4

据我了解,JSON_BIGINT_AS_STRING只有5.4+。我需要在 5.1+ 环境中重现相同的行为。该代码旨在分发,我无法控制它将运行的环境。我有哪些选择(除了编写自己的 json 解析器)?是否有任何成熟且经过良好测试的解决方案?

4

3 回答 3

6

这是一个相当棘手的问题,但这里是Service_JSON的修改版本,已经使用了一段时间,它成功了;

大多数regex解决方案都无法通过此测试

$json = "[999999999999999999]"; 
var_dump(json_decode(preg_replace('/("\w+"):(\d+)/', '\\1:"\\2"', $json)));

输出

array (size=1)
    0 => float 1.0E+18

使用服务 json

$json = new ServicesJSON();
$var = $json->decode("[999999999999999999]");
var_dump($var);

输出

array (size=1)
    0 => string '999999999999999999' (length=18)

更复杂的 Json

$data = '{
    "glossary": {
        "title": "example glossary",
        "num1":"343434343434343434343",
        "num2":1112222333344455566,
        "num3":[223232331321323,"23232343545454",3434343434334],
        "GlossDiv": {
            "title": "S",
            "GlossList": {
                "GlossEntry": {
                    "ID": "SGML",
                    "SortAs": "SGML",
                    "GlossTerm": "Standard Generalized Markup Language",
                    "Acronym": "SGML",
                    "Abbrev": "ISO 8879:1986",
                    "GlossDef": {
                        "para": "A meta-markup language, used to create markup languages such as DocBook.",
                        "GlossSeeAlso": ["GML", "XML"],
                        "num1":"343434343434343434343",
                        "num2":1112222333344455566,
                        "num3":[223232331321323,"23232343545454",3434343434334]
                    },
                    "GlossSee": "markup",
                    "num1":"343434343434343434343",
                    "num2":1112222333344455566,
                    "num3":[223232331321323,"23232343545454",3434343434334],
                    "num4":[999999999999999999]
                }
            }
        }
    }
}';


var_dump($json->decode($data,128));

输出

object(stdClass)[2]
  public 'glossary' => 
    object(stdClass)[3]
      public 'title' => string 'example glossary' (length=16)
      public 'num1' => string '343434343434343434343' (length=21)
      public 'num2' => string '1112222333344455566' (length=19)
      public 'num3' => 
        array (size=3)
          0 => string '223232331321323' (length=15)
          1 => string '23232343545454' (length=14)
          2 => string '3434343434334' (length=13)
      public 'GlossDiv' => 
        object(stdClass)[4]
          public 'title' => string 'S' (length=1)
          public 'GlossList' => 
            object(stdClass)[5]
              public 'GlossEntry' => 
                object(stdClass)[6]
                  public 'ID' => string 'SGML' (length=4)
                  public 'SortAs' => string 'SGML' (length=4)
                  public 'GlossTerm' => string 'Standard Generalized Markup Language' (length=36)
                  public 'Acronym' => string 'SGML' (length=4)
                  public 'Abbrev' => string 'ISO 8879:1986' (length=13)
                  public 'GlossDef' => 
                    object(stdClass)[7]
                      ...
                  public 'GlossSee' => string 'markup' (length=6)
                  public 'num1' => string '343434343434343434343' (length=21)
                  public 'num2' => string '1112222333344455566' (length=19)
                  public 'num3' => 
                    array (size=3)
                      ...
                  public 'num4' => 
                    array (size=1)
                      ...

修改类

define('SERVICES_JSON_SLICE',   1);
define('SERVICES_JSON_IN_STR',  2);
define('SERVICES_JSON_IN_ARR',  3);
define('SERVICES_JSON_IN_OBJ',  4);
define('SERVICES_JSON_IN_CMT', 5);
define('SERVICES_JSON_LOOSE_TYPE', 16);
define('SERVICES_JSON_SUPPRESS_ERRORS', 32);

class ServicesJSON
{

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

    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 '';
    }
    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 '';
    }


    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':

