我创建了一个表单，使用以下代码从url中提取变量:
<?php $id = $_GET['id']; echo $id; ?>
以这个链接为例(http://www.mydomain.co.uk/customerform.php?id=12)，它将在网页上显示12。
我想知道的是，如果URL中没有变量，是否可以阻止网页加载，例如?id=12 ?
无论是在php, javascript?
所以如果你访问了下面的链接，网页会显示:
http://www.mydomain.co.uk/customerform.php?id=12，如果您访问了这个链接(没有变量)，页面将不会显示:
http://www.mydomain.co.uk/customerform.php谢谢你的帮助。
更新下面…
我已经添加了Krishnanunni的代码，它成功地阻止了网页显示，如果在url中没有变量。但是添加这段代码会阻止表单提交…
是否有一种方法保持url变量时，提交的形式?
有人能帮忙吗?由于
<body id="main_body" >
<div id="form_container">
<?
/* only load page is variable is presnt in the URL */
if (!isset($_GET['id']) || empty($_GET['id']))
{
die("Bad Request");
}
?>
<?
/* Mailer with Attachments */
$action = $_REQUEST['action'];
global $action;
function showForm() {
?>
<form id="contact" class="appnitro" name="idform" enctype="multipart/form-data" method="post" action="<?=$_SERVER['PHP_SELF']?>">
<input type="hidden" name="action" value="send" />
<input type="hidden" name="MAX_FILE_SIZE" value="10000000"/>
<input name="to_email" type="hidden" id="to_email" value="myemail@domain.co.uk"/>
<div>
<input id="invoice" name="invoice" class="element text medium" type="hidden" maxlength="255" value="<?php $id = $_GET['id']; echo $id; ?>"/>
</div>
<div>
<input id="subject" name="subject" class="element text medium" type="hidden" maxlength="255" value="Enquiry Form - (Invoice: <?php $id = $_GET['id']; echo $id; ?>)"/>
</div>
<label class="description" for="from_name">Name </label>
<div>
<input id="from_name" name="from_name" class="element text medium" type="text" maxlength="255" value=""/>
</div>
<label class="description" for="position">Position </label>
<div>
<input id="position" name="position" class="element text medium" type="text" maxlength="255" value=""/>
</div>
<label class="description" for="uemail"> Email </label>
<div>
<input id="email" name="email" class="element text medium" type="text" maxlength="255" value=""/>
</div>
<label class="description" for="phone"> Phone </label>
<div>
<input id="phone" name="phone" class="element text medium" type="text" maxlength="255" value=""/>
</div>
<input name="Reset" type="reset" class="contactform_small" value="Reset" />
<input name="Submit2" type="submit" class="contactform_small" id="Submit" value="Submit" />
</form>
<?
}
function sendMail() {
if (!isset ($_POST['to_email'])) { //Oops, forgot your email addy!
die ("<p>Oops! You forgot to fill out the email address! Click on the back arrow to go back</p>");
}
else {
$to_name = "MY BUSINESS";
$from_name = stripslashes($_POST['from_name']);
$subject = Trim(stripslashes($_POST['subject']));
$to_email = $_POST['to_email'];
$EmailFrom = Trim(stripslashes($_POST['email']));
// get posted data into local variables
$position = Trim(stripslashes($_POST['position']));
$position2 = Trim(stripslashes($_POST['position2']));
$phone = Trim(stripslashes($_POST['phone']));
$invoice = Trim(stripslashes($_POST['invoice']));
//Let's start our headers
$headers = "From: $EmailFrom<" . $_POST['email'] . ">n";
$headers .= "Reply-To: <" . $_POST['email'] . ">n";
$headers .= "MIME-Version: 1.0n";
$headers .= "Content-Type: multipart/related; type="multipart/alternative"; boundary="----=MIME_BOUNDRY_main_message"n";
$headers .= "X-Sender: $from_name<" . $_POST['email'] . ">n";
$headers .= "X-Mailer: PHP4n";
$headers .= "X-Priority: 3n"; //1 = Urgent, 3 = Normal
$headers .= "Return-Path: <" . $_POST['email'] . ">n";
$headers .= "This is a multi-part message in MIME format.n";
$headers .= "------=MIME_BOUNDRY_main_message n";
$headers .= "Content-Type: multipart/alternative; boundary="----=MIME_BOUNDRY_message_parts"n";
$message = "------=MIME_BOUNDRY_message_partsn";
$message .= "Content-Type: text/plain; charset="iso-8859-1"n";
$message .= "Content-Transfer-Encoding: quoted-printablen";
$message .= "n";
/* Add our message, in this case it's plain text. You could also add HTML by changing the Content-Type to text/html */
$message .= "Invoice: ";
$message .= $invoice;
$message .= "n";
$message .= "n";
$message .= "My Business Enquiry Form";
$message .= "n";
$message .= "n";
$message .= "Contact Details: ";
$message .= "n";
$message .= "n";
$message .= "Name: ";
$message .= $from_name;
$message .= "n";
$message .= "Position: ";
$message .= $position;
$message .= "n";
$message .= "Email: ";
$message .= $EmailFrom;
$message .= "n";
$message .= "Phone: ";
$message .= $phone;
$message .= "n";
$message .= "n";
// send the message
mail("$to_name<$to_email>", $subject, $message, $headers);
print "Form sent successfully";
}
}
?>
<?
switch ($action) {
case "send":
sendMail();
showForm();
break;
default:
showForm();
}
?>
<div id="footer">
</div>
</div>
</body>
用下面的代码启动php页面
if (!isset($_GET['id']) || empty($_GET['id']))
{
die("Bad Request");
}
这应该能解决你的问题