<?php /** * 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! * * PHP versions 4 and 5 * * 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. * * @package System.Web.Javascripts * @author Michal Migurski <mike-json@teczno.com> * @author Matt Knapp <mdknapp[at]gmail[dot]com> * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> * @copyright 2005 Michal Migurski * @license http://www.opensource.org/licenses/bsd-license.php * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 */ /** * Converts to and from JSON format. * * @package System.Web.Javascripts * @author Michal Migurski <mike-json@teczno.com> * @author Matt Knapp <mdknapp[at]gmail[dot]com> * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> * @copyright 2005 Michal Migurski * @license http://www.php.net/license/3_0.txt PHP License 3.0 */ class TJSON { /** * Marker constant for JSON::decode(), used to flag stack state */ const JSON_SLICE = 1; /** * Marker constant for JSON::decode(), used to flag stack state */ const JSON_IN_STR = 2; /** * Marker constant for JSON::decode(), used to flag stack state */ const JSON_IN_ARR = 4; /** * Marker constant for JSON::decode(), used to flag stack state */ const JSON_IN_OBJ = 8; /** * Marker constant for JSON::decode(), used to flag stack state */ const JSON_IN_CMT = 16; /** * Behavior switch for JSON::decode() */ const JSON_LOOSE_TYPE = 10; /** * Behavior switch for JSON::decode() */ const JSON_STRICT_TYPE = 11; /** * constructs a new JSON instance * * @param int $use object behavior: when encoding or decoding, * be loose or strict about object/array usage * * possible values: * self::JSON_STRICT_TYPE - strict typing, default * "{...}" syntax creates objects in decode. * self::JSON_LOOSE_TYPE - loose typing * "{...}" syntax creates associative arrays in decode. */ public function __construct($use=self::JSON_STRICT_TYPE) { $this->use = $use; } /** * encodes an arbitrary variable into JSON format * * @param mixed $var any number, boolean, string, array, or object to be encoded. * see argument 1 to JSON() above for array-parsing behavior. * if var is a strng, note that encode() always expects it * to be in ASCII or UTF-8 format! * * @return string JSON string representation of input var * @access public */ public function encode($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 = $this->utf8_to_utf16be($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 = $this->utf8_to_utf16be($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 = $this->utf8_to_utf16be($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 = $this->utf8_to_utf16be($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 = $this->utf8_to_utf16be($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($var) - 1))) { return '{' . join(',', array_map(array($this, 'name_value'), array_keys($var), array_values($var))) . '}'; } // treat it like a regular array return '[' . join(',', array_map(array($this, 'encode'), $var)) . ']'; case 'object': $vars = get_object_vars($var); return '{' . join(',', array_map(array($this, 'name_value'), array_keys($vars), array_values($vars))) . '}'; default: return ''; } } /** * encodes an arbitrary variable into JSON format, alias for encode() * @see JSON::encode() * * @param mixed $var any number, boolean, string, array, or object to be encoded. * see argument 1 to JSON() above for array-parsing behavior. * if var is a strng, note that encode() always expects it * to be in ASCII or UTF-8 format! * * @return string JSON string representation of input var * @access public */ public function enc($var) { return $this->encode($var); } /** function name_value * array-walking function for use in generating JSON-formatted name-value pairs * * @param string $name name of key to use * @param mixed $value reference to an array element to be encoded * * @return string JSON-formatted name-value pair, like '"name":value' * @access private */ protected function name_value($name, $value) { return $this->encode(strval($name)) . ':' . $this->encode($value); } /** * reduce a string by removing leading and trailing comments and whitespace * * @param $str string string value to strip of comments and whitespace * * @return string string value stripped of comments and whitespace * @access private */ protected function reduce_string($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 * * @param string $str JSON-formatted string * * @return mixed number, boolean, string, array, or object * corresponding to given JSON input string. * See argument 1 to JSON() above for object-output behavior. * Note that decode() always returns strings * in ASCII or UTF-8 format! * @access public */ public function decode($str) { $str = $this->reduce_string($str); switch (strtolower($str)) { case 'true': return true; case 'false': return false; case 'null': return null; default: if (is_numeric($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 .