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