通过PHP验证简单的RSVP表单

Question

我正在尝试只使用PHP来验证我的RSVP表单。当表单不完整时，用户应收到一条错误消息。我正在努力避免使用jQuery。

我正在使用这个教程：http://premium.wpmudev.org/blog/how-to-build-your-own-wordpress-contact-form-and-why/

表单运行正常，但我根本无法显示错误消息。我正在使用Wordpress，我希望表单出现在每一页的页脚；不确定这是否会使事情变得复杂。下面是我的代码：

<?php

$response = ""; 

//function to generate response
function my_contact_form_generate_response($type, $message) {

    global $response;

    if ($type == "success") {
        $response = "<div class='success'>{$message}</div>";
    } else { 
        $response = "<div class='error'>{$message}</div>";
    }
}


//response messages
$missing_content = "Please supply all information.";
$email_invalid   = "Email Address Invalid.";
$message_unsent  = "Message was not sent. Try Again.";
$message_sent    = "Thanks! Your message has been sent.";

//variables defined for messages 
$email = $_POST["rsvp_email"]; 
$name = $_POST["rsvp_name"];
$attend = $_POST["rsvp_attend"];
$number = $_POST["rsvp_number"];

//variables defined for message to admin
$to = get_option('admin_email'); //sending to wordpress admin email
$subject = "Just Kidding You Foo"; 
$headers = "From: $email\n";
$message = "$name $attend.\n RSVPs $number of people";

//conditional statements used for form validation

//validate email
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    my_contact_form_generate_response("error", $email_invalid);
} else { //email is valid

    //validate presence of name and message
    if(empty($name) || empty($attend) || empty($number)) {
        my_contact_form_generate_response("error", $missing_content);
    } else { //ready to go!
        $sent = wp_mail($to,$subject,$message,$headers);
        if($sent) {
            my_contact_form_generate_response("success", $message_sent); //message sent!
        } else {
            my_contact_form_generate_response("error", $message_unsent); //message wasn't sent
        }
    }
}

?>


<div id="page-rsvp">        

    <h1>RSVP</h1>

    <div id="respond">

    <?php echo $response; ?>

    <form action="<?php the_permalink(); ?>" method="post">               

        <!--Name here-->
        <div class="rsvp-full"><label for="rsvp_name"><input type="text" name="rsvp_name" value="Your name"></label></div>
        <div class="rsvp-full"><label for="rsvp_email"><input type="text" name="rsvp_email" value="Your email"></label></div>

        <!--status of attendance-->
        <div class="rsvp-full">
        <div class="rsvp-element"><input id="radio-button" type="radio" name="rsvp_attend" value="accepts">Accepts</div>
        <div class="rsvp-element"><input id="radio-button" type="radio" name="rsvp_attend" value="declines">Declines</div>
        </div>    

        <!--number of guests attending-->                    
        <div class="rsvp-full"><input type="number" name="rsvp_number" min="1" max="5">Total number of guests attending</div>    

         <div id="submit-button" class="rsvp-full"><input id="submit-button" type="submit"></div>

    </form> 

    </div>  


</div>

蒂娅！

Answer 1

我不太熟悉可湿性粉剂，但如果我理解正确的话，我相信你是在努力确保所有的字段都填好了。

检查您的括号！您需要确保您的花括号在您想要的位置打开和关闭。否则，页面的输出将不会显示。我写了所有的花括号，因为我不够聪明，不能确定它们在哪里开始和结束。我擅自对你的问题进行了编辑。我相信最后少了一个。

一旦我修复了支架，移除了电脑没有的功能，它就工作得很好。

提示0:尝试打开此脚本顶部的错误报告- error_reporting(E_ALL);。我一直在为开发做准备。

提示1:使用placeholder属性而不是value来表示“您的名字”。

提示2:确保设置了$_POST变量。为此，我会检查它们是否已设置，如果未设置，则将它们设置为''；如下所示：

//variables defined for messages 
// you could do it like this:
if (isset($_POST["rsvp_email"])) {
    $email =  $_POST["rsvp_email"]; 
} else {
    $email = '';
}

// or like this:
$name = '';
if (isset($_POST["rsvp_name"])) {
    $name = $_POST["rsvp_name"];
}

// or even using a ternary operator:
$attend = isset($_POST["rsvp_attend"]) ? $_POST["rsvp_attend"] : '';

//but this will trigger a "Notice" error if the post var isn't set.
$number = $_POST["rsvp_number"];