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<?php $a = array( 'foo', 'bar', ); $b = array( 'baz1', 'baz2', 'baz3', ); $a += $b; var_dump($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> string(3) "foo" [1]=> string(3) "bar" [2]=> string(4) "baz3" }