PHP AJAX表单将整个网页html作为数据返回

Question

我有一个自定义wordpress插件，它使用jquery和ajax来显示错误等，而无需重新加载页面。目前，ajax返回的数据是整个页面的html代码作为字符串。

我只会包含相关内容：

<form id="contactForm" enctype="multipart/form-data" action="' . esc_url( $_SERVER['REQUEST_URI'] ) . '" method="post"></form>

和php：

// if the submit button is clicked, send the email
    if ( isset( $_POST['cf-submitted'] ) ) {
        $error = False;

        if (empty($_POST["cf-name"])){
            $nameError = "Name is required";
        } else {
            $name = sanitize_text_field( $_POST["cf-name"] );
        }

          // sanitize form values
        $name = sanitize_text_field( $_POST["cf-name"] );
        $email = sanitize_email( $_POST["cf-email"] );
        $phone = "Phone: " . sanitize_text_field( $_POST["cf-phone"] );
        $company = "Company: " . sanitize_text_field( $_POST["cf-company"] );
        $deliverablesArr = $_POST["formDeliverables"];
        $deliverables = "Deliverables: " . implode( $deliverablesArr);
        $body = "Message Body: " . esc_textarea( $_POST["cf-body"] );

...等。等

    // If email has been process for sending, display a success message
    if ( !$error ) {
        if ( wp_mail( $to, $subject, $message, $headers, $attachments ) ) {
        echo '<div>';
        echo '<p>Thanks for contacting us, expect a response soon.</p>';
        echo '</div>';
            if ($attachmentSet) {
                print_r('attachment set');
                //clean up your temp files after sending
                foreach($attachments as $att) {
                    @unlink($att);
                };
            }
        } else {
            echo 'An unexpected error occurred';
        }
    }

和javascript：

// Set up an event listener for the contact form.
$(function() {
    // Get the form.
    var form = $('#contactForm');

    // Get the messages div.
    var formMessages = $('#messages');

    $('#contactForm').submit(function(e) {
    // Stop the browser from submitting the form.
    e.preventDefault();

    // Serialize the form data.
    var formData = $(form).serialize();
    // Submit the form using AJAX.
    $.ajax({
        type: 'POST',
        url: $(form).attr('action'),
        data: formData
    })
    .done(function(response) {
        // Make sure that the formMessages div has the 'success' class.
        $(formMessages).removeClass('error');
        $(formMessages).addClass('success');

        // Set the message text.
        $(formMessages).text(response);

        // Clear the form.
        $('#name').val('');
        $('#company').val('');
        $('#phone').val('');
        $('#email').val('');
        $('#projectDescription').val('');
    })
    .fail(function(data) {
        // Make sure that the formMessages div has the 'error' class.
        $(formMessages).removeClass('success');
        $(formMessages).addClass('error');

        // Set the message text.
        if (data.responseText !== '') {
            $(formMessages).text(data.responseText);
        } else {
            $(formMessages).text('Oops! An error occured and your message could not be sent.');
        }
    });
});
});

不确定这里到底发生了什么。所有formData都是正确序列化的，我可以使用console.log。 ajax函数中发生的事情与我所拥有的不一致。还试图明确设置在ajax调用中使用的数据，但它根本不返回任何数据。只是一个空字符串。提前谢谢！