Ajax filter

Hi I have managed to get an Ajax filter to work on my project archive page, however I read it is not secure unless I have use nonce on the ajax request.

I got stuck, and would be grateful if someone could point me in the right direction to get the nonce to work. Here is my code:

FILTER.PHP

<?php

function OB_filter_function(){

  // Check Security Nonce
    // if ( !wp_verify_nonce( $_POST['security'], 'ob-ajax-nonce') ) {
    //     wp_send_json_error( array('message' => 'Nonce is invalid.') );
    // }
  // check_ajax_referer( 'ob_ajax_object.security', 'security' );
  // echo 'success';

			if(!empty($_POST['pjCat']))
		  foreach($_POST['pjCat'] as $pjCat) {
							$categories[] = $pjCat;
		  }
			$args['tax_query'] = array(
				array(
					'taxonomy' => 'project_category',
					'field' => 'slug',
					'terms' => $categories
				)
			);

			$query = new WP_Query( $args );

			if( $query->have_posts() ) : ?>

			<div class="container-grid">

				<?php
				while( $query->have_posts() ): $query->the_post();?>
					<div class="grid-item">
							<a href="<?= the_permalink() ?>">
								<?php
								if ( has_post_thumbnail() ) {
								    the_post_thumbnail();
								}?>
								<h3><?= the_title() ?></h3>
							</a>
					</div>
					<?php
				endwhile;?>
				</div><!--end container-inner-->

			<?php
			wp_reset_postdata();
			else :
				echo 'No posts found';
			endif;

			wp_die();
}

/**
 * Check the referrer for the AJAX call.
 */
function ob_callback() {
    check_ajax_referer( 'ob_ajax_object.security', 'security' );
    echo 'success';
    die;
}

?>

ARCHIVE-PROJECTS.PHP

<div class="filterBox">

					<form action="<?php echo site_url() ?>/wp-admin/admin-ajax.php" method="POST" id="filter">
              <label class="container"><input id="checkAll" type="checkbox" name="checkAll" value="all" checked>All<span class="checkmark"></label>
							<?php
								if( $terms = get_terms( 'project_category', 'orderby=name' ) ) :
									foreach ( $terms as $term ) :?>
									<label class="container"><input type="checkbox" name="pjCat[]" value="<?= strtolower($term->name) ?>" checked/><?= $term->name ?><span class="checkmark"></label>
									<?php endforeach;
								endif;
							?>

							<button>Apply</button>

							<input type="hidden" name="action" value="myfilter">
			    </form>
			</div>

		<div id="response">

				 <?php if ( have_posts() ) : ?>

					<div class="container-grid">

					<?php
					/* Start the Loop */
					while ( have_posts() ) :
						the_post();?>

						<div class="grid-item">
								<a href="<?= the_permalink() ?>">
									<?php
									if ( has_post_thumbnail() ) {
											the_post_thumbnail();
									}?>
									<h3><?= the_title() ?></h3>
								</a>
						</div>

					<?php endwhile;?>
        </div><!--end container-grid-->
				<?php endif;  ?>

				</div>
		</div><!--end response-->

FILTER.JS

(function($) {

"use strict";

		$(document).ready(function(){

			$('.filterBox').hide()

			$('.toggleFilter').click(function(){
				$('.filterBox').toggle();
			});

			$("#checkAll").click(function(){
			$('input:checkbox').not(this).prop('checked', this.checked);
			});

			//".checkbox" change
			$('input:checkbox').change(function(){
			    //uncheck "select all", if one of the listed checkbox item is unchecked
			    if(false == $(this).prop("checked")){ //if this item is unchecked
			        $("#checkAll").prop('checked', false); //change "select all" checked status to false
			    }
			    //check "select all" if all checkbox items are checked
			    if ($('input:checkbox:checked').length == $('input:checkbox').length ){
			        $("#checkAll").prop('checked', true);
			    }
			});

			$('#filter').submit(function(){
				var filter = $('#filter');
				$.ajax({
					url: ob_ajax_object.ajax_url,
					data: filter.serialize(), // form data
					type: filter.attr('method'), // POST
					security: ob_ajax_object.security, // Add a nonce/unique number to protect against XSS attacks
					beforeSend:function(xhr){
						filter.find('button').text('Processing...'); // changing the button label
					},
					success:function(data){
						filter.find('button').text('Apply filter'); // changing the button label back
		        $('#response').empty(); // remove existing
						$('#response').hide().html(data).fadeIn(); // insert data
					}
				});
				return false;
			});

		});

})(jQuery);

FUNCTIONS.PHP

//add scripts

function add_scripts() {
	if (is_post_type_archive('projects')) {
			wp_enqueue_script( 'ob_ajax_filter', get_stylesheet_directory_uri() . '/js/filter.js', array( 'jquery' ),'', true );
			wp_localize_script(
			'ob_ajax_filter',
			'ob_ajax_object',
			[
				'ajax_url'  => admin_url( 'admin-ajax.php' ),
				'security'  => wp_create_nonce( 'ob-ajax-nonce' )
			]
		);
	}

}

add_action( 'wp_enqueue_scripts', 'add_scripts' );

//FILTER PROJECTS BY CATEGORY

require_once( __DIR__ . '/filter.php');
add_action('wp_ajax_myfilter', 'OB_filter_function');
add_action('wp_ajax_nopriv_myfilter', 'OB_filter_function');
add_action( 'OB_filter_function', 'ob_callback' );

• This topic was modified 6 years, 7 months ago by Ol1wp.