How to search by key=>value in a multidimensional array in PHP

Question

Is there any fast way to get all subarrays where a key value pair was found in a multidimensional array? I can\'t say how deep the array will be.

Simple example arra

Answer 1

If you want to search for array of keys this is good

function searchKeysInMultiDimensionalArray($array, $keys)
{
    $results = array();

    if (is_array($array)) {
        $resultArray = array_intersect_key($array, array_flip($keys));
        if (!empty($resultArray)) {
            $results[] = $resultArray;
        }

        foreach ($array as $subarray) {
            $results = array_merge($results, searchKeysInMultiDimensionalArray($subarray, $keys));
        }
    }

    return $results;
}

Keys will not overwrite because each set of key => values will be in separate array in resulting array.
If you don't want duplicate keys then use this one

function searchKeysInMultiDimensionalArray($array, $keys)
{
    $results = array();

    if (is_array($array)) {
        $resultArray = array_intersect_key($array, array_flip($keys));
        if (!empty($resultArray)) {
            foreach($resultArray as $key => $single) {

                $results[$key] = $single;
            }
        }

        foreach ($array as $subarray) {
            $results = array_merge($results, searchKeysInMultiDimensionalArray($subarray, $keys));
        }
    }

    return $results;
}