<?php
$A = [3,45,67,8];
$B = [ 1 => [1,6,8],
2 => [5,67,3,4,5,66,6],
3 => [55,56,57,58],
4 => [45,80,81,82]
];
$result = [];
foreach ($B as $key => $haystack) {
if (array_intersect($haystack, $A)) {
$result[] = $key;
}
}
var_export($result);
- Output for 5.6.38, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- array (
0 => 1,
1 => 2,
2 => 4,
)
preferences:
179.38 ms | 403 KiB | 169 Q