function Services_JSON::decode in Video 7
decodes a JSON string into appropriate variable
@access public
Parameters
string $str JSON-formatted string:
Return value
mixed number, boolean, string, array, or object corresponding to given JSON input string. See argument 1 to Services_JSON() above for object-output behavior. Note that decode() always returns strings in ASCII or UTF-8 format!
File
- modules/
video_zencoder/ includes/ lib/ JSON.php, line 483
Class
- Services_JSON
- Converts to and from JSON format.
Code
function decode($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 (double) $str == (int) $str ? (int) $str : (double) $str;
}
elseif (preg_match('/^("|\').*(\\1)$/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':
$utf8 .= chr(0x8);
++$c;
break;
case $substr_chrs_c_2 == '\\t':
$utf8 .= chr(0x9);
++$c;
break;
case $substr_chrs_c_2 == '\\n':
$utf8 .= chr(0xa);
++$c;
break;
case $substr_chrs_c_2 == '\\f':
$utf8 .= chr(0xc);
++$c;
break;
case $substr_chrs_c_2 == '\\r':
$utf8 .= chr(0xd);
++$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;
}
}
}
}