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run code in 150+ php & hhvm versions
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<?php $a = array("red", "blue", "green"); $b = array("The Czech Republic", "Argentina", "France"); $result = array_diff($a, $b); var_dump($result);
based on IQHmv
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) "red" [1]=> string(4) "blue" [2]=> string(5) "green" }