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<?php var_dump(unserialize('O:8:"stdClass":a:{}')); var_dump(unserialize('a:+0:{}'));
Output for 4.3.2 - 5.6.28, 7.0.0 - 7.1.0
Notice: unserialize(): Error at offset 18 of 19 bytes in /in/8kOtA on line 3 bool(false) array(0) { }
Output for hhvm-3.10.0 - 3.12.0
Notice: Unable to unserialize: [O:8:"stdClass":a:{}]. Expected ':' but got 'a'. in /in/8kOtA on line 3 bool(false) Notice: Unable to unserialize: [a:+0:{}]. Expected ':' but got '+'. in /in/8kOtA on line 4 bool(false)
Output for 4.3.0 - 4.3.1
Notice: unserialize() [http://www.php.net/function.unserialize]: Error at offset 18 of 19 bytes in /in/8kOtA on line 3 bool(false) array(0) { }