javascript - 为什么提交表单后我的页面会刷新？

Question

问题

我会尝试在不使事情复杂化的情况下包含尽可能多的信息，但我有一个问题，当我提交表单时，页面会刷新，从而关闭带有表单的选项卡。然后，用户需要再次单击该选项卡才能查看反馈。

背景信息。

我有一个网页，使用 JavaScript 打开和关闭“选项卡”(div)，在其中一个选项卡上，我有一个表单，将用户输入的数据 POST 到 php 脚本，然后将数据发送到电子邮件地址，然后重定向回原始页面。但是，当脚本重定向回页面时，选项卡将关闭，从而使用户重新单击选项卡以再次打开它以查看脚本的自动反馈。

我检查过的内容

我已经检查过，这不是重定向导致刷新，因为当表单 POST 到自身时它仍然会发生。

The website in question

有人有什么想法吗？

这是表单的 HTML，位于查询“选项卡”中。

           <div class='content one'>
      <div id="contact-form" class="clearfix">
        <P>Quick And Easy!</P>
        <br/>
        <P>Fill out our super swanky contact form below to get in touch with us! Please provide as much information as possible for us to help you with your enquiry.</P>
        <br/>
        <?php
            //init variables
            $cf = array();
            $sr = false;

            if(isset($_SESSION['cf_returndata'])){
                $cf = $_SESSION['cf_returndata'];
                $sr = true;
            }
            ?>
        <ul id="errors" class="<?php echo ($sr && !$cf['form_ok']) ? 'visible' : ''; ?>">
          <li id="info">There were some problems with your form submission:</li>
          <?php 
                if(isset($cf['errors']) && count($cf['errors']) > 0) :
                    foreach($cf['errors'] as $error) :
                ?>
          <li><?php echo $error ?></li>
          <?php
                    endforeach;
                endif;
                ?>
        </ul>
        <p id="success" class="<?php echo ($sr && $cf['form_ok']) ? 'invisible' : ''; ?>">Now sit back and relax while we go to work on your behalf, we'll keep you updated with information on our results and if you have any questions then we welcome your calls or emails on 078675675446 or isaaclayne@southwestcarfinder.co.uk</p>
         <form method="POST" action="process.php">
          <label for="enquiry">Make: </label>
           <select id="make" name="make">
             <option value="Ford" <?php echo ($sr && !$cf['form_ok'] && $cf['posted_form_data']['make'] == 'Ford') ? "selected='selected'" : '' ?>>Ford</option>
             <option value="BMW" <?php echo ($sr && !$cf['form_ok'] && $cf['posted_form_data']['make'] == 'BMW') ? "selected='selected'" : '' ?>>BMW</option>
             <option value="Vauxhall" <?php echo ($sr && !$cf['form_ok'] && $cf['posted_form_data']['make'] == 'Vauxhall') ? "selected='selected'" : '' ?>>Vauxhall</option>
           </select>
           <label for="Model">Model: <span class="required">*</span></label>
           <input type="text" id="model" name="model" value="<?php echo ($sr && !$cf['form_ok']) ? $cf['posted_form_data']['model'] : '' ?>" placeholder="Model of Car" required autofocus />
           <label for="name">Name: <span class="required">*</span></label>
           <input type="text" id="name" name="name" value="<?php echo ($sr && !$cf['form_ok']) ? $cf['posted_form_data']['name'] : '' ?>" placeholder="John Doe" required autofocus />
           <label for="email">Email Address: <span class="required">*</span></label>
           <input type="email" id="email" name="email" value="<?php echo ($sr && !$cf['form_ok']) ? $cf['posted_form_data']['email'] : '' ?>" placeholder="johndoe@example.com" required />
           <label for="telephone">Telephone: </label>
           <input type="tel" id="telephone" name="telephone" value="<?php echo ($sr && !$cf['form_ok']) ? $cf['posted_form_data']['telephone'] : '' ?>" />
           <label for="Budget">Your Budget: </label>
           <select id="enquiry" name="enquiry">
             <option value="300 or less" <?php echo ($sr && !$cf['form_ok'] && $cf['posted_form_data']['enquiry'] == 'General') ? "selected='selected'" : '' ?>>£300 or less</option>
             <option value="400 or more" <?php echo ($sr && !$cf['form_ok'] && $cf['posted_form_data']['enquiry'] == 'Sales') ? "selected='selected'" : '' ?>>£400</option>
             <option value="500 or more" <?php echo ($sr && !$cf['form_ok'] && $cf['posted_form_data']['enquiry'] == 'Support') ? "selected='selected'" : '' ?>>£500 or more</option>
           </select>
           <label for="message">Additional Info: <span class="required">*</span></label>
           <textarea id="message" name="message" placeholder="Your message must be greater than 20 charcters" required data-minlength="20"><?php echo ($sr && !$cf['form_ok']) ? $cf['posted_form_data']['message'] : '' ?></textarea>
           <span id="loading"></span>
           <input type="submit" value="Find My Car!" id="submit-button" />
           <p id="req-field-desc"><span class="required">*</span> indicates a required field</p>
         </form>
         <?php unset($_SESSION['cf_returndata']); ?>
       </div>
       <script src="//ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script> 
       <script>!window.jQuery && document.write(unescape('%3Cscript src="js/libs/jquery-    1.5.1.min.js"%3E%3C/script%3E'))</script> 
       <script src="js/plugins.js"></script> 
       <script src="js/script.js"></script> 
       <!--[if lt IE 7 ]>
     <script src="js/libs/dd_belatedpng.js"></script>
     <script> DD_belatedPNG.fix('img, .png_bg');</script>

