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<?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"); print_r($res);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in /in/Jm2s4:6 Stack trace: #0 /in/Jm2s4(6): array_merge(NULL, Array) #1 [internal function]: merge(NULL, Array) #2 /in/Jm2s4(8): array_reduce(Array, 'merge') #3 {main} thrown in /in/Jm2s4 on line 6
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/Jm2s4 on line 6 Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/Jm2s4 on line 6 Warning: array_merge(): Expected parameter 1 to be an array, null given in /in/Jm2s4 on line 6
Output for 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: array_merge(): Argument #1 is not an array in /in/Jm2s4 on line 6 Warning: array_merge(): Argument #1 is not an array in /in/Jm2s4 on line 6 Warning: array_merge(): Argument #1 is not an array in /in/Jm2s4 on line 6
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9 )
Output for 4.3.0 - 4.3.2
Array ( [item_data] => Array ( [0] => 1 [1] => 2 [2] => 3 ) [0] => 4 [1] => 5 [2] => 6 [3] => 7 [4] => 8 [5] => 9 )
preferences:
210.21 ms | 402 KiB | 356 Q