Develop Reference

Pass JavaScript variable to PHP function within Ajax call?

I'm trying to create an ajax search form that gets WordPress posts if the search term is found within the post title. This is my PHP function:
function get_records_ajax($query) {
$args = array(
'post_type' => array('record'),
'post_status' => array('publish'),
'posts_per_page' => 999,
'nopaging' => true,
'meta_query' => array(
'key' => 'title',
'value' => $query,
'compare' => 'IN',
)
);
$ajaxposts = get_posts( $args );
echo json_encode( $ajaxposts );
exit;
}
And this is my jQuery function:
jQuery('.rrm_search_form').on('submit', function(e){
e.preventDefault();
let query = jQuery(this).find('.rrm_search_input').val();
console.log('search submitted for ' + query);
jQuery.ajax({
type: 'POST',
url: '<?php echo admin_url('admin-ajax.php');?>',
dataType: "json",
data: { action : `get_records_ajax(${query})` },
success: function( response ) {
jQuery.each( response, function( key, value ) {
console.log( key, value );
});
},
error: function(xhr, status, error) {
var err = eval("(" + xhr.responseText + ")");
console.log(err.Message);
}
});
});
I've tried lots of different syntax to try and pass the variable within the data action of my ajax call but nothing's working. Any ideas how I might be able to do this?

I assume your ajax URL is fine and loading in the website.
Now all you have to modify your JS scripts and need to add hooks in PHP section. First in your JS script modify the data: line as follows:
data: { action : 'get_records_ajax', query: query },
Also You can add security check if you want. but leave it now.
Secondly, in your PHP file add the following code..
add_action( "wp_ajax_nopriv_get_records_ajax", 'get_records_ajax' );
add_action( "wp_ajax_get_records_ajax", 'get_records_ajax' );
and then in your get_records_ajax receive the query value
function get_records_ajax(){
$query = sanitize_text_field($_POST['query']);
//then your rest code
}
It will return all the post. Now you need to adjust your JS code in the success block :
success: function( response ) {
console.log(response)
//adjust here with your HTML dom elements
}

"Bad Request" 400 server response for AJAX request

All of the usual suspects have been tried to no avail, including setting: ContentType: and dataType:. jQuery has defaults for both, if not specified. Tried serializing the json using JSON.stringify(data) - all combinations of the above don't change the server response. Can't see what I'm missing here that's causing the problem.
Here's the javascript in question:
jQuery(document).ready(function() {
jQuery('.delete_listing').on('click', (function(e) {
var post_type = jQuery(this).data( 'type' ); // Get post type via the 'data-type' attribute of the button.
e.preventDefault();
if (confirm('You want to delete this listing?')) {
jQuery.ajax({
url: fpf_ajax_delete_listing.ajax_url, // 'fpf_ajax_delete_listing' is from wp_localize_script() call
type: 'post',
data: {
action: 'fpf_ajax_delete_listing_process', // part of add_action() call
nonce: fpf_ajax_delete_listing.fpf_delete_listing_nonce, // from wp_localize_script() call.
post_type : post_type
},
success : function( response ) {
console.log(response);
},
error : function( response) {
alert('Error retrieving the information: ' + response.status + ' ' + response.statusText);
console.log(response);
}
});
// clear edit page, msg delete successful, redirect to seller account dashboard
jQuery(function() {
jQuery(".form-group").remove();
jQuery("p").remove();
jQuery("#remove-listing").remove();
jQuery("hr").replaceWith('<h4 style="color:green;"><em>Listing successfully deleted.</em></h4>');
// return to seller dashboard
}); // clear & redirect
} else {
// Do nothing!
}
}));
});
And here's the PHP from the plugin:
function fpf_ajax_delete_listing_shortcode() {
return '<button class="delete_listing" data-type="post" type="button" style="background:red; border-radius:5px; border-width:1px; color:white;">Delete Listing</button>';
}
add_shortcode('ajax_delete_listing', 'fpf_ajax_delete_listing_shortcode');
add_action('wp_enqueue_scripts', 'fpf_enqueue_scripts');
function fpf_enqueue_scripts() {
wp_enqueue_script( 'fpf-delete-listing', plugin_dir_url( __FILE__ ). 'ajax-delete-listing-code.js', array('jquery') );
wp_localize_script( 'fpf-delete-listing', 'fpf_ajax_delete_listing', array(
'ajax_url' => admin_url( 'admin-ajax.php' ),
'fpf_delete_listing_nonce' => wp_create_nonce('fpf-delete-listing-nonce')
));
}
add_action( 'wp_ajax_fpf_ajax_delete_listing', 'fpf_ajax_delete_listing', 20 ); // logged in users only.
function fpf_ajax_delete_listing() {
check_ajax_referer( 'fpf-delete-listing-nonce', 'nonce' ); // dies if nonce is not correct.
$post_id = get_the_ID();
update_post_meta($post_id, 'wpcf-listing-status', 'inactive');
}
return;

