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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array('052' => 'nanana'); $b = array('042' => 'wayne'); $c = array(42 => 'batman'); var_dump(array_merge($a, 5));
Output for 5.0.0 - 7.2.0
Warning: array_merge(): Argument #2 is not an array in /in/AAm4V on line 7 NULL
Output for 4.3.0 - 4.4.9
array(2) { ["052"]=> string(6) "nanana" [0]=> int(5) }