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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array(); $a['hi'] += 5; print_r($a);
Output for 5.3.0 - 7.2.0
Notice: Undefined index: hi in /in/GOKbp on line 4 Array ( [hi] => 5 )
Output for 4.3.0 - 5.2.17
Notice: Undefined index: hi in /in/GOKbp on line 4 Array ( [hi] => 5 )