How to register an ACF widget area in WordPress

acf-widget.php

//The ACF widget 
class ACF_Widget extends WP_Widget {

  /**
   * Register widget with WordPress.
   */
  function __construct() {
    parent::__construct(
      'acf_widget', // Base ID
      'Work Logos', // Name
      array( 'description' => 'Display your work experience.', ) // Args
    );
  }

  /**
   * Front-end display of widget.
   *
   * @see WP_Widget::widget()
   *
   * @param array $args     Widget arguments.
   * @param array $instance Saved values from database.
   */
  public function widget( $args, $instance ) {
    echo $args['before_widget'];
    if ( !empty($instance['title']) ) {
      echo $args['before_title'] . apply_filters( 'widget_title', $instance['title'] ). $args['after_title'];
    }

	$wid = 'widget_' . $args["widget_id"];

	if( have_rows('job', $wid) ): ?>
	<div class="jobs">
	    <?php while ( have_rows('job', $wid) ) : the_row(); ?>
	        <a href = "<?php the_sub_field("website"); ?>" alt = "<?php the_sub_field("name"); ?>"><img src="<?php the_sub_field("logo"); ?>" /></a>        
	    <?php endwhile; ?>
	</div>
	<?php endif;

	    echo $args['after_widget'];
	  }

  /**
   * Back-end widget form.
   *
   * @see WP_Widget::form()
   *
   * @param array $instance Previously saved values from database.
   */
  public function form( $instance ) {
    if ( isset($instance['title']) ) {
      $title = $instance['title'];
    }
    else {
      $title = __( 'New title', 'text_domain' );
    }
    ?>
    <p>
      <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
      <input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>">
    </p>
    <?php
  }

//Sanitize widget form values as they are saved.

  public function update( $new_instance, $old_instance ) {
    $instance = array();
    $instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';

    return $instance;
  }

} // class ACF_Widget

// register ACF_Widget widget
add_action( 'widgets_init', function(){
  register_widget( 'ACF_Widget' );
});