Wordpress jQuery send value to database

I am trying to send a value to my wordpress database (wp_usermeta table) when a button is clicked.
Here is what I know so far, I know I need to post the value using AJAX, I also know that wordpress has a function for updating the wp_usermeta table, that is:
update_user_meta( $user_id, 'dashboard_onboarding_status', 'myValue' );
The good news is that myValue isn't a variable - I just want to send the word "complete" to the db. It's also an admin side script - I'm not sure if that makes a difference on how to call the ajax url.
Here is what I have codewise:
In my main js file, I have the following AJAX script:
$('.skizzar_onabording_dashboard #next.step5').click(ajaxSubmit);
function ajaxSubmit(){
jQuery.ajax({
type:"POST",
url: "/wp-admin/admin-ajax.php",
data: {
"value" : "completed"
},
success:function(data){
console.log(data);
}
});
return false;
}
So when a user clicks on .skizzar_onabording_dashboard #next.step5 that should trigger the AJAX function.
Then in my main plugin php file I have the following:
function myFunction(){
global $wpdb;
$user_id = get_current_user_id();
$completed = $_POST['value'];
update_user_meta( $user_id, 'onboarding_status', $completed );
die();
}
add_action('wp_ajax_myFunction', 'myFunction');
I think needless to say this doesn't work, but I'm very new to using AJAX and I ca't figure out why. Seems like it should be simple though - essentially I just want to press a button and add "completed" to the key "onboarding_status" in the usermeta table.

Almost all you need is located here.
First you'll need to localize your admin-ajax.php, beause calling it like url: "/wp-admin/admin-ajax.php" is not a good practice.
wp_localize_script( 'some_handle', 'ajax_post_to_db', array(
'ajaxurl' => admin_url( 'admin-ajax.php'),
));
Then your ajax script to call:
add_action( 'wp_ajax_my_action', 'my_action_callback' );
function my_action_callback() {
global $wpdb;
$user_id = get_current_user_id();
$completed = $_POST['value'];
update_user_meta( $user_id, 'onboarding_status', $completed );
die();
}
And finally the ajax in your js file
$('.skizzar_onabording_dashboard #next.step5').on('click', function(){
ajaxSubmit();
});
function ajaxSubmit(){
jQuery.ajax({
type:'POST',
dataType: 'html',
url: ajax_post_to_db.ajaxurl,
data: {
action: 'my_action_callback'
},
success: function(data){
console.log(data);
},
error : function (jqXHR, textStatus, errorThrown) {
console.log(jqXHR + ' :: ' + textStatus + ' :: ' + errorThrown);
},
});
return false;
}
This should be it.
DISCLAIMER
I'm never 100% sure if it's
data: {
action: 'my_action_callback'
},
or
data: {
'action': 'my_action_callback'
},
But try it and see which one will give you your function callback. I'm pretty sure it should be the first one.
Also you can check the return of the ajax call in your inspector. Just go to 'Network' tab and select XHR and you should see admin-ajax.php and when you click on it you can see all the relevant data it sends (headers, response etc.).

add your ajax function as the action
function ajaxSubmit(){
var data = {
'action': 'myFunction',
'value' : 'completed'
};
jQuery.post("/wp-admin/admin-ajax.php", data, function(response) {
console.log(response);
});
}

