diff --git wp-includes/class-json.php wp-includes/class-json.php index 58f6f7d..1e8588d 100644 --- wp-includes/class-json.php +++ wp-includes/class-json.php @@ -1,5 +1,5 @@ - * @author Matt Knapp - * @author Brett Stimmerman - * @copyright 2005 Michal Migurski - * @version CVS: $Id: JSON.php 288200 2009-09-09 15:41:29Z alan_k $ - * @license http://www.opensource.org/licenses/bsd-license.php - * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 + * @package Services_JSON + * @author Michal Migurski + * @author Matt Knapp + * @author Brett Stimmerman + * @copyright 2005 Michal Migurski + * @version CVS: $Id: JSON.php 305040 2010-11-02 23:19:03Z alan_k $ + * @license http://www.opensource.org/licenses/bsd-license.php + * @link 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); +define('SERVICES_JSON_SLICE', 1); /** * Marker constant for Services_JSON::decode(), used to flag stack state @@ -92,6 +92,11 @@ define('SERVICES_JSON_LOOSE_TYPE', 16); define('SERVICES_JSON_SUPPRESS_ERRORS', 32); /** + * Behavior switch for Services_JSON::decode() + */ +define('SERVICES_JSON_USE_TO_JSON', 64); + +/** * Converts to and from JSON format. * * Brief example of use: @@ -114,749 +119,818 @@ define('SERVICES_JSON_SUPPRESS_ERRORS', 32); */ class Services_JSON { - /** - * constructs a new JSON instance - * - * @param 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. - * - * @param string $utf16 UTF-16 character - * @return string UTF-8 character - * @access private - */ - function utf162utf8($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. - * - * @param string $utf8 UTF-8 character - * @return string UTF-16 character - * @access private - */ - function utf82utf16($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 (and sends JSON Header) - * - * @param mixed $var any number, boolean, string, array, or object to be encoded. - * see argument 1 to Services_JSON() above for array-parsing behavior. - * if var is a strng, note that encode() always expects it - * to be in ASCII or UTF-8 format! - * - * @return mixed JSON string representation of input var or an error if a problem occurs - * @access public - */ - function encode($var) - { - header('Content-type: application/json'); - return $this->_encode($var); - } - /** - * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow CSS!!!!) - * - * @param mixed $var any number, boolean, string, array, or object to be encoded. - * see argument 1 to Services_JSON() above for array-parsing behavior. - * if var is a strng, note that encode() always expects it - * to be in ASCII or UTF-8 format! - * - * @return mixed JSON string representation of input var or an error if a problem occurs - * @access public - */ - function encodeUnsafe($var) - { - return $this->_encode($var); - } - /** - * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format - * - * @param mixed $var any number, boolean, string, array, or object to be encoded. - * see argument 1 to Services_JSON() above for array-parsing behavior. - * if var is a strng, note that encode() always expects it - * to be in ASCII or UTF-8 format! - * - * @return mixed JSON string representation of input var or an error if a problem occurs - * @access public - */ - function _encode($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 (($ord_var_c & 0xE0) == 0xC0): - // characters U-00000080 - U-000007FF, mask 110XXXXX - // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 - if ($c+1 >= $strlen_var) { - $c += 1; - $ascii .= '?'; - break; - } - - $char = pack('C*', $ord_var_c, ord($var[$c + 1])); - $c += 1; - $utf16 = $this->utf82utf16($char); - $ascii .= sprintf('\u%04s', bin2hex($utf16)); - break; - - case (($ord_var_c & 0xF0) == 0xE0): - if ($c+2 >= $strlen_var) { - $c += 2; - $ascii .= '?'; - break; - } - // 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 (($ord_var_c & 0xF8) == 0xF0): - if ($c+3 >= $strlen_var) { - $c += 3; - $ascii .= '?'; - break; - } - // 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 (($ord_var_c & 0xFC) == 0xF8): - // characters U-00200000 - U-03FFFFFF, mask 111110XX - // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 - if ($c+4 >= $strlen_var) { - $c += 4; - $ascii .= '?'; - break; - } - $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 (($ord_var_c & 0xFE) == 0xFC): - if ($c+5 >= $strlen_var) { - $c += 5; - $ascii .= '?'; - break; - } - // 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 - * - * @param string $name name of key to use - * @param mixed $value reference to an array element to be encoded - * - * @return string JSON-formatted name-value pair, like '"name":value' - * @access private - */ - function name_value($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 - * - * @param $str string string value to strip of comments and whitespace - * - * @return string string value stripped of comments and whitespace - * @access private - */ - function reduce_string($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 - * - * @param string $str JSON-formatted string - * - * @return mixed number, boolean, string, array, or object - * corresponding to given JSON input string. - * See argument 1 to Services_JSON() above for object-output behavior. - * Note that decode() always returns strings - * in ASCII or UTF-8 format! - * @access public - */ - function decode($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; - } + /** + * constructs a new JSON instance + * + * @param int $use object behavior flags; combine with boolean-OR + * + * possible values: + * - SERVICES_JSON_LOOSE_TYPE: loose typing. + * "{...