3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('a' => '1', 'b' => '0'); $a1 = array('a' => '2'); $rez = array_merge($a, $a1); print_r($rez);
Output for 4.3.0 - 7.1.0
Array ( [a] => 2 [b] => 0 )