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<?php $a = array (1, 2, 3); $b = array (4, 5, "a" => 1); var_dump ($a + $b);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) ["a"]=> int(1) }