- array_diff_assoc: documentation ( source)
- var_dump: documentation ( source)
<?php
$array1 = [
'one' => 1,
'two' => 2
];
$array2 = [
'one' => 1,
'two' => 2,
'three' => 3,
'four' => [
'hello' => 1,
'hello2' => 2
]
];
var_dump( array_diff_assoc( $array1, $array2 ) );