Form submission using AJAX and handling response in Wordpress Website - ajax

Question

I have a wordpress website. I have made a contact form and it is POSTed by AJAX.
Here's the code:
<script type="text/javascript">
jQuery(document).ready(function(){
$("#error_box").hide();
$('#contact_form').submit(function(e){
// prevent the form from submitting normally
e.preventDefault();
var na=$("#1").val();
var email2=$("#2").val();
var subject2 = $("#3").val();
var message2 = $("#4").val();
var mydata = "pn2="+na+"&email="+email2+"&subject="+subject2+"&msg="+message2;
alert(mydata);
$("#contact_form").css({"opacity":"0.1"});
$.ajax ({
type: 'POST',
url: $(this).attr.action, // Relative paths work fine
data: mydata,
success: function(){
$("#contact_form").css({"opacity":"1"});
$('#error_box').fadeIn('fast').css({"height": "auto"});
}
});
});
});
</script>
When the form is submitted, I want the error box (#error_box) to display a message according to the data submitted, for example if one of the fields is empty it should display an error, or display a success message if the processing is successful and the form has been mailed. Is there any way I can do this?
[UPDATE]
Here's my contact-form.php file(the action)
<?php if(isset($_POST['pn2']) && isset($_POST['email']) && isset($_POST['subject']) && isset($_POST['msg']))
{
if(empty($_POST['pn2']) || empty($_POST['email']) || empty($_POST['subject']) || empty($_POST['msg'])){
echo 'EMPTY ERROR';
}
else
{
$name = $_POST['pn2'];
$email = $_POST['email'];
$subj = $_POST['subject'];
$msg = $_POST['msg'];
$to = "ankushverma61#gmail.com";
$mail_cont = "FROM: $person_name. \n Email: $email. \n Msg: $msg";
echo "success";
mail($recipient, $subj, $mail_cont) or die("UNABLE TO SEND!!!");
}
}
?>

Answer 1

Form submission using Ajax call
Contact Form
<form action="#" id="contactForm" method="post">
<input class="require" type="text" placeholder="First Name" name="firstName">
<span class="fieldError"></span>
<input class="require" type="text" placeholder="Last Name" name="lastName">
<span class="fieldError"></span>
.
.
.
<input type="submit" value="Submit">
</form>
client side validation with ajax call
jQuery('#contactForm').submit(ajaxSubmit);
function ajaxSubmit(){
var newContactForm = jQuery(this).serialize();
var flag = 0;
jQuery('.require', '#contactForm').each(function(){
var inputVal = jQuery(this).val();
if(jQuery.trim(inputVal) === ""){
flag = 1;
jQuery(this).next().html("Can't be blank");
jQuery(this).next().show();
}
else{
jQuery(this).next().hide();
}
});
if(flag){
return false;
}
jQuery.ajax({
type:"POST",
url: "/wp-admin/admin-ajax.php?action=contactForm",
data: newContactForm,
success:function(data){
jQuery(':input','#contactForm')
.not(':button, :submit, :reset, :hidden')
.val('')
.removeAttr('checked')
.removeAttr('selected');
jQuery("#feedback").html(data);
jQuery("#feedback").fadeOut(10000);
},
error: function(errorThrown){
alert(errorThrown);
}
});
return false;
}
store form data in db and send mail
add the following code in functions.php
wp_enqueue_script('jquery');
add_action('wp_ajax_addContactForm', 'addContactForm');
add_action('wp_ajax_nopriv_addContactForm', 'addContactForm');
function addContactForm(){
global $wpdb;
$first_name = $_POST['firstName']; $last_name = $_POST['lastName'];
$email = $_POST['email'];
.
.
.
if($wpdb->insert('table_name',array(
'first_name' => $first_name,
'last_name' => $last_name,
'email' => $email,
.
.
.
))===FALSE){
echo "Error";
}
else {
$headers = 'From: xyz <xyz#xyz.com>';
$subject = "Thank you";
$body = "<p>Thank you</p><p>.........</p>";
wp_mail( $email, $subject, $body, $headers);
echo "<div class='success'>Thank you for filling out your information, we will be in contact shortly.</div>";
}
exit;
}

Answer 2

You should use:
$.ajax ({
type: 'POST',
url: $(this).attr.action,
data: mydata,
success: function(response) { // here you receive response from you serverside
$("#contact_form").css({"opacity":"1"});
$('#error_box').html(response).fadeIn('fast').css({"height": "auto"});
}
});
Your server action url: $(this).attr.action, should return message which be inserted in #error_box

Answer 3

First create form like this
<p class="register-message"></p>
<form action="#" method="POST" name="testregister" class="register-form">
<fieldset>
<label><i class="fa fa-file-text-o"></i> Register Form</label>
<input type="text" name="firstname" placeholder="Username" id="firstname">
<p id="firstname-error" style="display:none">Firstname Must be Enter</p>
<input type="email" name="email" placeholder="Email address" id="email">
<p id="email-error" style="display:none">Email Must Be Enter</p>
<input type="submit" class="button" id="test" value="Register">
</fieldset>
</form>
then bind the click and send ajax call
<script type="text/javascript">
jQuery('#test').on('click', function(e) {
e.preventDefault();
var firstname = jQuery('#firstname').val();
var email = jQuery('#email').val();
if (firstname == "") {
jQuery('#firstname-error').show();
return false;
} else {
jQuery('#firstname-error').hide();
}
if (email == "") {
jQuery('#email-error').show();
return false;
} else {
jQuery('#email-error').hide();
}
jQuery.ajax({
type: "POST",
dataType: 'json',
url: "<?php echo admin_url('admin-ajax.php'); ?>",
data: {
action: "test", // redirect function in function.php
firstname: firstname,
email: email
},
success: function(results) {
//console.log(results);
if (results == "1") {
jQuery('.register-message').text("Email already exist");
} else {
jQuery('.register-message').text("Register successfu");
}
},
error: function(results) {}
});
});
</script>
In function.php add the below code to insert data in table
<?php
//
add_action('wp_ajax_test', 'test', 0);
add_action('wp_ajax_nopriv_test', 'test');
function test()
{
$firstname = stripcslashes($_POST['firstname']);
$email = stripcslashes($_POST['email']);
global $wpdb;
$q = $wpdb->prepare("SELECT * FROM wp_test WHERE email='" . $email . "' ");
$res = $wpdb->get_results($q);
if (count($res) > 0) {
echo "1";
} else {
$user_data = array(
'firstname' => $firstname,
'email' => $email
);
$tablename = $wpdb->prefix . 'test';
$user_id = $wpdb->insert($tablename, $user_data);
echo "0";
}
die;
}