3v4l.org

run code in 300+ PHP versions simultaneously
<?php function flat_map(callable $callback, array $collection) { return array_merge([], ...array_map($callback, $collection)); }; var_dump( array_map(function ($el) { return str_split($el); }, ["two birds", "three green peas"]) ); var_dump( flat_map(function ($el) { return str_split($el); }, ["two birds", "three green peas"]) ); var_dump( flat_map(function ($el) { return str_split($el); }, []) );
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> array(9) { [0]=> string(1) "t" [1]=> string(1) "w" [2]=> string(1) "o" [3]=> string(1) " " [4]=> string(1) "b" [5]=> string(1) "i" [6]=> string(1) "r" [7]=> string(1) "d" [8]=> string(1) "s" } [1]=> array(16) { [0]=> string(1) "t" [1]=> string(1) "h" [2]=> string(1) "r" [3]=> string(1) "e" [4]=> string(1) "e" [5]=> string(1) " " [6]=> string(1) "g" [7]=> string(1) "r" [8]=> string(1) "e" [9]=> string(1) "e" [10]=> string(1) "n" [11]=> string(1) " " [12]=> string(1) "p" [13]=> string(1) "e" [14]=> string(1) "a" [15]=> string(1) "s" } } array(25) { [0]=> string(1) "t" [1]=> string(1) "w" [2]=> string(1) "o" [3]=> string(1) " " [4]=> string(1) "b" [5]=> string(1) "i" [6]=> string(1) "r" [7]=> string(1) "d" [8]=> string(1) "s" [9]=> string(1) "t" [10]=> string(1) "h" [11]=> string(1) "r" [12]=> string(1) "e" [13]=> string(1) "e" [14]=> string(1) " " [15]=> string(1) "g" [16]=> string(1) "r" [17]=> string(1) "e" [18]=> string(1) "e" [19]=> string(1) "n" [20]=> string(1) " " [21]=> string(1) "p" [22]=> string(1) "e" [23]=> string(1) "a" [24]=> string(1) "s" } array(0) { }

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
32.39 ms | 409 KiB | 5 Q