【发布时间】：2014-01-21 14:58:21
【问题描述】：
我尝试根据this tutorial创建一个简单的联系表格
为避免垃圾邮件攻击，我尝试将该联系表与 really simple captcha plugin. 结合使用
使用以下代码，我可以在我的任何页面中使用简码 [contact]，并且表单正在显示，但是在检查验证码时出现问题。
这是插件的代码：
function wptuts_get_the_ip() {
if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])) {
return $_SERVER["HTTP_X_FORWARDED_FOR"];
}
elseif (isset($_SERVER["HTTP_CLIENT_IP"])) {
return $_SERVER["HTTP_CLIENT_IP"];
}
else {
return $_SERVER["REMOTE_ADDR"];
}
}
// short code function
function wptuts_contact_form_sc( $atts ) {
add_shortcode( 'contact', 'contact_form_shortcode' );
extract(shortcode_atts(array(
"email" => get_bloginfo('admin_email'),
"subject" => '',
"label_name" => 'Your Name',
"label_email" => 'Your E-mail Address',
"label_subject" => 'Your Answer',
"label_captcha" => 'Captcha',
"label_submit" => 'Submit',
"error_empty" => 'Please fill in all the required fields.',
"error_noemail" => 'Please enter a valid e-mail address.',
"success" => 'Thanks for your e-mail! We\'ll get back to you as soon as we can.'
), $atts));
$captcha_instance = new ReallySimpleCaptcha(); //imports really simple captcha plugin
$word = $captcha_instance->generate_random_word();
$prefix = mt_rand();
$image= $captcha_instance->generate_image( $prefix, $word );
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$error = false;
$required_fields = array("your_name", "email", "captcha", "subject");
foreach ($_POST as $field => $value) {
if (get_magic_quotes_gpc()) {
$value = stripslashes($value);
}
$form_data[$field] = strip_tags($value);
}
foreach ($required_fields as $required_field) {
$value = trim($form_data[$required_field]);
if(empty($value)) {
$error = true;
$result = $error_empty;
}
}
if(!is_email($form_data['email'])) {
$error = true;
$result = $error_noemail;
}
if ($error == false) {
$captcha_text=$form_data['captcha'];
$correct = $captcha_instance->check( $prefix, $captcha_text );
if($correct==TRUE){
$email_subject = "[" . get_bloginfo('name') . "] " . $form_data['subject'];
$email_message = $form_data['captcha'] . "\n\nIP: " . wptuts_get_the_ip();
$headers = "From: ".$form_data['your_name']." <".$form_data['email'].">\n";
$headers .= "Content-Type: text/plain; charset=UTF-8\n";
$headers .= "Content-Transfer-Encoding: 8bit\n";
wp_mail($email, $email_subject, $email_message, $headers);
$result = $success;
$sent = true;
}
}
}
if($result != "") {
$info = '<div class="info">'.$result.'</div>';
}
$email_form = '<form class="contact-form" method="post" action="'.get_permalink().'">
<div>
<label for="cf_name">'.$label_name.':</label>
<input type="text" name="your_name" id="cf_name" size="50" maxlength="50" value="'.$form_data['your_name'].'" />
</div>
<div>
<label for="cf_email">'.$label_email.':</label>
<input type="text" name="email" id="cf_email" size="50" maxlength="50" value="'.$form_data['email'].'" />
</div>
<div>
<label for="cf_subject">'.$label_subject.':</label>
<input type="text" name="subject" id="cf_subject" size="50" maxlength="50" value="'.$subject.$form_data['subject'].'" />
</div>
<div>
<label for="cf_message">'.$label_captcha.':</label>
<input type="text" name="captcha" id="cf_message" size="50" maxlength="50" value=""/>
</div>
<div id="captcha"><span id="captcha_text">Captcha:</span><img id="captcha_image" src="'.plugins_url("really-simple-captcha/tmp/" . $image) . '" alt="" /></div>
<div>
<input type="submit" value="'.$label_submit.'" name="send" id="cf_send" />
</div>
</form>';
if($sent == true) {
return $info;
} else {
return $info.$email_form;
}
}
add_shortcode('contact', 'wptuts_contact_form_sc');
// add plugins style to frontend
function prize_game_contact_form() {
wp_register_style('prize_game_contact_form', plugins_url('css/style.css',__FILE__));
wp_enqueue_style('prize_game_contact_form');
}
add_action('wp_enqueue_scripts', 'prize_game_contact_form');
到目前为止，我没有添加 $captcha_instance->remove( $prefix );，因为它不能正常工作。似乎每次我单击提交按钮时都会创建一个新词，并且函数$captcha_instance->check() 检查新词是否等于输入字段中的验证码文本，但这些词当然不匹配，因为它已经是一个新词.我不明白为什么单击提交按钮时会创建一个新单词。哪里出错了？
【问题讨论】：
标签： wordpress forms plugins captcha