見了鬼了, $_request的有關問題

見了鬼了, $_request的問題.
$counter =0;
$temp = 0;
while(!is_null ($_REQUEST[ 'thisAnswer_id '. ++$counter]));
{
++$temp;
echo "~~ temp is ".$temp. "~~ ";
echo "~~ Counter is " .$counter. "~~ ";
$thisAnswer_id = array($counter => $_REQUEST[ 'thisAnswer_id '.$counter]);
?>
輸出結果是:
~~~ temp is 1 ~~~
~~~ counter is 3 ~~~
而且迴圈僅僅執行一次, 其實前面會傳過來好幾個值呢.
做這個的目的是想讓前一頁傳過來的許多個屬性相同的值用迴圈的方法接收並且存入數組中.
請高人給看看這是怎麼回事啊, 謝謝

------解決方案--------------------
while(!is_null ($_REQUEST[ 'thisAnswer_id '. ++$counter]));

這行後面的 "; "號去掉....

後面還差個 } 號.