= $this->utf16be_to_utf8($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(self::JSON_IN_ARR); $arr = array(); } else { if ($this->use == self::JSON_LOOSE_TYPE) { $stk = array(self::JSON_IN_OBJ); $obj = array(); } else { $stk = array(self::JSON_IN_OBJ); $obj = new stdClass(); } } array_push($stk, array('what' => self::JSON_SLICE, 'where' => 0, 'delim' => false)); $chrs = substr($str, 1, -1); $chrs = $this->reduce_string($chrs); if ($chrs == '') { if (reset($stk) == self::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'] == self::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' => self::JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); if (reset($stk) == self::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) == self::JSON_IN_OBJ) { // we are in an object, so figure // out the property name and set an // element in an associative array, // for now 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 == self::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 == self::JSON_LOOSE_TYPE) { $obj[$key] = $val; } else { $obj->$key = $val; } } } } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != self::JSON_IN_STR)) { // found a quote, and we are not inside a string array_push($stk, array('what' => self::JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c})); //print("Found start of string at {$c}\n"); } elseif (($chrs{$c} == $top['delim']) && ($top['what'] == self::JSON_IN_STR) && (($chrs{$c - 1} != "\\") || ($chrs{$c - 1} == "\\" && $chrs{$c - 2} == "\\"))) { // found a quote, we're in a string, and it's not escaped 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(self::JSON_SLICE, self::JSON_IN_ARR, self::JSON_IN_OBJ))) { // found a left-bracket, and we are in an array, object, or slice array_push($stk, array('what' => self::JSON_IN_ARR, 'where' => $c, 'delim' => false)); //print("Found start of array at {$c}\n"); } elseif (($chrs{$c} == ']') && ($top['what'] == self::JSON_IN_ARR)) { // found a right-bracket, and we're in an array array_pop($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(self::JSON_SLICE, self::JSON_IN_ARR, self::JSON_IN_OBJ))) { // found a left-brace, and we are in an array, object, or slice array_push($stk, array('what' => self::JSON_IN_OBJ, 'where' => $c, 'delim' => false)); //print("Found start of object at {$c}\n"); } elseif (($chrs{$c} == '}') && ($top['what'] == self::JSON_IN_OBJ)) { // found a right-brace, and we're in an object array_pop($stk); //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); } elseif (($substr_chrs_c_2 == '/*') && in_array($top['what'], array(self::JSON_SLICE, self::JSON_IN_ARR, self::JSON_IN_OBJ))) { // found a comment start, and we are in an array, object, or slice array_push($stk, array('what' => self::JSON_IN_CMT, 'where' => $c, 'delim' => false)); $c++; //print("Found start of comment at {$c}\n"); } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == self::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) == self::JSON_IN_ARR) { return $arr; } elseif (reset($stk) == self::JSON_IN_OBJ) { return $obj; } } } } /** * decodes a JSON string into appropriate variable; alias for decode() * @see JSON::decode() * * @param string $str JSON-formatted string * * @return mixed number, boolean, string, array, or object * corresponding to given JSON input string. * See argument 1 to JSON() above for object-output behavior. * Note that decode() always returns strings * in ASCII or UTF-8 format! */ public function dec($var) { return $this->decode($var); } /** * This function returns any UTF-8 encoded text as a list of * Unicode values: * * @author Scott Michael Reynen <scott@randomchaos.com> * @link http://www.randomchaos.com/document.php?source=php_and_unicode * @see unicode_to_utf8() */ protected function utf8_to_unicode( &$str ) { $unicode = array(); $values = array(); $lookingFor = 1; for ($i = 0; $i < strlen( $str ); $i++ ) { $thisValue = ord( $str[ $i ] ); if ( $thisValue < 128 ) $unicode[] = $thisValue; else { if ( count( $values ) == 0 ) $lookingFor = ( $thisValue < 224 ) ? 2 : 3; $values[] = $thisValue; if ( count( $values ) == $lookingFor ) { $number = ( $lookingFor == 3 ) ? ( ( $values[0] % 16 ) * 4096 ) + ( ( $values[1] % 64 ) * 64 ) + ( $values[2] % 64 ): ( ( $values[0] % 32 ) * 64 ) + ( $values[1] % 64 ); $unicode[] = $number; $values = array(); $lookingFor = 1; } } } return $unicode; } /** * This function converts a Unicode array back to its UTF-8 representation * * @author Scott Michael Reynen <scott@randomchaos.com> * @link http://www.randomchaos.com/document.php?source=php_and_unicode * @see utf8_to_unicode() */ protected function unicode_to_utf8( &$str ) { $utf8 = ''; foreach( $str as $unicode ) { if ( $unicode < 128 ) { $utf8.= chr( $unicode ); } elseif ( $unicode < 2048 ) { $utf8.= chr( 192 + ( ( $unicode - ( $unicode % 64 ) ) / 64 ) ); $utf8.= chr( 128 + ( $unicode % 64 ) ); } else { $utf8.= chr( 224 + ( ( $unicode - ( $unicode % 4096 ) ) / 4096 ) ); $utf8.= chr( 128 + ( ( ( $unicode % 4096 ) - ( $unicode % 64 ) ) / 64 ) ); $utf8.= chr( 128 + ( $unicode % 64 ) ); } } return $utf8; } /** * UTF-8 to UTF-16BE conversion. * * Maybe really UCS-2 without mb_string due to utf8_to_unicode limits */ protected function utf8_to_utf16be(&$str, $bom = false) { $out = $bom ? "\xFE\xFF" : ''; if(function_exists('mb_convert_encoding')) return $out.mb_convert_encoding($str,'UTF-16BE','UTF-8'); $uni = $this->utf8_to_unicode($str); foreach($uni as $cp) $out .= pack('n',$cp); return $out; } /** * UTF-8 to UTF-16BE conversion. * * Maybe really UCS-2 without mb_string due to utf8_to_unicode limits */ protected function utf16be_to_utf8(&$str) { $uni = unpack('n*',$str); return unicode_to_utf8($uni); } } ?>