Recursively computes the intersection of arrays using keys for comparison.

Parameters

$array1arrayrequired

The array with master keys to check.

$array2arrayrequired

An array to compare keys against.

Return

Source

function _rest_array_intersect_key_recursive( $array1, $array2 ) {
	$array1 = array_intersect_key( $array1, $array2 );
	foreach ( $array1 as $key => $value ) {
		if ( is_array( $value ) && is_array( $array2[ $key ] ) ) {
			$array1[ $key ] = _rest_array_intersect_key_recursive( $value, $array2[ $key ] );
		}
	}
	return $array1;
}

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