- print_r: documentation ( source)
- array_udiff: documentation ( source)
<?php
$a1 = [
['127.0.0.1',11211],
['127.0.0.2',11211],
['127.0.0.4',11211],
];
$a2 = [
['127.0.0.1',11211],
['127.0.0.2',11211],
['127.0.0.3',11211],
['127.0.0.4',11211],
];
print_r(
array_udiff(
$a1,
$a2,
function($a,$b){
return $a[0] === $b[0];
}
)
);