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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a1 = array(2,1); $a2 = array(2); $b = array_diff_assoc($a1, $a2); var_dump($b);
based on UKDCS
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { [1]=> int(1) }