这是我的表单，因为它在选择不同的单选按钮时向四个不同的电子邮件发送电子邮件。。。。。但我不希望在验证验证码之前提交表格。。所以我添加了这个captcha，但它不起作用，我不知道为什么。请帮我一下。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 $math; ?> = <input size="5" name="answerswer" type="text" /><br /></td></tr>
<tr>
<td align="center">
<input type="submit" name="submit" value="Send Message"/></td>
</tr>
</table>
</form>
</div>
<body/>
</html>
</center>
只需创建一个设置为false的$error变量。如果captcha是错误的，那么将其设置为true。
仅处理表单if $error == false
如果你想在提交表单之前验证captcha（不确定为什么），你需要使用ajax来调用php脚本来验证它。