一列MySQL结果到数组

I have MySQL query to column: SELECT column FROM table. Is there any possibility how I can save result of this query to array?

I have now this code:

    $dotazHlasy = mysql_query("SELECT `id_ulohy` FROM `mproud-hlasy` WHERE `id_uzivatele`=".$_SESSION['uzivatel']) or die(mysql_error()); 
  while($radek = mysql_fetch_row($dotazHlasy)){
    $hlasy[] = $radek;
  };

This return to me:

Array
(
    [0] => Array
        (
            [0] => 4
        )

    [1] => Array
        (
            [0] => 3
        )

)

I would like get this:

Array
    (
        [0] => 4

        [1] => 3

    )

Thank you for your advice.

The easiest way to put one column in array as the following code.

$YouArray = array();
$command = mysql_query("SELECT column FROM table");
while($result = mysql_fetch_array($command))
    $YouArray[] = $result['column'];