JsonHelper::decode()
\nn\t3::JsonHelper()->decode($str, $useArray = true);
Converts a JS object string into an array.
$data = \Nng\Nnhelpers\Helpers\JsonHelper::decode( "{title:'Test', cat:[2,3,4]}" );
print_r($data);
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The PHP function json_decode() only works with JSON syntax: {"key": "value"}. Neither line breaks nor comments are allowed in JSON.
This function can also be used to parse strings in JavaScript notation.
| @return array|string
Source Code
public static function decode($str, $useArray=true)
{
$str = trim($str);
if(function_exists('json_decode'))
{
$json = json_decode($str,$useArray);
if($json !== null)
return $json;
}
$str = self::reduceString($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)));
$utf8 .= self::utf16beToUTF8($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);
$arr = array();
} else {
if ($useArray) {
$stk = array(self::JSON_IN_OBJ);
$obj = array();
} else {
$stk = array(self::JSON_IN_OBJ);
$obj = new stdClass();
}
}
$stk[] = array('what' => self::JSON_SLICE, 'where' => 0, 'delim' => false);
$chrs = substr($str, 1, -1);
$chrs = self::reduceString($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']));
$stk[] = array('what' => self::JSON_SLICE, 'where' => ($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
$val = self::decode($slice,$useArray);
if (is_string($val)) $val = html_entity_decode($val);
$arr[] = $val;
} elseif (reset($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
$key = self::decode($parts[1],$useArray);
$val = self::decode($parts[2],$useArray);
if (is_string($val)) $val = html_entity_decode($val);
if ($useArray) {
$obj[$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];
$val = self::decode($parts[2],$useArray);
if (is_string($val)) $val = html_entity_decode($val);
if ($useArray) {
$obj[$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
$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
$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
$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
$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;
}
}
}
}
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