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我不是一个PHP程序员，但用它触摸，足以把一个接触的形式。不过，我想添加一个验证码字段，现在的作品，但形式不验证它 - 所以它提出无论什么PHP，试图验证码添加到现有的形式
任何人可以帮助吗？如果代码是不好意思乱，在此先感谢
的，如果我的网页
<?php session_start() ?>
<?php
//If the form is submitted
if(isset($_POST['submit'])) {
//Check to make sure that the name field is not empty
if(trim($_POST['name']) == '') {
$hasError = true;
} else {
$name = trim($_POST['name']);
}
//Check to make sure that the subject field is not empty
if(trim($_POST['subject']) == '') {
$hasError = true;
} else {
$subject = trim($_POST['subject']);
}
//Check to make sure sure that a valid email address is submitted
if(trim($_POST['email']) == '') {
$hasError = true;
} else if (!eregi("^[A-Z0-9._%-][email protected][A-Z0-9._%-]+\.[A-Z]{2,4}$", trim($_POST['email'])))
{
$hasError = true;
} else {
$email = trim($_POST['email']);
}
//Check to make sure comments were entered
if(trim($_POST['message']) == '') {
$hasError = true;
} else {
if(function_exists('stripslashes')) {
$message = stripslashes(trim($_POST['message']));
} else {
$message = trim($_POST['message']);
}
/*captcha 2*/
if(isset($_POST["captcha"])) {
$hasError = true;
} else {
if($_SESSION["captcha"]==$_POST["captcha"]) {
}
}
//CAPTHCA is valid; proceed the message: save to database, send by e-mail ...
//If there is no error, send the email
if(!isset($hasError)) {
$emailTo = 'email address'; //Put your own email address here
$emailTo = 'email address'; //Put your own email address here
$body = "Name: $name \n\nEmail: $email \n\nSubject: $subject \n\nMessage:\n $message";
$headers = 'From: website form <'.$emailTo.'>' . "\r\n" . 'Reply-To: ' .
$email;
mail($emailTo, $subject, $body, $headers);
$emailSent = true;
}
}
?>
Code in the form:
[php]<?php if(isset($hasError)) { //If errors are found ?>
<p class="error">Please check if you've filled all the fields with valid information. Thank you.</p>
<?php } ?>
<?php if(isset($emailSent) && $emailSent == true) { //If email is sent ?>
<p><strong>Email Successfully Sent!</strong></p>
<p>Thank you <strong><?php echo $name;?></strong> for contacting us. Your email was successfully sent and we will be in touch with you soon.</p>
<?php } ?>
<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>" id="contactform">
<div>
<p>
<label for="name">Name</label><br />
<input type="text" name="name" value="" id="name" class="required">
</p>
</div>
<div>
<p>
<label for="email">Email</label><br />
<input type="text" name="email" value="" id="email" class="required">
</p>
</div>
<div>
<p>
<label for="subject">Subject</label><br />
<input type="text" name="subject" value="" id="subject" class="required">
</p>
</div>
<div style="margin-bottom:25px;">
<p>
<label for="message">Message</label><br />
<textarea rows="5" name="message" value="" id="message" class="required"></textarea>
</p>
</div>
<div style="margin-bottom:25px;">
<img src="captcha.php" alt="captcha image">
<p>
<label for="captcha">(antispam code, 3 black symbols)</label><br />
<input type="text" name="captcha" maxlength="3" id="captcha" class="required">
</p>
</div>
<input type="submit" value="Send Message" name="submit" />
</form>
[/php]
请问您的文件有调用session_start（）？没有它，$ _SESSION ['catpcha']将是空的（并且可能会发出通知）。此外，请注意，您应该检查存储的验证码值是否不为空。否则，用户可以简单地通过不加载图像来通过验证码。 if（！empty（$ _ SESSION ['captcha']）&& $ _SESSION ['captcha'] === $ captchaFromUser）{valid} – Corbin 2011-12-20 19:56:03
检查会话存储的captcha值是否为空？这是我上面发布的代码。顺便说一句，$ captchaFromUser将是$ _POST ['captcha']。避免直接访问$ _POST值而不检查它们是否被首先设置通常会更好。如果他们没有设置，那么你会得到一个通知。 – Corbin 2011-12-20 20:02:30
对不起，我之前没有看过代码，所以我已经替换if（isset（$ _ POST [“captcha”]）） with if（！empty（$ _ SESSION ['captcha']）&& $ _SESSION ['captcha'] === $ captchaFromUser） – user1108564 2011-12-20 20:08:24