在這個網站上,我正在建設,人們可以保留一些平板電腦。 它首先檢查MySQL數據庫以查看有多少個平板電腦可用,因此不會再有可能保留的平板電腦。如果語句被忽略 - php MySQL
但是,在提交表單後,檢查最大ammount,顯示錯誤消息,但它們仍被添加到數據庫中。
示例:只有10個iOS平板電腦是免費的,用戶嘗試保留15.該網站顯示「太多的iOS平板電腦,只有10個可用」,但仍在數據庫中插入15個。
更新:它檢查多片如何在形式和檢查與數據庫中輸入的語句:
if($_POST['ios'] > $ios) {echo "<span class=\"error\">Too much iOS tablet.. Max is " . $ios . "</span><br />";}
if($_POST['android'] > $android) {echo "<span class=\"error\">Too much Android tablets. Max is " . $android . "</span><br />";}
if($_POST['windows'] > $windows) {echo "<span class=\"error\">Too much Windows tablets. Max is " . $windows . "</span><br />";}
所有其他錯誤信息的工作是正確的。
代碼:
<?
//check reservations on date
$sql = "SELECT SUM(ios) as iostotal,SUM(android) as androidtotal,SUM(windows) as windowstotal FROM reservaties WHERE '$datum' = datum";
$check = mysqli_query($link,$sql) or die(mysql_error());
while ($free = mysqli_fetch_array($check)) {
$ios = 15 - $free['iostotal'];
$android = 15 - $free['androidtotal'];
$windows = 15 - $free['windowstotal'];
}
?>
<?php
if(isset($_POST['submit'])) {
if($_POST['ios'] == null) {$resios = 0;} else {$resios = $_POST['ios'];}
if($_POST['android'] == null) {$resand = 0;} else {$resand = $_POST['android'];}
if($_POST['windows'] == null) {$reswin = 0;} else {$reswin = $_POST['windows'];}
//Check for errors
if($_POST['naam'] == null) {echo "<span class=\"error\">Gelieve een naam in te vullen</span><br />";}
if($_POST['opleiding'] == 0) {echo "<span class=\"error\">Selecteer een opleiding</span><br />";}
//PROBLEM STARTS HERE
if($_POST['ios'] > $ios) {echo "<span class=\"error\">Aantal iOS tablets overschreden. Maximum " . $ios . " tablets beschikbaar.</span><br />";}
if($_POST['android'] > $android) {echo "<span class=\"error\">Aantal Android tablets overschreden. Maximum " . $android . " tablets beschikbaar.</span><br />";}
if($_POST['windows'] > $windows) {echo "<span class=\"error\">Aantal Windows tablets overschreden. Maximum " . $windows . " tablets beschikbaar.</span><br />";}
//PROBLEM STOPS HERE
if($_POST['terms'] != 'on') {echo "<span class=\"error\">Reglement moet aanvaard worden.</span><br />";}
if($resios == 0 && $resand == 0 && $reswin == 0) {echo "<span class=\"error\">Er moet minstens 1 tablet gereserveerd worden</span>";}
else {
$query = "INSERT INTO reservaties(oplid,naam,datum,ios,android,windows) VALUES ('" . $_POST['opleiding'] . "','" . $_POST['naam'] . "','" . $datum . "','" . $resios . "','" . $resand . "', '" . $reswin . "')";
if(mysqli_query($link,$query)) {
echo "<p class=\"succes\">U hebt succesvol " . $resios . " iOS-tablets, " . $resand . " Android-tablets en " . $reswin . " Windows-tablets gereserveerd op " . $datum . "</p>";
}
else {
echo "<p class=\"error\">Er is een fout opgetreden. Probeer opnieuw, of neem contact op met de <a href=\"mailto:[email protected]\">Mediatheek</a>.</p>";}
}
}
?>
你有百萬IF在你的代碼中哪一個被忽略?或者我們自己檢測到它? –
,你說'錯誤消息顯示'爲什麼不發佈錯誤信息呢? –
如果它是用英文寫成的,我會幫助你,但必須弄清楚你的代碼出了什麼問題,同時必須閱讀任何解釋它的語言,這是一個不錯的選擇。我也沒有看到IF來檢查天氣或者沒有想要的產品數量。 – Prix