JSON Functions
json_encode
JSON Functions
PHP Manual

# json_decode

(PHP 5 >= 5.2.0, PECL json >= 1.2.0)

json_decode — Decodes a JSON string

### Descripción

mixed json_decode ( string `$json` [, bool `$assoc`= false [, int `$depth`= 512 ]] )

Takes a JSON encoded string and converts it into a PHP variable.

### Lista de parámetros

`json`

  The `json` string being decoded.

`assoc`

  When `TRUE`, returned objects will be converted into associative arrays.

`depth`

### Valores retornados

Returns an object or if the optional `assoc` parameter is `TRUE`, an associative array is instead returned.

### Ejemplos

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));
?>`

El resultado del ejemplo seria:

    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)
    }

Example #2 Another example

`<?php
$json = '{"foo-bar": 12345}';
$obj = json_decode($json);
print $obj->{'foo-bar'}; // 12345
?>`

Example #3 common mistakes using json_decode()

`<?php
// the following strings are valid JavaScript but not valid JSON
// the name and value must be enclosed in double quotes
// single quotes are not valid
$bad_json = "{ 'bar': 'baz' }";
json_decode($bad_json); // null
// the name must be enclosed in double quotes
$bad_json = '{ bar: "baz" }';
json_decode($bad_json); // null
// trailing commas are not allowed
$bad_json = '{ bar: "baz", }';
json_decode($bad_json); // null
?>`

### Notes

> Note: The JSON spec is not JavaScript, but a subset of JavaScript.

Caution

This function will return `FALSE` if the JSON encoded data is deeper than 127 elements.

### Registro de cambios

Versión | Descripción
--- | ---
5.2.3 | The nesting limit was increased from 20 to 128

### Ver también

- json_encode() - Returns the JSON representation of a value

JSON Functions
json_encode
JSON Functions
PHP Manual