PHP multidimensional array search by value

Question

I have an array where I want to search the uid and get the key of the array.

Examples

Assume we have the following 2-dimensional array:

<

Answer 1

I had to use un function which finds every elements in an array. So I modified the function done by Jakub Truneček as follow:

function search_in_array_r($needle, $array) {
    $found = array();
    foreach ($array as $key => $val) {
        if ($val[1] == $needle) {
            array_push($found, $val[1]);
        }
    }
    if (count($found) != 0)
        return $found;
    else
        return null;
}