how to multiply the numbers inside for loop when is loop?

[Xiu]

Give me a hand please!!

The purpose of this code is to get the totall price, but I don't know how to multiply $orderAmount ,$menuPrice inside for loop. and I also get problem to echo the result only once.

for ($i=1; $i<=$numRowsMenuid;++$i){
$rowOrderInfo=mysql_fetch_assoc($resultOrderInfo);
$orderAmount=$rowOrderInfo['orderamount'];
 
$resultMenuInfo= mysql_query("SELECT * FROM menuinfo where id=$menuId");
while ($rowsMenuInfo=mysql_fetch_assoc($resultMenuInfo)){
$menuPrice=$rowsMenuInfo['menuprice'];
 
}
}

[pbmods]

Heya, Xiu. Welcome to TSDN!

Where do you define $menuid? It seems as though your script keeps running the exact same query every iteration.