/**
* decodes a JSON string into appropriate variable
*
* @param string $str JSON-formatted string
*
* @return mixed number, boolean, string, array, or object
* corresponding to given JSON input string.
* See argument 1 to JSON() above for object-output behavior.
* Note that decode() always returns strings
* in ASCII or UTF-8 format!
* @access public
*/
function decode($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 (double) $str == (int) $str ? (int) $str : (double) $str;
} elseif (preg_match('/^("|\').+("|\')$/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[$c]);
switch ($substr_chrs_c_2) {
case '\\b':
$utf8 .= chr(0x8);
$c += 1;
break;
case '\\t':
$utf8 .= chr(0x9);
$c += 1;
break;
case '\\n':
$utf8 .= chr(0xa);
$c += 1;
break;
case '\\f':
$utf8 .= chr(0xc);
$c += 1;
break;
case '\\r':
$utf8 .= chr(0xd);
$c += 1;
break;
case '\\"':
case '\\\'':
case '\\\\':
case '\\/':
if ($delim == '"' && $substr_chrs_c_2 != '\\\'' || $delim == "'" && $substr_chrs_c_2 != '\\"') {
$utf8 .= $chrs[++$c];
}
break;
default:
if (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 .= mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
$utf8 .= utf16be_to_utf8($utf16);
$c += 5;
} elseif ($ord_chrs_c >= 0x20 && $ord_chrs_c <= 0x7f) {
$utf8 .= $chrs[$c];
} elseif (($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);
$c += 1;
} elseif (($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);
$c += 2;
} elseif (($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);
$c += 3;
} elseif (($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);
$c += 4;
} elseif (($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(JSON_IN_ARR);
$arr = array();
} else {
if ($this->use == JSON_LOOSE_TYPE) {
$stk = array(JSON_IN_OBJ);
$obj = array();
} else {
$stk = array(JSON_IN_OBJ);
$obj = new stdClass();
}
}
array_push($stk, array('what' => JSON_SLICE, 'where' => 0, 'delim' => false));
$chrs = substr($str, 1, -1);
$chrs = $this->reduce_string($chrs);
if ($chrs == '') {
if (reset($stk) == 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'] == 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' => JSON_SLICE, 'where' => $c + 1, 'delim' => false));
//print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
if (reset($stk) == JSON_IN_ARR) {
// we are in an array, so just push an element onto the stack
array_push($arr, $this->decode($slice));
} elseif (reset($stk) == JSON_IN_OBJ) {
// we are in an object, so figure
// out the property name and set an
// element in an associative array,
// for now
if (preg_match('/^\\s*(["\'].*[^\\\\]["\'])\\s*:\\s*(\\S.*),?$/Uis', $slice, $parts)) {
// "name":value pair
$key = $this->decode($parts[1]);
$val = $this->decode($parts[2]);
if ($this->use == 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 == JSON_LOOSE_TYPE) {
$obj[$key] = $val;
} else {
$obj->{$key} = $val;
}
}
}
} elseif (($chrs[$c] == '"' || $chrs[$c] == "'") && in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
// found a quote, and we are not inside a string
array_push($stk, array('what' => JSON_IN_STR, 'where' => $c, 'delim' => $chrs[$c]));
//print("Found start of string at {$c}\n");
} elseif ($chrs[$c] == $top['delim'] && $top['what'] == JSON_IN_STR && ($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(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
// found a left-bracket, and we are in an array, object, or slice
array_push($stk, array('what' => JSON_IN_ARR, 'where' => $c, 'delim' => false));
//print("Found start of array at {$c}\n");
} elseif ($chrs[$c] == ']' && $top['what'] == JSON_IN_ARR) {
// found a right-bracket, and we're in an array
array_pop($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(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
// found a left-brace, and we are in an array, object, or slice
array_push($stk, array('what' => JSON_IN_OBJ, 'where' => $c, 'delim' => false));
//print("Found start of object at {$c}\n");
} elseif ($chrs[$c] == '}' && $top['what'] == JSON_IN_OBJ) {
// found a right-brace, and we're in an object
array_pop($stk);
//print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
} elseif ($substr_chrs_c_2 == '/*' && in_array($top['what'], array(JSON_SLICE, JSON_IN_ARR, JSON_IN_OBJ))) {
// found a comment start, and we are in an array, object, or slice
array_push($stk, array('what' => JSON_IN_CMT, 'where' => $c, 'delim' => false));
$c++;
//print("Found start of comment at {$c}\n");
} elseif ($substr_chrs_c_2 == '*/' && $top['what'] == JSON_IN_CMT) {
// found a comment end, and we're in one now
array_pop($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) == JSON_IN_ARR) {
return $arr;
} elseif (reset($stk) == JSON_IN_OBJ) {
return $obj;
}
}
}
}
/**
* Convert from UTF-16BE to UTF-8
*/
function test_from16be()
{
$this->assertEqual(utf16be_to_utf8($this->utf16), $this->utf8);
}
