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我創建了這段代碼作爲練習練習的一部分，但它不能按預期工作，我將問題指向PHP代碼，失去了我通過文本框輸入的值該計劃的重點是最後使用文本框中的數值和常量爲實際價格生成報價）然後它會正確輸出，但由於它已經丟失了所有值，所以我得到的是'總價格= 0'當我點擊提交時，PHP代碼丟失了它的值
任何人有任何想法？ （任何意見都沒有僅僅進行錯誤校驗） 我已經包含了我在下面的鏈接完整的代碼，以避免引擎收錄錯誤
代碼：
<!DOCTYPE HTML>
<html>
<head>Validation example
</head>
<body>
<?php
//?
$nameErr = $CustomeremailErr = $MonitorqtyErr = $PCqtyErr = $MiceqtyErr = $KeyboardqtyErr = $SpeakerqtyErr = "";
$PCqty = $Miceqty = $Keyboardqty = $Monitorqty = $Speakerqty = 0;
$name = $Customeremail = "";
DEFINE ("PCPRICE" , 300.01);
DEFINE ("MONITORPRICE" , 100);
DEFINE ("KEYBOARDPRICE" , 5);
DEFINE ("MICEPRICE" , 5);
DEFINE ("SPEAKERPRICE" , 20);
DEFINE ("DODGYDELIVERY", 35.05);
//?
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["name"])) {
$nameErr = "Name is required";
} else {
$name = clean_input($_POST["name"]);
if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
$nameErr = "Only letters and white space allowed";
}
}
if (empty($_POST["customeremail"])) {
$customeremailErr = "Email is required";
} else {
$Customeremail = clean_input($_POST["customeremail"]);
//check if email is well-formed
if (!filter_var($Customeremail, FILTER_VALIDATE_EMAIL)) {
$CustomeremailErr = "Invalid email format";
}
}
if (empty($_POST["PCqty"])) {
$PCqty = clean_input($_POST["PCqty"]);
} else if (preg_match("/^[a-zA-Z ]*$/",$PCqty)) {
$PCqtyErr = "Only Numbers Allowed";
}
if (empty($_POST["Monitorqty"])) {
$Monitorqty = clean_input($_POST["Monitorqty"]);
} else if (preg_match("/^[a-zA-Z ]*$/",$Monitorqty)) {
$MonitorqtyErr = "Only Numbers Allowed";
}
if (empty($_POST["Keyboardqty"])) {
$Keyboardqty = clean_input($_POST["Keyboardqty"]);
} else if (preg_match("/^[a-zA-Z ]*$/",$Keyboardqty)) {
$KeyboardqtyErr = "Only Numbers Allowed";
}
if (empty($_POST["Miceqty"])) {
$Miceqty = clean_input($_POST["Miceqty"]);
} else if (preg_match("/^[a-zA-Z ]*$/",$Miceqty)) {
$MiceqtyErr = "Only Numbers Allowed";
}
//?Fix change to speaker
if (empty($_POST["Speakerqty"])) {
$Speakerqty = clean_input($_POST["Speakerqty"]);
} else if (preg_match("/^[a-zA-Z ]*$/",$Speakerqty)) {
$SpeakerqtyErr = "Only Numbers Allowed";
}
}
// function test_input cleans up data by trimming off blank space, removing slashes and
//coding characters like < to < to prevent hacking
function clean_input ($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<h2>PHP Form Validation Example</h2>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Name: <input type="text" name="name" value="<?php echo $name;?>">
<span class="error">*<?php echo $nameErr;?></span>
<br><br>
email: <input type="text" name = "customeremail" value="<?php echo $Customeremail;?>">
<span class="error">*<?php echo $CustomeremailErr;?></span>
<br><br>
PC quantity: <input type="text" name="PCqty" value="<?php echo $PCqty;?>">
<span class="error">*<?php echo $PCqtyErr;?></span>
<br><br>
Keyboard quantity: <input type="text" name="Keyboardqty" value="<?php echo $Keyboardqty;?>">
<span class="error">*<?php echo $KeyboardqtyErr;?></span>
<br><br>
Mice Quantity: <input type="text" name="Miceqty" value="<?php echo $Miceqty;?>">
<span class="error">*<?php echo $MiceqtyErr;?></span>
<br><br>
Speaker Quantity: <input type="text" name="Speakerqty" value="<?php echo $Speakerqty;?>">
<span class="error">*<?php echo $SpeakerqtyErr;?></span>
<br><br>
Monitor Quantity: <input type="text" name="Monitorqty" value="<?php echo $Monitorqty;?>">
<span class="error">*<?php echo $MonitorqtyErr;?></span>
<br><br>
<input type="submit" name="submit" value="Submit">
</form>
<?php
$PcTotalCost = $SpeakerTotalCost = $MonitorTotalCost = $MiceTotalCost = $KeyboardTotalCost = 0 ;
// Has this form been submitted and was data entered then do the calculations
if ($_SERVER["REQUEST_METHOD"] == "POST") {
// check there are no errors in the entries
if (($nameErr == "") && ($CustomeremailErr == "") && ($PCqtyErr == "") && ($MonitorqtyErr == "") && ($MiceqtyErr == "") && ($KeyboardqtyErr == "") && ($SpeakerqtyErr == ""))
{
echo "<h2>Quote</h2>";
// Do required calculation
$PcTotalCost = $PCqty * PCPRICE;
$KeyboardTotalCost = $Keyboardqty * KEYBOARDPRICE;
$MonitorTotalCost = $Monitorqty * MONITORPRICE;
$SpeakerTotalCost = $Speakerqty * SPEAKERPRICE;
$MiceTotalCost = $Miceqty * MICEPRICE;
$GoodsTotalCost = $MiceTotalCost + $SpeakerTotalCost + $MonitorTotalCost + $KeyboardTotalCost + $PcTotalCost;
$VatRate = $GoodsTotalCost/100;
$GrossCost = $GoodsTotalCost + $VatRate + DODGYDELIVERY;
// Displaying the result
echo 'Dodgy Dan’s quote for ' . $name . ' on ' . date(1) . "<br/>" ;
echo $PCqty . " PC's at a cost of £ ". number_format(PCPRICE, 2) . " each would cost £ " . number_format($PcTotalCost, 2) . "<br/>";
echo $Keyboardqty . " Keyboards at a cost of £ ". number_format(KEYBOARDPRICE, 2) . " each would cost £ " . number_format($KeyboardTotalCost, 2) . "<br/>";
echo $Miceqty . " Mice at a cost of £ ". number_format(MICEPRICE, 2) . " each would cost £ " . number_format($MiceTotalCost, 2) . "<br/>";
echo $Speakerqty . " Speakers at a cost of £ ". number_format(SPEAKERPRICE, 2) . " each would cost £ " . number_format($SpeakerTotalCost, 2) . "<br/>";
echo $Monitorqty . " Monitors at a cost of £ ". number_format(MONITORPRICE, 2) . " each would cost £ " . number_format($MonitorTotalCost, 2) . "<br/>";
echo " The Delivery charge would be £" . number_format (DODGYDELIVERY, 2) . "<br/>" ;
echo ' The total cost of goods is £' . $GoodsTotalCost . "<br/>" ;
echo " The VAT(10%)rate for this purchase is £" . $VatRate . "<br/>" ;
echo ' The total gross cost after VAT for this order is £' . $GrossCost . "<br/>" ;
}
}
?>
</body>
</html>
此一件事'！['無效<！DOCTYPE HTML！>;取下支架和這是什麼'