}" syntax creates associative arrays + * instead of objects in decode(). + * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. + * Values which can't be encoded (e.g. resources) + * appear as NULL instead of throwing errors. + * By default, a deeply-nested resource will + * bubble up with an error, so all return values + * from encode() should be checked with isError() + * - SERVICES_JSON_USE_TO_JSON: call toJSON when serializing objects + * It serializes the return value from the toJSON call rather + * than the object it'self, toJSON can return associative arrays, + * strings or numbers, if you return an object, make sure it does + * not have a toJSON method, otherwise an error will occur. + */ + function Services_JSON($use = 0) + { + $this->use = $use; + $this->_mb_strlen = function_exists('mb_strlen'); + $this->_mb_convert_encoding = function_exists('mb_convert_encoding'); + $this->_mb_substr = function_exists('mb_substr'); + } + // private - cache the mbstring lookup results.. + var $_mb_strlen = false; + var $_mb_substr = false; + var $_mb_convert_encoding = false; + + /** + * 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. + * + * @param string $utf16 UTF-16 character + * @return string UTF-8 character + * @access private + */ + function utf162utf8($utf16) + { + // oh please oh please oh please oh please oh please + if($this->_mb_convert_encoding) { + return mb_convert_encoding($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. + * + * @param string $utf8 UTF-8 character + * @return string UTF-16 character + * @access private + */ + function utf82utf16($utf8) + { + // oh please oh please oh please oh please oh please + if($this->_mb_convert_encoding) { + return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); + } + + switch($this->strlen8($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 (and sends JSON Header) + * + * @param mixed $var any number, boolean, string, array, or object to be encoded. + * see argument 1 to Services_JSON() above for array-parsing behavior. + * if var is a strng, note that encode() always expects it + * to be in ASCII or UTF-8 format! + * + * @return mixed JSON string representation of input var or an error if a problem occurs + * @access public + */ + function encode($var) + { + header('Content-type: application/json'); + return $this->encodeUnsafe($var); + } + /** + * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow XSS!!!!) + * + * @param mixed $var any number, boolean, string, array, or object to be encoded. + * see argument 1 to Services_JSON() above for array-parsing behavior. + * if var is a strng, note that encode() always expects it + * to be in ASCII or UTF-8 format! + * + * @return mixed JSON string representation of input var or an error if a problem occurs + * @access public + */ + function encodeUnsafe($var) + { + // see bug #16908 - regarding numeric locale printing + $lc = setlocale(LC_NUMERIC, 0); + setlocale(LC_NUMERIC, 'C'); + $ret = $this->_encode($var); + setlocale(LC_NUMERIC, $lc); + return $ret; + + } + /** + * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format + * + * @param mixed $var any number, boolean, string, array, or object to be encoded. + * see argument 1 to Services_JSON() above for array-parsing behavior. + * if var is a strng, note that encode() always expects it + * to be in ASCII or UTF-8 format! + * + * @return mixed JSON string representation of input var or an error if a problem occurs + * @access public + */ + function _encode($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 = $this->strlen8($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 (($ord_var_c & 0xE0) == 0xC0): + // characters U-00000080 - U-000007FF, mask 110XXXXX + // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 + if ($c+1 >= $strlen_var) { + $c += 1; + $ascii .= '?'; + break; + } + + $char = pack('C*', $ord_var_c, ord($var{$c + 1})); + $c += 1; + $utf16 = $this->utf82utf16($char); + $ascii .= sprintf('\u%04s', bin2hex($utf16)); + break; + + case (($ord_var_c & 0xF0) == 0xE0): + if ($c+2 >= $strlen_var) { + $c += 2; + $ascii .= '?'; + break; + } + // 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 (($ord_var_c & 0xF8) == 0xF0): + if ($c+3 >= $strlen_var) { + $c += 3; + $ascii .= '?'; + break; + } + // 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 (($ord_var_c & 0xFC) == 0xF8): + // characters U-00200000 - U-03FFFFFF, mask 111110XX + // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 + if ($c+4 >= $strlen_var) { + $c += 4; + $ascii .= '?'; + break; + } + $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 (($ord_var_c & 0xFE) == 0xFC): + if ($c+5 >= $strlen_var) { + $c += 5; + $ascii .