【发布时间】：2014-09-11 05:27:13
【问题描述】：
这是我的表单，因为它在选择不同的单选按钮时将电子邮件发送到四个不同的电子邮件.....但是我不希望在验证验证码之前提交表单......所以我添加了这个验证码但是它不工作，我不知道为什么。请帮助我......提前谢谢。
<?php
session_start();
//error_reporting(E_ERROR | E_PARSE);
//echo "<pre>";
//print_r($_REQUEST);
if(!empty($_POST['answer']) )
{
//echo "You entered " . htmlentities($_POST['answer']) . " which is ";
if ($_SESSION['answer'] == $_POST['answer'])
{
//echo 'correct';
$validatedCaptcha = true;
}
else
{
echo '<center>'.'You Filled wrong Captcha. We expected ' . $_SESSION['answer'].' .Kindly Fill the Form Again'.'</center>';
$validatedCaptcha = false;
}
}
$digit1 = mt_rand(1, 20);
$digit2 = mt_rand(1, 20);
if (mt_rand(0, 1) === 1) {
$math = "$digit1 + $digit2";
$_SESSION['answer'] = $digit1 + $digit2;
} else {
if($digit1 >= $digit2)
{
$math = "$digit1 - $digit2";
$_SESSION['answer'] = $digit1 - $digit2;
}
else if($digit1 < $digit2)
{
$math = "$digit2 - $digit1";
$_SESSION['answer'] = $digit2 - $digit1;
}
}
//echo "<pre>";
//print_r($_SESSION);
?>
<center>
<?php
$name = $_REQUEST['name11'];
$email = $_REQUEST['email11'];
$phone12 = $_REQUEST['mobile11'];
$subject = $_REQUEST['subject11'];
$message1 = $_REQUEST['message11'];
$zone1 = $_REQUEST['zone1'];
$null_virdi = "-f " . $email;
if (isset($_REQUEST['submit']) && $validatedCaptcha == true ) {
$message = "Name: " . $name . "\n" . "Email: " . $email . "\n" . "phone :" . $phone12 . "\n" . "Message :" . $message1;
if ($_REQUEST['zone1'] == "South") {
echo "Thank you for Contacting our South Indian Zonal Office";
mail("abc@gmail.com", $subject, $message, null, $null_virdi);
}
if ($_REQUEST['zone1'] == "Delhi") {
mail("abc@gmail.com", $subject, $message, null, $null_virdi);
echo "Thank you for Contacting our Delhi Office";
}
if ($_REQUEST['zone1'] == "Hyderabad") {
mail("abc3@gmail.com", $subject, $message, null, $null_virdi);
echo "Thank you for Contacting our Hyderabad & AP Office";
}
if ($_REQUEST['zone1'] == "Pune") {
mail("abc4@gmail.com", $subject, $message, null, $null_virdi);
echo "Thank you for Contacting our Pune/Nasik Office";
}
if ($_REQUEST['zone1'] == "west") {
mail("abc5@gmail.com", $subject, $message, null, $null_virdi);
echo "Thank you for Contacting our West Zone Office";
}
}
?>
<html><head>
<script>
function validateForm()
{
var x = document.forms["myForm"]["email1"].value;
var atpos = x.indexOf("@");
var dotpos = x.lastIndexOf(".");
if (atpos < 1 || dotpos < atpos + 2 || dotpos + 2 >= x.length)
{
alert("Not a valid e-mail address");
return false;
}
}
</script>
</head><body>
<div style="width:50%;border: 4px double #dbd395;margin: 0;padding: 28px 0px 0px 34px;background-color: #F8F8F8">
<form name="myForm" action="" onSubmit="return validateForm();" method="post" >
<table >
<tr>
<h3 style="margin-left:5px;">Enquiry for Quotation</h3>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td>Name <font color="#FF0000">*</font> : <input type="text" required="required" name="name11" size="40"/></td>
</tr>
<td></td>
</tr>
<tr>
<td>Email <font color="#FF0000">*</font> : <input type="text" required="required" name="email11" size="40"/></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td>Mobile <font color="#FF0000">*</font> : <input type="text" required="required" name="mobile11" size="40"/></td>
</tr>
<tr>
<td>Zone <font color="#FF0000">*</font> : <input type="radio" required="required" name="zone1" value="South"/>South India <input type="radio" name="zone1" value="Delhi" />Delhi NCR <input type="radio" name="zone1" value="Hyderabad"/>Hyderabad & AP <br> <input type="radio" name="zone1" value="Pune"/>Pune/Nashik <input type="radio" name="zone1" value="west"/>Other </td>
</tr>
<td></td>
</tr>
<tr>
<td>Subject <font color="#FF0000">*</font> : <input type="text" required="required" name="subject11" size="40"/></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td style="vertical-align: top;"><font style=vertical-align:top; color="#000000">Message</font><font style=vertical-align:top; color="#FF0000">* :</font> <textarea rows="4" cols="32" name="message11" required="required"/></textarea></td>
</tr>
<tr><td><center><b>Captcha</b></center></td></tr>
<tr><td align="center">What's <?php echo $math; ?> = <input size="5" name="answer" type="text" /><br /></td></tr>
<tr>
<td align="center">
<input type="submit" name="submit" value="Send Message"/></td>
</tr>
</table>
</form>
</div>
<body/>
</html>
</center>
【问题讨论】：
-
表单中的验证码在哪里？您在提交之前所做的唯一验证是在电子邮件中。
-
这是一个数学验证码，如 sum 必须在输入中求解，然后它会回显提交的总和是否正确......什么是 = 它是由会话生成的......你能推荐什么......
-
您在服务器上检查验证码，而不是在客户端上。那么如何防止提交呢？
-
那我该怎么办？
-
不推荐，验证码的全部意义在于阻止机器人。如果验证码是通过 ajax 发送的，那么机器人可以通过查看代码轻松知道它是什么。
标签： php forms validation