                // 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 $property) {
                        if(ServicesJSON::isError($property)) {
                            return $property;
                        }
                    }

                    return '{' . join(',', $properties) . '}';
                }

                // treat it like a regular array
                $elements = array_map(array($this, 'encode'), $var);

                foreach($elements as $element) {
                    if(ServicesJSON::isError($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 $property) {
                    if(ServicesJSON::isError($property)) {
                        return $property;
                    }
                }

                return '{' . join(',', $properties) . '}';

            default:
                return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
                    ? 'null'
                    : new ServicesJSON_Error(gettype($var)." can not be encoded as JSON string");
        }
    }


    function name_value($name, $value)
    {
        $encoded_value = $this->encode($value);

        if(ServicesJSON::isError($encoded_value)) {
            return $encoded_value;
        }

        return $this->encode(strval($name)) . ':' . $encoded_value;
    }


    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);
    }


    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)) {
                    /**
                     * @todo BIG INT PATH
                     */
                    return $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']));


                            /**
                             * @todo patch slice
                             */
                            is_numeric($slice) and $slice = "\"$slice\"";
                            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, $code = null) {
        if (is_object($data) && (get_class($data) == 'ServicesJSON_Error' || is_subclass_of($data, 'ServicesJSON_Error'))) {
            return true;
        }

        return false;
    }
}
class ServicesJSON_Error {
    function ServicesJSON_Error($message = 'unknown error', $code = null, $mode = null, $options = null, $userinfo = null) {
    }
}
于 2013-04-06T20:04:51.310 回答
4

我会使用这里描述的解决方案:

实际上,根据文档, JSON_BIGINT_AS_STRING从 5.4 开始才可用。对于早期版本,preg_replace 解决方案可能效果最好,如下所述 - 我会做类似的事情json_decode(preg_replace('/("\w+"):(\d+)/', '\\1:"\\2"', $jsonString), true)– 2011-10-14 04:43:43

于 2013-03-27T13:08:47.323 回答
1

您可以使用phputils项目中的JSON.class.php

class JSON {
    protected $t, $c;
    protected $debug;
    protected $useArrays = false;

    static public function decode($s, $array = false, $debug = false) {
        //return json_decode($s, true, 512, JSON_BIGINT_AS_STRING);
        //return json_decode($s, $array);

        // Version >= 5.4.x will suppoort JSON_BIGINT_AS_STRING parameter.
        if (version_compare(PHP_VERSION, '5.3.99', '>=')) {
            return json_decode($s, $array, 512, JSON_BIGINT_AS_STRING);
        }
        // Not supported JSON_BIGINT_AS_STRING so we will use our class.
        else {
            try {
                $d = new JSON($s);
                $d->useArrays = $array;
                $d->setDebug($debug);
                return $d->parseObject(512);
            } catch (Exception $e) {
                return NULL;
            }
        }
    }

    static public function encode($object) {
        return json_encode($object);
    }

    public function __construct($s) {
        $this->setInput($s);
    }

    public function setInput($s) {
        $vv = array_map(function($a) { return isset($a[1]) ? $a[1] : $a; }, token_get_all('<?php ' . $s));
        $this->t = array_values(array_splice($vv, 1));
        $this->c = 0;
        if ($this->debug) print_r($this->t);
    }

    public function setDebug($debug) {
        $this->debug = $debug;
    }

    protected function getCurrentToken() {
        if ($this->c >= count($this->t)) throw(new Exception("EOF"));
        return $this->t[$this->c];
    }

    protected function nextToken() {
        $this->c++;
    }

    protected function parseString() {
        $ct = $this->getCurrentToken();
        if ($ct[0] != '"') throw(new Exception("JSON: Expecting String but found '" . $ct . "'"));
        $this->nextToken();
        //return stripcslashes(substr($ct, 1, -1));
        return json_decode($ct);
    }

    protected function expectValues($values = array()) {
        $ct = $this->getCurrentToken();
        foreach ($values as $value) if ($ct == $value) {
            $this->nextToken();
            return $ct;
        }
        throw(new Exception("JSON: Expecting [" . implode(', ', array_map(function($a) { return "'{$a}'"; }, $values)) . "]"));
    }

    protected function parseNumber() {
        $ct = $this->getCurrentToken();
        if (!is_numeric($ct)) throw(new Exception("JSON: Expecting a number but found '" . $ct . "'"));
        $this->nextToken();
        if ((string)(int)$ct == (string)$ct) {
            return (int)$ct;
        }
        return $ct;
    }

    protected function parseObject($depth = 512) {
        $ret = NULL;
        if ($depth == -1) throw(new Exception("JSON: Depth too long"));
        $ct = $this->getCurrentToken();
        if ($this->debug) echo "--$ct\n";
        switch ($ct[0]) {
            // Object
            case '{':
                $ret = array();
                $this->nextToken();
                if ($this->getCurrentToken() != '}') {
                    do {
                        $key = $this->parseString();
                        if ($this->debug) echo "---key:$key\n";

