Ajax with Wordpress

wordpress-ajax.txt

// The HTML
wp_localize_script( 'amd_app_js', 'ajax_object', array( 'ajax_url' => admin_url( 'admin-ajax.php' ) ) );


// The PHP
add_action( 'wp_ajax_get_exhibitors', 'get_exhibitors_callback' );
add_action( 'wp_ajax_nopriv_get_exhibitors', 'get_exhibitors_callback' );


function get_exhibitors_callback() {

	$alphabet = @$_POST['alphabet'];
	$supplier_type = @$_POST['supplier_type'];
	var_dump($_POST);

    die();
}


// The Javascript
$.ajax({
	type: 'POST',
	url: ajax_object.ajax_url,
	data: {
		'alphabet' : 'A',
		'supplier_type' : 'Worker',
		'action': 'get_exhibitors'
	}, success: function (result) {
		alert(result);
		reset_exhibitors();
	},
	error: function () {
		alert("error");
	}
});