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run code in 200+ php & hhvm versions
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<?php class A { public $a; protected $b; private $c; public function __construct() { $this->a = 'A_a'; $this->b = 'A_b'; $this->c = 'A_c'; } } class B extends A { public $b; private $c; public function __construct() { parent::__construct(); $this->b = 'B_b'; $this->c = 'B_c'; } } $b = new B; var_dump($b); $array = (array) $b; var_dump($array); foreach ($array as $k => $v) { var_dump([bin2hex($k), $k, $v]); }
Output for 5.6.30, hhvm-3.15.4 - 3.22.0, 7.0.0 - 7.2.9
object(B)#1 (4) { ["b"]=> string(3) "B_b" ["c":"B":private]=> string(3) "B_c" ["a"]=> string(3) "A_a" ["c":"A":private]=> string(3) "A_c" } array(4) { ["b"]=> string(3) "B_b" ["Bc"]=> string(3) "B_c" ["a"]=> string(3) "A_a" ["Ac"]=> string(3) "A_c" } array(3) { [0]=> string(2) "62" [1]=> string(1) "b" [2]=> string(3) "B_b" } array(3) { [0]=> string(8) "00420063" [1]=> string(4) "Bc" [2]=> string(3) "B_c" } array(3) { [0]=> string(2) "61" [1]=> string(1) "a" [2]=> string(3) "A_a" } array(3) { [0]=> string(8) "00410063" [1]=> string(4) "Ac" [2]=> string(3) "A_c" }