I am trying to get the results of an ajax request in wordpress, but I am getting result of '0' in an alert box of javascript, so the form looks like this:
<form class="form" id="ajax-contact-form" action="#">
<input type="text" name="name" id="name" placeholder="Name" required="">
<button type="submit" class="btn">Submit</button>
</form>
The javascript looks like this:
$('#ajax-contact-form').submit(function(e){
$.ajax({
data: {action: 'contact_form'},
type: 'post',
url: ajaxurl,
success: function(data) {
alert(data); // This prints '0', I want this to print whatever name the user inputs in the form.
}
});
})
And the PHP:
add_action('wp_ajax_contact_form', 'contact_form');
add_action('wp_ajax_nopriv_contact_form', 'contact_form');
function contact_form()
{
echo $_POST['name'];
}
Does anyone know if the code above is correct, I have also tried $_REQUEST['name'] and it doesnt work.
Thanks soo much,
Ajax, short for Asynchronous Javascript and XML, is a JavaScript programming technique which allows developers to transfer data without reloading a page. It is most commonly used in web forms allowing users to submit form data without reloading a page.
Answer: Use the jQuery $. post() Method You can simply use the $. post() method in combination with the serialize() method to submit a form using AJAX in jQuery. The serialize() method creates a URL encoded text string by serializing form values for submission. Only "successful controls" are serialized to the string.
In WordPress, we send all AJAX request to a common URL, then wordpress internally calls the corresponding method according to the parameters which we have sent with the request. You can use the admin_url( 'admin-ajax. php' ) function of WordPress to get this url.
Try something like this, you did not add the name
parameter you are expecting in your PHP contact_form
function, so you must add it to the data
attribute in the jQuery ajax function call.
$('#ajax-contact-form').submit(function(e){
var name = $("#name").val();
$.ajax({
data: {action: 'contact_form', name:name},
type: 'post',
url: ajaxurl,
success: function(data) {
console.log(data); //should print out the name since you sent it along
}
});
});
Revisiting the answer, year 2022. The Accepted answer is accepting BLINDLY any AJAX request without verifying WordPress Nonces. AJAX request should be validated as a legitimate request instead of a potentially nefarious request from some unknown bad actor.
The first thing your AJAX handler should do is verify the nonce sent by jQuery with
check_ajax_referer()
, which should be the same value that was localized when the script was enqueued.
First we pass the AJAX url and create and pass our nonce through wp_localize_script()
. wp_localize_script()
must be called after the script has been registered using wp_register_script()
or wp_enqueue_script()
.
<?php
wp_localize_script( 'script', 'localize',
array(
'_ajax_url' => admin_url( 'admin-ajax.php' ),
'_ajax_nonce' => wp_create_nonce( '_ajax_nonce' ),
)
);
From our script.js
file we declare our AJAX function.
$(function(){
$('button').click(() => {
$.ajax({
type: 'POST',
url: localize._ajax_url,
data: {
_ajax_nonce: localize._ajax_nonce,
test: 'test',
/**
* The action parameter is the The dynamic portion of the wp_ajax_{$action} action hook (Ajax action callback being fired).
*
* @see https://developer.wordpress.org/reference/hooks/wp_ajax_action/
* @see https://developer.wordpress.org/reference/hooks/wp_ajax_nopriv__requestaction/
*/
action: '_POST_action',
},
success: (res) => {
console.log(res);
}
});
});
});
And we process the result and send a JSON response back to an Ajax request.
<?php
add_action( 'wp_ajax__POST_action', function () {
if ( check_ajax_referer( '_ajax_nonce' ) ) {
$test = $_POST['test'];
//...
wp_send_json_success();
} else {
wp_send_json_error();
};
} );
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