Javascript 正在使用验证码验证联系人表单

我有一张有船长的联系表。提交邮件没有问题，但我遇到的问题是验证和将值传输给提交处理程序。我对PHP和Javascript的知识有限。我谦恭地寻求您的帮助，检查这些代码，并告诉我需要做什么才能正确。任何帮助都将不胜感激

下面是邮件处理程序php代码

<?php

require_once('recaptchalib.php');
$publickey = "***********"; 
$subject = 'CONTACT MESSAGE: '  ; //. $_REQUEST['subject']Subject of your email
$to = 'myemailaddress@domain.com';  //Recipient's E-mail
$privatekey = "***********";
$resp = recaptcha_check_answer ($privatekey,
                            $_SERVER["REMOTE_ADDR"],
                            $_POST["recaptcha_challenge_field"],
                            $_POST["recaptcha_response_field"]);

if ($resp->is_valid) {


$headers  = 'MIME-Version: 1.0' . "\r\n";



$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";



$message .= 'Name: ' . $_REQUEST['name'] . "<br>";
$message .= 'Telephone: ' . $_REQUEST['telephone'] . "<br>";
$message .= 'Email: ' . $_REQUEST['email'] . "<br>";
$message .= 'Message: ' . $_REQUEST['message'];

if (@mail($to, $subject, $message, $headers))

{

    // Transfer the value 'sent' to ajax function for showing success message.

    echo 'sent';
}

else
{

    // Transfer the value 'failed' to ajax function for showing error message.
    echo 'failed';

}

 } else {

    echo "The reCAPTCHA wasn't entered correctly. Go back and try it again.".$resp->error;
}

?>

---

第一个问题看起来像是验证函数在HTML中被称为
validate（）

其次，在验证函数中，需要防止表单的默认操作提交和重定向到action processContactEmail.php。HTML表单将始终尝试发布到其默认操作，因此一定要让它执行其他操作（如验证），您必须主动阻止它发布

在JQuery中，您可以通过编辑validateForm函数来防止表单使用event.preventDefault执行默认操作。对于错误，您必须首先将错误变量设置为false（假设一切正常），当您发现错误时，将其更改为true。如果检查后仍然为假，则没有错误

您的Javascript函数应该如下所示：

function validateForm(event) {

    event.preventDefault(); // the variable "event" is automatically included in the submit event listener.

    var error = false; // Assume it's fine unless proven otherwise

    var x = document.forms["enquiries"]["name"].value;
    if (x == null || x == "") {
        sweetAlert("Oops...", "Please enter your full name", "error");
        error = true; // The form is not fine. Set error to true.
        // No return, or you will not get to the rest of your function
    }

    var x = document.forms["enquiries"]["email"].value;
    if (x == null || x == "") {
        sweetAlert("Oops...", "Please enter your a valid email address", "error");
        error = true; // The form is not fine. Set error to true.
    }

    var x = document.forms["enquiries"]["message"].value;
    if (x == null || x == "") {
        sweetAlert("Oops...", "Please enter your the message you wish to send", "error");
        error = true; // The form is not fine. Set error to true.
    }


    // If there is no validation error, next to process the mail function
    if(error == false){  // error was never set to true, so it must still be false and the form is OK.

        /* Post Ajax function of jQuery to get all the data from the submission of the form as soon as the form sends the values to email.php */
        $.post("processContactEmail.php", $("#enquiries").serialize(),function(result){
            //Check the result set from email.php file.
            if(result == 'sent'){
                sweetAlert("Congratulations", "Your message has been sent successfully!", "success");
            } else {
                //Display the error message

            }
        });
    }
}

在这些更改之后，您的表单将不会发布到其操作，您的validateForm函数应该运行，检查错误，如果没有错误，则将ajax发布到processContactEmail.php
 谢谢你的反馈，凯蒂！我尝试了你的代码，但仍然得到相同的结果。如果我提交的表单是空的，我会收到这样的通知：“没有正确输入reCAPTCHA。请返回并重试。”
    <form name="enquiries" id='enquiries' method="post" action='processContactEmail.php' onSubmit="return validate();">  

<label>  <input name="name" type="text" id="name" style="width: 90%;" placeholder="Name" ></label>

<label><input name="email" type="text" id="email" style="width: 90%;" placeholder="Email"></label>

<label><textarea name="message" id="message" style="width: 96.5%;" class="mssg" rows="10" placeholder="Message"></textarea>
</label>

<label><?php echo recaptcha_get_html($publickey) ?></label>

<label><input name="submit" type='submit' id='mssg_buttton' value='Send Message'></label>

</form>

<form name="enquiries" id='enquiries' method="post" action='processContactEmail.php' onSubmit="return validate();">

$( document ).ready(function() { // Make sure DOM is loaded before attaching the event listener to the form element
    $("#enquiries").on("submit", validateForm); // Add submit listener to the form with the id 'enquiries'  and run the function called validateForm on submit
});

function validateForm(event) {

    event.preventDefault(); // the variable "event" is automatically included in the submit event listener.

    var error = false; // Assume it's fine unless proven otherwise

    var x = document.forms["enquiries"]["name"].value;
    if (x == null || x == "") {
        sweetAlert("Oops...", "Please enter your full name", "error");
        error = true; // The form is not fine. Set error to true.
        // No return, or you will not get to the rest of your function
    }

    var x = document.forms["enquiries"]["email"].value;
    if (x == null || x == "") {
        sweetAlert("Oops...", "Please enter your a valid email address", "error");
        error = true; // The form is not fine. Set error to true.
    }

    var x = document.forms["enquiries"]["message"].value;
    if (x == null || x == "") {
        sweetAlert("Oops...", "Please enter your the message you wish to send", "error");
        error = true; // The form is not fine. Set error to true.
    }


    // If there is no validation error, next to process the mail function
    if(error == false){  // error was never set to true, so it must still be false and the form is OK.

        /* Post Ajax function of jQuery to get all the data from the submission of the form as soon as the form sends the values to email.php */
        $.post("processContactEmail.php", $("#enquiries").serialize(),function(result){
            //Check the result set from email.php file.
            if(result == 'sent'){
                sweetAlert("Congratulations", "Your message has been sent successfully!", "success");
            } else {
                //Display the error message

            }
        });
    }
}