Question

我正在制作一个查询表格。我是jquery的新手。在阅读了jquery验证插件和ajax后，我编写了以下代码。此代码首先验证表单，然后通过ajax提交表单。如果我提交表格，表格提交两次。结果来了两次我无法犯错误。

<script>
$(document).ready(function () {
    $('#contactForm').validate({
        rules: {
            name: {
                required: true
            },
            email: {
                required: true,
                email: true
            },
            address: {
                required: true
            },
            message: {
                required: true
            },
            security: {
                required: true
            }
        },
        messages: {
            name: {
                required: '* Please Enter Your Name.'
            },
            email: {
                required: "* Please Enter Your E-mail  ",
                email: "* Please enter proper E-mail  "
            },
            address: {
                required: "* Please enter address."
            },
            message: {
                required: "* Please enter Enquiry"
            },
            security: {
                required: "* Please enter Security code"
            }
        },
        submitHandler: function (form) {
            // Ajax Submit here

            // alert($("#contactForm").serialize());

            $.ajax({
                type: "POST",
                url: "assets/sendmail.php",
                data: $("#contactForm").serialize(),
                success: function (result) {
                    if (result == 'Success') {
                        $("#contactForm").hide();
                        $("#contact_response").html('<div class="alert alert-success">Thank you for your feedback.</div>');
                    } else {
                        alert(result);
                    }
                    return false;
                }
            });
            return false;
        }

    });
});

html表单是

 <form action="assets/sendmail.php" method="post" name="contactForm" id="contactForm" >
                    <!-- STEP-2 : GENERAL SETTINGS -->
                    <input type="hidden" name="success_page" value="../contact-us?res=thank-you" id="success_page" /><!-- PAGE TO REDIRECT AFTER SUBMIT -->
                    <input type="hidden" name="email_to" value="<?=get_settings('contact_email');?>" id="email_to" /><!-- EMAIL ADDRESS WHERE WE WANT TO RECEIVE EMAIL -->
                    <input type="hidden" name="email_subject" value="Query Recieved" id="email_subject" /><!-- SUBJECT OF THE EMAIL -->
                    <!-- STEP-2 : GENERAL SETTINGS -->

                    <label for="name" class="nameLabel">Name</label>
                      <input id="name" type="text" name="name"   />
                    <label class="control-label">Email address</label>
                        <div class="controls">
                          <input type="email" name="email" id="email" />
                          <p class="help-block"></p>
                        </div>
                    <label for="address">Address</label>
                      <input id="address" type="text" name="address"  />
                    <label for="message" class="messageLabel">Enquiry</label>
                      <textarea id="message" name="message"  /></textarea>
                    <label >Security Code</label> 
                        <img src="classes/CaptchaSecurityImages.php?width=100&amp;height=30&amp;characters=5" alt="captcha" style="vertical-align:bottom;"/>&nbsp;&nbsp;&nbsp;<input id="security" name="security" class="required" type="text" style="width:30%;vertical-align:bottom;margin-bottom:0px;padding-bottom:0px;"/></br>
                    <button type="submit" id="submit" name="submit">Send</button>
                </form>
                    </script>

Answer 1

Your HTML & JavaScript code is working

但是，在您的OP中，您似乎已经在一组<script></script>代码中包含了jQuery和HTML ...

您在JavaScript的开头有一个<script>标记....

<script>
$(document).ready(function () {
    $('#contactForm').validate({
        rules: {
            ....

您的HTML结尾处有一个结束</script>标记...

         ....
    </form>
</script>

你不能这样做，它可能会打破整个页面。仅在<script></script>代码中包含JavaScript ...

<script>
    $(document).ready(function () {

        $('#contactForm').validate({
            // rules, options, etc.
        });

    });
</script>

您的action="assets/sendmail.php"代码中也不需要<form>。您已经.ajax()使用jQuery Validation插件的assets/sendmail.php将数据发送到submitHandler。

我注意到的其他两个小问题......

1）您有一个结束</br>标记。 This is invalid HTML because there is no such thing。 BR is considered an "empty" or "void" tag所以你要么单独使用<br>，要么“自我关闭”它：<br />。（注意斜杠的临界位置/）

2）您的textarea写得像这样：<textarea /></textarea>。这是无效的HTML，因为当它已经有结束标记textarea时，您无法“自我关闭”</textarea>。你只需这样写：<textarea></textarea>。

DEMO修正了HTML并运行jQuery验证： http://jsfiddle.net/a2xdg/

Answer 2

只需在php代码中编写以下逻辑：

if(!empty($email)){
  @mail($email_to, $subject, $body, 'From: <'.$email_from.'>');
}

这样可以防止发送包含空值的电子邮件。

表格提交两次

2 个答案: