Random event widget

<?php
    class RandomEvent extends WP_Widget {

        public function __construct() {

            // Instantiate the parent object

            parent::__construct(
                'random-event',     // Base ID
                'Random Event',      // Name
                array(
                    'classname' => 'widget--random-event',
                    'description' => 'Shows a random event'
                ) // Args
            );
        }

        public function widget( $args, $instance ) {

            // get a random event
            $random_args = array(
                'post_type'         => 'event',
                'orderby'           => 'rand',
                'posts_per_page'    => 1,
            );
            $random_event = get_posts( $random_args );

            // Widget output
            extract( $args );
            $rew_widgettitle = apply_filters( 'widget_title', $instance['rew_widgettitle'] );
            if ( !$rew_widgettitle ) {
                $rew_widgettitle = 'Random event';
            }
            echo $before_widget;
            echo $before_title . $rew_widgettitle . $after_title;

            if ( $random_event ) {
                foreach( $random_event as $event ) {
                    echo '<a href="' . get_the_permalink( $event->ID ) . '">' . get_the_title( $event->ID ) . '</a>';
                }
            }

            echo $after_widget;
        }

        public function update( $new_instance, $old_instance ) {
            // Save widget options
            $instance = $old_instance;
            $instance['rew_widgettitle'] = strip_tags($new_instance['rew_widgettitle']);
            return $instance;
        }

        public function form( $instance ) {
            // Output admin widget options form
            $rew_widgettitle = ! empty( $instance['rew_widgettitle'] ) ? $instance['rew_widgettitle'] : esc_html__( 'Random event', 'text_domain' );
            ?>
            <p>
                <label for="<?php echo $this->get_field_id('rew_widgettitle'); ?>">Widget title:</label>
                <input class="widefat" id="<?php echo $this->get_field_id('rew_widgettitle'); ?>" name="<?php echo $this->get_field_name('rew_widgettitle'); ?>" type="text" value="<?php if ( $rew_widgettitle ) { echo $rew_widgettitle; } ?>" />
            </p>
        <?php }
    }

    function register_my_widgets() {
        if ( function_exists( 'em_content' ) ) {
            register_widget( 'RandomEvent' );
        }
    }
    add_action( 'widgets_init', 'register_my_widgets' );