$json
[, bool $assoc = false
[, int $depth = 512
[, int $options = 0
]]] )
Takes a JSON encoded string and converts it into a PHP variable.
The json string being decoded.
This function only works with UTF-8 encoded strings.
Note:
PHP implements a superset of JSON - it will also encode and decode scalar types and
NULL. The JSON standard only supports these values when they are nested inside an array or an object.
When TRUE, returned objects will be converted into
associative arrays.
User specified recursion depth.
Bitmask of JSON decode options. Currently only
JSON_BIGINT_AS_STRING
is supported (default is to cast large integers as floats)
Returns the value encoded in json in appropriate
PHP type. Values true, false and
null (case-insensitive) are returned as TRUE,
FALSE
and NULL respectively. NULL is returned if the
json cannot be decoded or if the encoded
data is deeper than the recursion limit.
Example #1 json_decode() examples
<?php
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
var_dump(json_decode($json));
var_dump(json_decode($json, true));
?>
The above example will output:
object(stdClass)#1 (5) {
["a"] => int(1)
["b"] => int(2)
["c"] => int(3)
["d"] => int(4)
["e"] => int(5)
}
array(5) {
["a"] => int(1)
["b"] => int(2)
["c"] => int(3)
["d"] => int(4)
["e"] => int(5)
}
| Version | Description |
|---|---|
| 5.4.0 |
The options parameter was added.
|
| 5.3.0 | Added the optional depth. The default recursion depth was
increased from 128 to 512
|
| 5.2.3 | The nesting limit was increased from 20 to 128 |
| 5.2.1 | Added support for JSON decoding of basic types. |
Note:
The JSON spec is not JavaScript, but a subset of JavaScript.
Note:
In the event of a failure to decode, json_last_error() can be used to determine the exact nature of the error.