     <![endif]--> 
     </div>

PHP 脚本

<?php
if( isset($_POST) ){

    //form validation vars
    $formok = true;
    $errors = array();

    //sumbission data
    $ipaddress = $_SERVER['REMOTE_ADDR'];
    $date = date('d/m/Y');
    $time = date('H:i:s');

    //form data
    $make = $_POST['make'];
    $model = $_POST['model'];
    $name = $_POST['name']; 
    $email = $_POST['email'];
    $telephone = $_POST['telephone'];
    $enquiry = $_POST['enquiry'];
    $message = $_POST['message'];

    //validate form data

    //validate name is not empty
    if(empty($name)){
        $formok = false;
        $errors[] = "You have not entered a name";
    }

    //validate email address is not empty
    if(empty($email)){
        $formok = false;
        $errors[] = "You have not entered an email address";
    //validate email address is valid
    }elseif(!filter_var($email, FILTER_VALIDATE_EMAIL)){
        $formok = false;
        $errors[] = "You have not entered a valid email address";
    }

    //validate message is not empty
    if(empty($message)){
        $formok = false;
        $errors[] = "You have not entered a message";
    }
    //validate message is greater than 20 charcters
    elseif(strlen($message) < 20){
        $formok = false;
        $errors[] = "Your message must be greater than 20 characters";
    }

    //send email if all is ok
    if($formok){
        $headers = "From: Info@Columbus.com" . "\r\n";
        $headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

        $emailbody = "<p>You have recieved a new message from the enquiries form on your website.</p>
                      <p><strong>Name: </strong> {$name} </p>
                        <p><strong>Telephone: </strong> {$telephone} </p>
                        <p><strong>Email Address: </strong> {$email} </p>
                        <br/>
                       <p><strong>Make: </strong> {$make} </p>
                       <p><strong>Model: </strong> {$model} </p>
                      <p><strong>Budget: </strong> {$enquiry} </p>
                      <br/>
                      <p><strong>Message: </strong> {$message} </p>
                      <p>This message was sent from the IP Address: {$ipaddress} on {$date} at {$time}</p>";



        mail("dancundy@hotmail.com","New Enquiry",$emailbody,$headers);

    }

    //what we need to return back to our form
    $returndata = array(
        'posted_form_data' => array(
            'name' => $name,
            'email' => $email,
            'telephone' => $telephone,
            'enquiry' => $enquiry,
            'message' => $message
        ),
        'form_ok' => $formok,
        'errors' => $errors
    );


    //if this is not an ajax request
    if(empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) !== 'xmlhttprequest'){
        //set session variables
        session_start();
        $_SESSION['cf_returndata'] = $returndata;

        //redirect back to form
        //header('location:' . $_SERVER['HTTP_REFERER']);
        header('Location: index.php#contact-form'  );
    }
}

?>

Answer 1

您在提交表单时正在发出 POST 请求。 POST 请求默认通过浏览器发送到服务器的 HTTP 请求进行传输，因此浏览器需要加载导致站点刷新的新数据。

如果您希望浏览器不刷新，那么您需要在客户端使用 Javascript 执行 AJAX 请求。您可以使用 jQuery 来完成此操作。