
                              //print("Found split at {$ c}: ".substr( $chrs,$ top['where'], (1 +  $c -$ top['where']))."\n");
  
                              if (reset( $stk) == SERVICES_JSON_IN_ARR) {
                                  // we are in an array, so just push an element onto the stack
                                  array_push($ arr,  $this->decode($ slice));
  
                              } elseif (reset( $stk) == SERVICES_JSON_IN_OBJ) {
                                  // we are in an object, so figure
                                  // out the property name and set an
                                  // element in an associative array,
                                  // for now$ parts = array();
                                  
                                  if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),? $/Uis',$ slice,  $parts)) {
                                      // "name":value pair$ key =  $this->decode($ parts[1]);
                                       $val =$ this->decode( $parts[2]);
  
                                      if ($ this->use & SERVICES_JSON_LOOSE_TYPE) {
                                           $obj[$ key] =  $val;
                                      } else {$ obj-> $key =$ val;
                                      }
                                  } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),? $/Uis',$ slice,  $parts)) {
                                      // name:value pair, where name is unquoted$ key =  $parts[1];$ val =  $this->decode($ parts[2]);
  
                                      if ( $this->use & SERVICES_JSON_LOOSE_TYPE) {$ obj[ $key] =$ val;
                                      } else {
                                           $obj->$ key =  $val;
                                      }
                                  }
  
                              }
  
                          } elseif ((($ chrs{ $c} == '"') || ($ chrs{ $c} == "'")) && ($ top['what'] != SERVICES_JSON_IN_STR)) {
                              // found a quote, and we are not inside a string
                              array_push( $stk, array('what' => SERVICES_JSON_IN_STR, 'where' =>$ c, 'delim' =>  $chrs{$ c}));
                              //print("Found start of string at { $c}\n");
  
                          } elseif (($ chrs{ $c} ==$ top['delim']) &&
                                   ( $top['what'] == SERVICES_JSON_IN_STR) &&
                                   ((strlen(substr($ chrs, 0,  $c)) - strlen(rtrim(substr($ chrs, 0,  $c), '\\'))) % 2 != 1)) {
                              // found a quote, we're in a string, and it's not escaped
                              // we know that it's not escaped becase there is _not_ an
                              // odd number of backslashes at the end of the string so far
                              array_pop($ stk);
                              //print("Found end of string at { $c}: ".substr($ chrs,  $top['where'], (1 + 1 +$ c -  $top['where']))."\n");
  
                          } elseif (($ chrs{ $c} == '[') &&
                                   in_array($ top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
                              // found a left-bracket, and we are in an array, object, or slice
                              array_push( $stk, array('what' => SERVICES_JSON_IN_ARR, 'where' =>$ c, 'delim' => false));
                              //print("Found start of array at { $c}\n");
  
                          } elseif (($ chrs{ $c} == ']') && ($ top['what'] == SERVICES_JSON_IN_ARR)) {
                              // found a right-bracket, and we're in an array
                              array_pop( $stk);
                              //print("Found end of array at {$ c}: ".substr( $chrs,$ top['where'], (1 +  $c -$ top['where']))."\n");
  
                          } elseif (( $chrs{$ c} == '{') &&
                                   in_array( $top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
                              // found a left-brace, and we are in an array, object, or slice
                              array_push($ stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' =>  $c, 'delim' => false));
                              //print("Found start of object at {$ c}\n");
  
                          } elseif (( $chrs{$ c} == '}') && ( $top['what'] == SERVICES_JSON_IN_OBJ)) {
                              // found a right-brace, and we're in an object
                              array_pop($ stk);
                              //print("Found end of object at { $c}: ".substr($ chrs,  $top['where'], (1 +$ c -  $top['where']))."\n");
  
                          } elseif (($ substr_chrs_c_2 == '/*') &&
                                   in_array( $top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
                              // found a comment start, and we are in an array, object, or slice
                              array_push($ stk, array('what' => SERVICES_JSON_IN_CMT, 'where' =>  $c, 'delim' => false));$ c++;
                              //print("Found start of comment at { $c}\n");
  
                          } elseif (($ substr_chrs_c_2 == '*/') && ( $top['what'] == SERVICES_JSON_IN_CMT)) {$ // found a comment end, and we're in one now
                              array_pop(stk);
                               $c++;
  
                              for ($ i =  $top['where'];$ i <=  $c; ++$ i)
                                   $chrs = substr_replace($ chrs, ' ',  $i, 1);
  
                              //print("Found end of comment at {$ c}: ".substr( $chrs,$ top['where'], (1 +  $c -$ top['where']))."\n");
  
                          }
  
                      }
  
                      if (reset( $stk) == SERVICES_JSON_IN_ARR) {
                          return$ arr;
  
                      } elseif (reset( $stk) == SERVICES_JSON_IN_OBJ) {
                          return$ obj;
  
                      }
  
                  }
          }
      }

@todo Ultimately, this should just call PEAR::isError()


  
      function isError( $data,$ code = null)
      {
          if (class_exists('pear')) {
              return PEAR::isError( $data,$ code);
          } elseif (is_object( $data) && (get_class($ data) == 'services_json_error' ||
                                   is_subclass_of( $data, 'services_json_error'))) {
              return true;
          }
  
          return false;
      }
  }
  
  if (class_exists('PEAR_Error')) {
  
      class Services_JSON_Error extends PEAR_Error
      {
          function Services_JSON_Error($ message = 'unknown error',  $code = null,$ mode = null,  $options = null,$ userinfo = null)
          {
              parent::PEAR_Error( $message,$ code,  $mode,$ options,  $userinfo);
          }
      }
  
  } else {$

@todo Ultimately, this class shall be descended from PEAR_Error


  
      class Services_JSON_Error
      {
          function Services_JSON_Error(message = 'unknown error',  $code = null,$ mode = null,  $options = null,$ userinfo = null)
          {
  
          }
      }
  
  }
      
  ?>

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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