3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = array('description' => 'desc bla bla bla', 'summary' => 'summary bla bla bla', 'usage' => 'usage bla bla bla'); $array2 = array('description', 'summary'); $array_intersected = array_intersect(array_flip($array1), $array2); var_dump($array_intersected);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(2) { ["desc bla bla bla"]=> string(11) "description" ["summary bla bla bla"]=> string(7) "summary" }
preferences:
305.65 ms | 406 KiB | 422 Q