你好,我希望有人能幫助我。我需要知道如何編寫一個查詢,這將允許我根據燃料數量選擇添加一個值。根據選擇更新總價格mysql php
例如說,用戶選擇100升然後添加£5至總或者如果他們選擇500升然後添加£15等
下面是代碼我現在有用於計算每升價格。
// show price
$fuelPriceQuery = sprintf("SELECT `Price` FROM fuel_price WHERE FuelType = '%s' LIMIT 1",
mysql_real_escape_string($_POST['fueltype']));
$fuelPriceResult = mysql_query($fuelPriceQuery);
$price = mysql_fetch_array($fuelPriceResult, MYSQLI_ASSOC);
echo 'The Price Today is £'.($_POST['qtylitres'] * $price['Price']);
echo "<br />";
echo "For " . ($_POST['qtylitres']) . " Litres of " .($_POST['fueltype']);
echo "<br />" . "<br />";
if(mysql_num_rows(mysql_query("SELECT * FROM subscribe WHERE Email = '".mysql_real_escape_string($_POST['inputEmail'])."'")))
{
echo "Thanks but we already have your email";
}
else
{
我沒有看到你想要做什麼,代碼似乎是正確的。 – frisco
你能詳細解釋一下這個問題嗎? – dan