Convert a PHP object to an associative array

Question

I'm integrating an API to my website which works with data stored in objects while my code is written using arrays.

I'd like a quick-and-dirty function to convert an object to an array.

Answer 1

You can quickly convert deeply nested objects to associative arrays by relying on the behavior of the JSON encode/decode functions:

$array = json_decode(json_encode($nested_object), true); 

Answer 2

Just typecast it

$array = (array) $yourObject; 

From Arrays:

If an object is converted to an array, the result is an array whose elements are the object's properties. The keys are the member variable names, with a few notable exceptions: integer properties are unaccessible; private variables have the class name prepended to the variable name; protected variables have a '*' prepended to the variable name. These prepended values have null bytes on either side.

Example: Simple Object

$object = new StdClass; $object->foo = 1; $object->bar = 2;  var_dump( (array) $object ); 

Output:

array(2) {   'foo' => int(1)   'bar' => int(2) } 

Example: Complex Object

class Foo {     private $foo;     protected $bar;     public $baz;      public function __construct()     {         $this->foo = 1;         $this->bar = 2;         $this->baz = new StdClass;     } }  var_dump( (array) new Foo ); 

Output (with \0s edited in for clarity):

array(3) {   '\0Foo\0foo' => int(1)   '\0*\0bar' => int(2)   'baz' => class stdClass#2 (0) {} } 

Output with var_export instead of var_dump:

array (   '' . "\0" . 'Foo' . "\0" . 'foo' => 1,   '' . "\0" . '*' . "\0" . 'bar' => 2,   'baz' =>   stdClass::__set_state(array(   )), ) 

Typecasting this way will not do deep casting of the object graph and you need to apply the null bytes (as explained in the manual quote) to access any non-public attributes. So this works best when casting StdClass objects or objects with only public properties. For quick and dirty (what you asked for) it's fine.

Also see this in-depth blog post:

• Fast PHP Object to Array conversion