[WP AJAX]

WP-AJAX.php

<script>
jQuery(function($){


		$('#eventStatus').on('change', function (e) {
			var status = this.value;
			e.preventDefault();
			$('#eventStatus').fadeOut(300);

			console.log("testing");

			$.ajax({
				url: WPAJAX.ajaxurl,
				type: 'post',
				data: {
					action: 'get_event_by_status',
					eventStatus: status
				},

			})
				.done(function (result) {
					var data = $.parseJSON(result);

					var options = "";

					for(var i in data){
						options += "<option value='"+ data[i].event_id +"'>"+data[i].event_name+"</option>";
					}
				})

				$('.rsvp-name').selectpicker('destroy');
				$('.rsvp-name').append(options);
				$('.rsvp-name').selectpicker('refresh');
		});
</script>
//////////////////////////////////////////////////////////////
<?php
    public static function init()
    {
        $self = new self();
        add_action("wp_ajax_username_check", array($self, 'usernameCheck'));
        add_action("wp_ajax_email_check", array($self, 'emailCheck'));
        add_action("wp_ajax_get_event_by_status", array($self, 'getEvent'));
        //add_action( "wp_ajax_nopriv_check_valid_zip", array($self, 'ZipValidity') );
    }