<?php
$a = $r = $m = [];
$a[1] = ['1','2','3'];
$a[2] = ['4','5','6'];
foreach ($a as $p) {
$r = array_merge($r, $p);
}
var_dump($r);
var_dump(array_map('array_merge', $a, [$r]));
- Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- array(6) {
[0]=>
string(1) "1"
[1]=>
string(1) "2"
[2]=>
string(1) "3"
[3]=>
string(1) "4"
[4]=>
string(1) "5"
[5]=>
string(1) "6"
}
Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /in/1cG5s:9
Stack trace:
#0 [internal function]: array_merge(Array, NULL)
#1 /in/1cG5s(9): array_map('array_merge', Array, Array)
#2 {main}
thrown in /in/1cG5s on line 9
Process exited with code 255. - Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
- array(6) {
[0]=>
string(1) "1"
[1]=>
string(1) "2"
[2]=>
string(1) "3"
[3]=>
string(1) "4"
[4]=>
string(1) "5"
[5]=>
string(1) "6"
}
Warning: array_merge(): Expected parameter 2 to be an array, null given in /in/1cG5s on line 9
array(2) {
[0]=>
array(9) {
[0]=>
string(1) "1"
[1]=>
string(1) "2"
[2]=>
string(1) "3"
[3]=>
string(1) "1"
[4]=>
string(1) "2"
[5]=>
string(1) "3"
[6]=>
string(1) "4"
[7]=>
string(1) "5"
[8]=>
string(1) "6"
}
[1]=>
NULL
}
- Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33
- array(6) {
[0]=>
string(1) "1"
[1]=>
string(1) "2"
[2]=>
string(1) "3"
[3]=>
string(1) "4"
[4]=>
string(1) "5"
[5]=>
string(1) "6"
}
Warning: array_merge(): Argument #2 is not an array in /in/1cG5s on line 9
array(2) {
[0]=>
array(9) {
[0]=>
string(1) "1"
[1]=>
string(1) "2"
[2]=>
string(1) "3"
[3]=>
string(1) "1"
[4]=>
string(1) "2"
[5]=>
string(1) "3"
[6]=>
string(1) "4"
[7]=>
string(1) "5"
[8]=>
string(1) "6"
}
[1]=>
NULL
}
preferences:
175.48 ms | 403 KiB | 197 Q