php怎么将一个对象转化成数组

$array = (array) $object;        //强制类型转换，使用默认键名$array = (array)($object);       //同上$array = (array) $object_arrray; //强制类型转换并指定键名数组

class Person{    public $name = "David";    public $age = 32;    public $profession = "Software Engineer";}class Company{    public $name = "ABC Company";    public $employees;        public function __construct() {        $this->employees = array(            new Person(),            new Person(),            new Person()        );    }}$company = new Company();$array = (array)($company);print_r($array);

Array(    [name] => ABC Company    [employees] => Array        (            [0] => Person Object                (                    [name] => David                    [age] => 32                    [profession] => Software Engineer                )            [1] => Person Object                (                    [name] => David                    [age] => 32                    [profession] => Software Engineer                )            [2] => Person Object                (                    [name] => David                    [age] => 32                    [profession] => Software Engineer                )        ))

class Person{    public $name = "David";    public $age = 32;    public $profession = "Software Engineer";        public function run() {        echo "I am running...";    }        public function sleep() {        echo "I am sleeping...";    }        public function __sleep() {        return array(            "name",            "age",            "profession"        );    }        public function __wakeup() {    }}$person = new Person();$array = (array)($person);print_r($array);

Array(    [name] => David    [age] => 32    [profession] => Software Engineer)