--TEST-- __wakeup can add dynamic properties without affecting other objects --FILE-- a being a dynamic property. function __construct($a) { $this->a = $a; } public function __wakeup() { echo "Calling __wakeup\n"; for ($i = 0; $i < 10000; $i++) { $this->{'b' . $i} = 42; } } } function main() { $array = array("roh"); // array (not a reference, but should be copied on write) $a = new Obj($array); $b = new Obj($array); $c = new Obj(null); $variable = array($a, $b, $c); $serialized = igbinary_serialize($variable); printf("%s\n", bin2hex($serialized)); $unserialized = igbinary_unserialize($serialized); echo "Called igbinary_unserialize\n"; for ($a = 0; $a < 3; $a++) { for ($i = 0; $i < 10000; $i++) { if ($unserialized[$a]->{'b' . $i} !== 42) { echo "Fail $a b$i\n"; return; } unset($unserialized[$a]->{'b' . $i}); } } var_dump($unserialized); } main(); --EXPECTF-- 000000021403060017034f626a1401110161140106001103726f6806011a0014010e01010206021a0014010e0100 Calling __wakeup Calling __wakeup Calling __wakeup Called igbinary_unserialize array(3) { [0]=> object(Obj)#%d (1) { ["a"]=> array(1) { [0]=> string(3) "roh" } } [1]=> object(Obj)#%d (1) { ["a"]=> array(1) { [0]=> string(3) "roh" } } [2]=> object(Obj)#%d (1) { ["a"]=> NULL } }