                        $this->expectValues(array(':'));

                        $value = $this->parseObject($depth - 1);
                        if ($this->debug) echo "---value:$value\n";

                        $ct = $this->expectValues(array(',', '}'));

                        $ret[$key] = $value;
                    } while ($ct == ',');
                } else {
                    $this->nextToken();
                }
                if (!$this->useArrays) $ret = (object)$ret;
            break;
            // Array
            case '[':
                $ret = array();
                $this->nextToken();
                if ($this->getCurrentToken() != ']') {
                    do {
                        $value = $this->parseObject();
                        if ($this->debug) echo "---value:$value\n";
                        $ct = $this->expectValues(array(',', ']'));
                        $ret[] = $value;
                    } while ($ct == ',');
                } else {
                    $this->nextToken();
                }
                //while ()
            break;
            // String
            case '"':
                $ret = $this->parseString();
            break;
            default:
                if (is_numeric($ct[0])) {
                    $ret = $this->parseNumber();
                } else {
                    switch ($ct) {
                        case "null": $this->nextToken(); return NULL;
                        //case "undefined": $this->nextToken(); return NULL;
                        case "true": $this->nextToken(); return true;
                        case "false": $this->nextToken(); return false;
                        default: throw(new Exception("JSON: Invalid object"));
                    }
                }
            break;
        }
        return $ret;
    }

    static public function unittest() {
        $test = function($expr) {
            $a = JSON::decode($expr);
            $b = json_decode($expr, true);
            var_dump($a === $b);
            if ($a != $b) {
                var_dump($a);
                var_dump($b);
            }
            $a2 = JSON::encode($a);
            $b2 = JSON::encode($b);
            var_dump($a2 === $b2);
            //print_r($a);
            //print_r($b);
        };

        $test2 = function($expr, $b) {
            $a = JSON::decode($expr);
            var_dump($a === $b);
            if ($a != $b) {
                var_dump($a);
                var_dump($b);
            }
            //var_export($a);
        };

        // Empty object.
        $test('{}');

        // Simple object
        $test('{"a":"b"}');

        // Object with comma separated items.
        $test('{"k1":"v1","k2":"v2"}');

        // Simple object with numbers
        $test('{"k1":1,"k2":2}');

        // Simple array with numbers
        $test('[1,2,3,4]');

        $test('"\\u10000"');

        // Array with langbuage's constants.
        $test('[3,false,true,null]');

        // Complex array with subobjects.
        $test('[{},{"a":{"b":1}},3,false,{"test":true}]');

        // Complex array.
        $test2(
            '{"order_id":131608840232655,"buyer":100001738131058,"app":118178464915404,"receiver":100001738131058,"amount":2,"update_time":1292862324,"time_placed":1292862322,"data":"","items":[{"item_id":"0","title":"[Test Mode] Unicorn","description":"[Test Mode] Own your own mythical beast!","image_url":"http:\/\/www.facebook.com\/images\/gifts\/21.png","product_url":"http:\/\/www.facebook.com\/images\/gifts\/21.png","price":2,"data":"{\"product_id\":1}"}],"status":"placed"}',
            array (
                'order_id' => '131608840232655',
                'buyer' => '100001738131058',
                'app' => '118178464915404',
                'receiver' => '100001738131058',
                'amount' => 2,
                'update_time' => 1292862324,
                'time_placed' => 1292862322,
                'data' => '',
                'items' => array (
                    0 => array (
                        'item_id' => '0',
                        'title' => '[Test Mode] Unicorn',
                        'description' => '[Test Mode] Own your own mythical beast!',
                        'image_url' => 'http://www.facebook.com/images/gifts/21.png',
                        'product_url' => 'http://www.facebook.com/images/gifts/21.png',
                        'price' => 2,
                        'data' => '{"product_id":1}',
                    ),
                ),
                'status' => 'placed',
            )
        );
    }

    static public function _unittest() {
        if (basename($_SERVER['PHP_SELF']) == basename(__FILE__)) {
            JSON::unittest();
        }
    }
}

function json_decode_fixed($s, $debug = false) {
    return JSON::decode($s, $debug);
}

JSON::_unittest();
于 2013-04-03T16:57:49.057 回答