3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array( array("item_data"=>array(1,2,3)), array("item_data"=>array(4,5,6)), array("item_data"=>array(7,8,9)) ); function merge($prev, $now) { return array_merge($prev, $now['item_data']); } $res = array_reduce($arr, "merge",array()); var_dump($res);
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.2, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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(9) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5) [5]=> int(6) [6]=> int(7) [7]=> int(8) [8]=> int(9) }
Output for 5.0.3 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: array_merge(): Argument #1 is not an array in /in/0AfO1 on line 6 Warning: array_merge(): Argument #1 is not an array in /in/0AfO1 on line 6 Warning: array_merge(): Argument #1 is not an array in /in/0AfO1 on line 6 NULL
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9
array(10) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> int(5) [6]=> int(6) [7]=> int(7) [8]=> int(8) [9]=> int(9) }
preferences:
250.91 ms | 402 KiB | 399 Q