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<?php $a = array('0xa'=>true); var_dump('0xa' == '10'); var_dump(isset($a['10'])); var_dump($a['10']);
based on TMNr7
Output for 7.0.0 - 7.2.0
bool(false) bool(false) Notice: Undefined offset: 10 in /in/uBDle on line 6 NULL
Output for 5.5.0 - 5.6.28
bool(true) bool(false) Notice: Undefined offset: 10 in /in/uBDle on line 6 NULL