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run code in 150+ php & hhvm versions
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<?php $a = array('b' => NULL); var_dump(isset($a['b'])); $b = new ArrayObject($a); var_dump(isset($b['b']));
Output for 5.3.11 - 5.3.29, 5.4.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) bool(false)
Output for 5.0.0 - 5.3.10, 5.4.0
bool(false) bool(true)
Output for 4.3.2 - 4.4.9
bool(false) Fatal error: Cannot instantiate non-existent class: arrayobject in /in/OfXHO on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
bool(false) Fatal error: Cannot instantiate non-existent class: arrayobject in /in/OfXHO on line 5