如何在 php 中比较两个多维数组并返回父键

Question

for example i have two arrays

$first = array(52=>array(10,24),55=>array(5,25))
$two = array(52=>array(10,24),55=>array(10,25))

in above two arrays how to return parent key if arrays values are not match, expected out put is

array(0=>55) 

Answer 1

You need array_udiff :

$first = array(52=>array(10,24),55=>array(5,25));
$two = array(52=>array(10,24),55=>array(10,25));

function compare_func($a, $b)
{
    if ($a === $b) {
        return 0;
    }
    return ($a > $b)? 1:-1;
}
$diff = array_udiff($first, $two, 'compare_func');

print_r(array_keys($diff));

Array
(
    [0] => 55
)