Check WooCommerce coupon via Ajax

Here is how a WooCommerce coupon code can be checked for validity. The code below allows us to check WooCommerce coupon against the database. This is done using the inbuilt WC_Coupon class provided by WooCommerce.

The coupon code is sent to the function coupon_check_via_ajax(). The above function is AJAX enabled by registering it with wordpress AJAX using wp_ajax_*actions for both logged in and public users.

	-- jQuery Code
	jQuery(function($){
	jQuery('input[name="check_coupon"]').on('click', function(){
	vardata= {
	'action':'check_coupon_via_ajax',
	'code':jQuery('input[name="coupon_code"]').val()
	};
	jQuery.post('/wp-admin/admin-ajax.php', data, function(response) {
	if(response.status==0){
	// -- ERROR
	} else {
	// -- SUCCESS
	}
	}, 'json');
	});
	});

	-- PHP Code
	function coupon_check_via_ajax(){

	$code = strtolower(trim($_POST['code']));
	$coupon = new WC_Coupon($code);
	$coupon_post = get_post($coupon->id);

	if(!empty($coupon_post) && $coupon_post != null){
	$message = 'Coupon not valid';
	$status = 0;
	if($coupon_post->post_status == 'publish'){
	$message = 'Coupon validated';
	$status = 1;
	}
	} else {
	$status = 0;
	$message = 'Coupon not found!';
	}

	print json_encode( [ 'status' => $status, 'message' => $message, 'poststatus' => $coupon_post->post_status, 'coupon_post' => $coupon_post ] );
	exit();

	}

	add_action( 'wp_ajax_check_coupon_via_ajax', 'coupon_check_via_ajax' );
	add_action( 'wp_ajax_nopriv_check_coupon_via_ajax', 'coupon_check_via_ajax' );

view raw the.code hosted with ❤ by GitHub

More about WC_Coupon from the WooCommerce documentation can be found here

Feature photo by Nimit Kansagra