Remove duplicate items from an array [duplicate]

Answer 1

$res1       = mysql_query("SELECT * FROM `luggage` where r_bus_no='".$tour_id."' and `date1`='$date' AND `login_id`='".$_SESSION['login_id']."'");
}
/// create a array to store value
$city_arr   = array();
if(mysql_num_rows($res1)>0)
{
    while($row1 = mysql_fetch_array($res1))
    {

/// insert the value in array use the array_push function
            array_push($city_arr,$row1['r_to']);
    }

//// remove the duplicate entry in array use the array_unique function
    $a          = array_unique($city_arr);
    echo " -- Select City ---";
    foreach($a as $b)
    {
    ?>