jQuery does not hit the Ajax URL on Wordpress

I am trying to implement a poll plugin on wordpress. The jQuery onchange event is working very fine of the below script but doesn't call or display the ajax hit on network .
plugin index page
PHP :
function my_scripts_main() {
wp_enqueue_script(
'my_voter_script',
plugins_url( '/js/main.js' , __FILE__ ),
array( 'jquery' )
);
wp_localize_script( 'my_voter_script',
'myAjax',
array( 'ajaxurl' => admin_url( 'admin-ajax.php' ),
'action'=>'my_poll_srt')
);
}
add_action( 'wp_enqueue_scripts', 'my_scripts_main' );
Plugin Short code Page :
add_action( 'wp_ajax_nopriv_my_poll_srt', 'my_poll_srt_callbck' );
add_action( 'wp_ajax_my_poll_srt', 'my_poll_srt_callbck' );
function my_poll_srt_callbck() {
global $wpdb;
$poll_id=$_POST['poll_id'];
$answer=$_POST['answer'];
$d=mktime(11, 14, 54, 8, 12, 2014);
$created= date("Y-m-d h:i:sa", $d);
/******* My Logic ****************/
echo json_encode(array('YES'=>$count_yes,
'NO'=>$count_no));
wp_die();
}
JS script :
jQuery(document).ready(function(){
jQuery("input[name=answer_srt]:radio").change(function (e) {
e.preventDefault();
// submit();
// $(this).closest("form").submit(function() {
// alert('Hello');
var poll_answer=$(this).val();
var poll_id=jQuery(this).closest("form").find('#poll_id_srt').val();
var vi=jQuery(this);
jQuery.ajax({
url: myAjax.ajaxurl,
type: 'POST',
data: {
action: myAjax.action,
answer:poll_answer,
poll_id:poll_id
},
// dataType: 'html',
success: function(response) {
var obj = JSON.parse(response);
// console.log(obj);
jQuery(vi).closest('form').find('#poll_sht').html('YES='+obj.YES+' NO='+obj.NO);
}
// });
});
});
});
In the code above there are no errors in console panel.
If I put alert() inside the script its working fine but its not hitting admin-ajax.php file. What to do now ? Where am I wrong please help me ?

Your action URL should contain query string of action.
e.g
The action URL is like this
http://localhost/wordpress/wp-admin/admin-ajax.php?action=my_poll_srt

AJAX commenting in WordPress

I'm trying to get AJAX commenting working in WordPress. So far I have written a PHP handler and a script.
My script (modified from here):
jQuery(document).ready(function($){
var commentform = $('#commentform');
commentform.prepend('<div id="comment-status"></div>');
var statusdiv = $('#comment-status');
commentform.submit(function(){
//serialize and store form data in a variable
var data=commentform.serialize();
//Add a status message
statusdiv.html('<p>Processing...</p>');
//Extract action URL from commentform
var formurl=commentform.attr('action');
//Post Form with data
$.ajax({
type: 'POST',
url: formurl,
dataType: 'JSON',
data: data,
error: function(XMLHttpRequest, errorThrown)
{
statusdiv.html('<p class="ajax-error" >Oops, an error occured</p>');
},
success: function(data)
{
statusdiv.html(data);
$('#commentform #comment').val('');
}
});
return false;
});
});
My PHP handler:
function ajaxify_comments( $comment_ID, $comment_status ) {
$comment = get_comment( $comment_ID );
$response = $comment->comment_content;
echo json_encode( $response );
die();
}
add_action( 'comment_post', 'ajaxify_comments', 20, 2 );
My PHP handler, ajaxify_comments(), is hooked to comment_post which fires immediately after the comment is saved to the database. The function gets the comment text and returns a response (the comment text) to my AJAX script. If everything is successful, the comment text is displayed on screen. If unsuccessful, an error message is displayed.
My problem
If I submit a comment, the comment is saved to the database and the comment text is displayed on screen. This bit works! My problem is if I make a second comment without refreshing the page - I always get "Oops, an error occurred". What am I doing wrong?
Update
After #adeneo's suggestion to use the WordPress built in AJAX hooks I have come up with a new script and PHP handler...
Script:
jQuery(document).ready(function($) {
var path = ac.path;
var security = ac.security;
var ajax_url = ac.ajax_url;
var commentform = $('#commentform');
commentform.prepend('<div id="comment-status"></div>');
var statusdiv = $('#comment-status');
commentform.submit(function(){
$.ajax({
type: 'POST',
url: ajax_url,
dataType: 'JSON',
data: {
'action': 'ac',
'security': security
},
success:function(data) {
statusdiv.html(data);
$('#commentform #comment').val('');
},
error: function(data){
statusdiv.html('<p class="ajax-error">Oops, an AJAX error occured</p>');
}
});
return false;
});
});
PHP handler
function ajaxify_comments() {
check_ajax_referer( 'ajax_ac_nonce', 'security' );
$response = 'blah';
echo json_encode( $response );
die();
}
add_action( 'wp_ajax_ac', 'ajaxify_comments' );
For completeness it is worth letting you know that I also have:
wp_enqueue_script( 'ac-script', plugins_url( '/js/script.js', __FILE__ ), array( 'jquery' ), 1.0, true );
$path = get_bloginfo( 'stylesheet_directory' );
// set the nonce security check
$ajax_nonce = wp_create_nonce( 'ajax_ac_nonce' );
wp_localize_script(
'ac-script',
'ac',
array(
'ajax_url' => admin_url( 'admin-ajax.php' ),
'path' => $path,
'security' => $ajax_nonce,
)
);
My question now becomes: How do I make the submitted comment data available to my PHP handler? I guessing I'll need to manually save the comment data to the database? I need this data available in my PHP function first but not sure how to do that?