3v4l.org

run code in 150+ php & hhvm versions
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<?php $a = array(array("a","Z"),array("b","Y"),array("c","X")); $b = array_map("reset",$a); var_dump($b);
based on jJFoD
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(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" }