= '?'; + break; + } + // 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(',', $elements) . ']'; + + case 'object': + + // support toJSON methods. + if (($this->use & SERVICES_JSON_USE_TO_JSON) && method_exists($var, 'toJSON')) { + // this may end up allowing unlimited recursion + // so we check the return value to make sure it's not got the same method. + $recode = $var->toJSON(); + + if (method_exists($recode, 'toJSON')) { + + return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) + ? 'null' + : new Services_JSON_Error(class_name($var). + " toJSON returned an object with a toJSON method."); + + } + + return $this->_encode( $recode ); + } + + $vars = get_object_vars($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 + * + * @param string $name name of key to use + * @param mixed $value reference to an array element to be encoded + * + * @return string JSON-formatted name-value pair, like '"name":value' + * @access private + */ + function name_value($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 + * + * @param $str string string value to strip of comments and whitespace + * + * @return string string value stripped of comments and whitespace + * @access private + */ + function reduce_string($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 + * + * @param string $str JSON-formatted string + * + * @return mixed number, boolean, string, array, or object + * corresponding to given JSON input string. + * See argument 1 to Services_JSON() above for object-output behavior. + * Note that decode() always returns strings + * in ASCII or UTF-8 format! + * @access public + */ + function decode($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 = $this->substr8($str, 0, 1); + $chrs = $this->substr8($str, 1, -1); + $utf8 = ''; + $strlen_chrs = $this->strlen8($chrs); + + for ($c = 0; $c < $strlen_chrs; ++$c) { + + $substr_chrs_c_2 = $this->substr8($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', $this->substr8($chrs, $c, 6)): + // single, escaped unicode character + $utf16 = chr(hexdec($this->substr8($chrs, ($c + 2), 2))) + . chr(hexdec($this->substr8($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 .= $this->substr8($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 .= $this->substr8($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 .= $this->substr8($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 .= $this->substr8($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 .= $this->substr8($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 = $this->substr8($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 = $this->strlen8($chrs); + + for ($c = 0; $c <= $strlen_chrs; ++$c) { + + $top = end($stk); + $substr_chrs_c_2 = $this->substr8($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 = $this->substr8($chrs, $top['where'], ($c - $top['where'])); + array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); + //print("Found split at {$c}: ".$this->substr8($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*:/Uis', $slice, $parts)) { + // "name":value pair + $key = $this->decode($parts[1]); + $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B")); + if ($this->use & SERVICES_JSON_LOOSE_TYPE) { + $obj[$key] = $val; + } else { + $obj->$key = $val; + } + } elseif (preg_match('/^\s*(\w+)\s*:/Uis', $slice, $parts)) { + // name:value pair, where name is unquoted + $key = $parts[1]; + $val = $this->decode(trim(substr($slice, strlen($parts[0])), ", \t\n\r\0\x0B")); + + if ($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) && + (($this->strlen8($this->substr8($chrs, 0, $c)) - $this->strlen8(rtrim($this->substr8($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 {$c}: ".$this->substr8($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 {$c}: ".$this->substr8($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 {$c}: ".$this->substr8($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}: ".$this->substr8($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; + } + + /** + * Calculates length of string in bytes + * @param string + * @return integer length + */ + function strlen8( $str ) + { + if ( $this->_mb_strlen ) { + return mb_strlen( $str, "8bit" ); + } + return strlen( $str ); + } + + /** + * Returns part of a string, interpreting $start and $length as number of bytes. + * @param string + * @param integer start + * @param integer length + * @return integer length + */ + function substr8( $string, $start, $length=false ) + { + if ( $length === false ) { + $length = $this->strlen8( $string ) - $start; + } + if ( $this->_mb_substr ) { + return mb_substr( $string, $start, $length, "8bit" ); + } + return substr( $string, $start, $length ); + } + } if (class_exists('PEAR_Error')) { - class Services_JSON_Error extends PEAR_Error - { - function Services_JSON_Error($message = 'unknown error', $code = null, - $mode = null, $options = null, $userinfo = null) - { - parent::PEAR_Error($message, $code, $mode, $options, $userinfo); - } - } + class Services_JSON_Error extends PEAR_Error + { + function Services_JSON_Error($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, $userinfo = null) - { - - } - } - + /** + * @todo Ultimately, this class shall be descended from PEAR_Error + */ + class Services_JSON_Error + { + function Services_JSON_Error($message = 'unknown error', $code = null, + $mode = null, $options = null, $userinfo = null) + { + + } + } + } -endif; + +endif; \ No newline at end of file