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<?php class C { public $a = true; public function __sleep() { return array('a', '1'); } } $a = new C; $s = serialize($a); var_dump($s); var_dump(unserialize($s));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: serialize(): "1" returned as member variable from __sleep() but does not exist in /in/Fprda on line 13 string(24) "O:1:"C":1:{s:1:"a";b:1;}" object(C)#2 (1) { ["a"]=> bool(true) }

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