_rest_array_intersect_key_recursive() │ WP 5.3.0

Recursively computes the intersection of arrays using keys for comparison.

Внутренняя функция — эта функция рассчитана на использование самим ядром. Не рекомендуется использовать эту функцию в своем коде.

No Hooks.

Return

Array. An associative array containing all the entries of array1 which have keys that are present in all arguments.

Usage

_rest_array_intersect_key_recursive( $array1, $array2 );
$array1(array) (required)
The array with master keys to check.
$array2(array) (required)
An array to compare keys against.

Changelog

Since 5.3.0 Introduced.

_rest_array_intersect_key_recursive() code WP 6.4.1

wp-includes/rest-api.php 
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;
}