[請益] 在While row內的多次搜尋
$sql="SELECT * FROM `product` WHERE `logo`='$logo' ORDER BY price";
$result = mysql_query($sql,$link);
while($row=mysql_fetch_assoc($result))
{
$sql2 = "SELECT * FROM `message` WHERE `p_id`=".$row["p_id"]."";
$result2 = mysql_query($sql2,$link);
$count= mysql_num_rows($result2);
.
.
.
在第一次query之後，while會帶著 $row["p_id"] 跑每一筆資料的p_id，
利用這個回傳值，再做一次query查messages這table內相關的資料數量，但只有
第一筆成功回傳數值，接下來的都出現
mysql_num_rows(): supplied argument is not a valid MySQL result resource in
這行如果有寫die(XXX)
$result2 = mysql_query($sql2,$link) or die(XXX);
就在這行停掉
也曾試過在while最下面寫mysql_free_result( $result2 )；
還是沒用
問題在哪裡呢? <(_ _)>跪求
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