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<?php $a = array('b' => NULL); var_dump(isset($a['b']), empty($a['b'])); $b = new ArrayObject($a); var_dump(isset($b['b']), empty($a['b']));
Output for 5.3.11 - 5.3.29, 5.4.1 - 7.1.0
bool(false) bool(true) bool(false) bool(true)
Output for 5.0.0 - 5.3.10, 5.4.0
bool(false) bool(true) bool(true) bool(true)
Output for 4.3.2 - 4.4.9
bool(false) bool(true) Fatal error: Cannot instantiate non-existent class: arrayobject in /in/30a8T on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
bool(false) bool(true) Fatal error: Cannot instantiate non-existent class: arrayobject in /in/30a8T on line 5