PHP Function that returns an array of values of keys

I have an开发者_如何学编程 array like this...

Array
(
    [0] => Array
        (
            [id] => 10651            
            [userid] => 079eb9f4b9eb573f6aec93ce97ed1e7f
        )
    [1] => Array
        (
            [id] => 74315
            [userid] => 1283612836
        )
    [2] => Array
        (
            [id] => 74315
            [userid] => asydk12893489123
        )
)

is there a php function that returns me an array of values of the key userid if I make a call like this...

func($arr_name, $key_name);

Regards

---

No, but you can make one.

function getFromKey($array, $keyName) {
    $return = array();
    foreach ($array as $value) {
        if (isset($value[$keyName]))
            $return[] = $value[$keyName];
    }

    return $return;
}