php remove from array if property value is in another array

Question

I want to remove all elements from arr2 that have a type contained in arr1:

    arr1 = ['A', 'B', 'C']

    arr2 = [
        [
        'name' => 'jane',
        'type' => 'X'
        ],
        [
        'name' => 'jon',
        'type' => 'B'
        ]
    ]

So jon should be removed. Is there some built in function like array_diff?

Answer 1

One of solutions using array_filter:

print_r(array_filter(
    $arr2, 
    function($v) use($arr1) { return !in_array($v['type'], $arr1); }
));

Answer 2

Here's another if the type is unique:

$result = array_diff_key(array_column($arr2, null, 'type'), array_flip($arr1));

• extract an array from $arr2 keyed (indexed) by the type column
• flip $arr1 to get values as keys
• get the key differences

Run array_values on it to re-index if needed.

Answer 3

I don't think there's a way to do it with just one built-in array function, but you can combine some of them to do it.

$record_types = array_column($arr2, 'type');

$records_to_keep = array_diff($record_types, $arr1);

$result = array_intersect_key($arr2, $records_to_keep);

Answer 4

Foreach the 2nd array and check if the type is in arr1. If so then simply delete(unset) it.

foreach(array_keys(arr2) as $Key) {
   if (in_array(arr2[$Key]['type'],arr1)) { unset(arr2[$Key]); }
}