Simple WordPress Advertising Plugin: Widget and Shortcode | http://www.ibenic.com/simple-wordpress-advertising-plugin-widget-and-shortcode

include.php

<?pbp

class Simple_WP_Ads {
  // ...
  
  public function load_dependencies(){

		// ...
		
		require_once SWA_ROOT .'inc/swa-statuses.php';

		require_once SWA_ROOT .'inc/swa-widget.php'; 
		
		// ...

  }
  
  // ...
}
		
?>

include2.php

<?pbp

class Simple_WP_Ads {
  // ...
  
  public function load_dependencies(){

		// ...
		
		require_once SWA_ROOT .'inc/swa-statuses.php';

		require_once SWA_ROOT .'inc/swa-widget.php';
		require_once SWA_ROOT .'inc/swa-shortcode.php';
		
		// ...

  }
  
  // ...
}
		
?>

shortcode.php

<?php

function swa_shortocde( $atts ) {

	$swa = swa();
	$ads = $swa->get_ads();
	$output = "";
	if( $ads ) {

		$top_ads = $ads['top'];
		$bottom_ads = $ads['bottom'];
		$merged_ads = array_merge( $top_ads, $bottom_ads );

		if( count( $merged_ads ) > 0 ) {
			$random_ad = array_rand( $merged_ads );
			$the_random_ad = $top_ads[ $random_ad ];
			swa_set_impressions( $the_random_ad ); 

			 

			$ad_meta = get_post_meta( $the_random_ad['id'], 'swa_info', true );
			
			$link = $ad_meta['link'];

			$output =  '<div class="swa_ad">';
				$output .=  '<a data-id="' . $the_random_ad['id'] . '" target="_blank" href="' . $link . '">';
					$output .=  get_the_post_thumbnail( $the_random_ad['id'], 'full' );
					$output .=  '<p>' . $the_random_ad['post_title'] . '</p>';
				$output .=  '</a>';
			$output .=  '</div>';
			
	 
		}
	}	
	return $output;
}

add_shortcode( 'swa', 'swa_shortocde' );

shortcode2.php

<?php

// swa-functions.php

/**
 * Display the shortcode in the column
 * @param  number $post_id    
 * @param  string $column_key Column key
 * @return string             
 */
function swa_shortcode( $post_id, $column_key ) {
     
    echo '<input value="[swa id=' . $post_id . ']" readonly />';


}

widget.php

<?php

/**
 * Adds SWA widget.
 */
class SWA_Widget extends WP_Widget {

	/**
	 * Register widget with WordPress.
	 */
	function __construct() {
		parent::__construct(
			'swa_widget', // Base ID
			__( 'SWA', 'text_domain' ), // Name
			array( 'description' => __( 'Show SWA Ads', 'text_domain' ), ) // Args
		);
	}
	
	// ...

} 

widget2.php

<?php

/**
 * Adds SWA widget.
 */
class SWA_Widget extends WP_Widget {
  
  // ...
  
	/**
	 * 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 ) {
		$swa = swa();
		$ads = $swa->get_ads();

		if( $ads ) {

			$top_ads = $ads['top'];
			$bottom_ads = $ads['bottom'];
			$merged_ads = array_merge( $top_ads, $bottom_ads );

			if( count( $merged_ads ) > 0 ) {
				$random_ad = array_rand( $merged_ads );
				$the_random_ad = $top_ads[ $random_ad ];
				swa_set_impressions( $the_random_ad ); 

				echo $args['before_widget'];

				$ad_meta = get_post_meta( $the_random_ad['id'], 'swa_info', true );
				
				$link = $ad_meta['link'];

				echo '<div class="swa_ad">';
					echo '<a data-id="' . $the_random_ad['id'] . '" target="_blank" href="' . $link . '">';
						echo get_the_post_thumbnail( $the_random_ad['id'], 'full' );
						echo '<p>' . $the_random_ad['post_title'] . '</p>';
					echo '</a>';
				echo '</div>';
				
				echo $args['after_widget'];
			}
		}	
	}

	/**
	 * Back-end widget form.
	 *
	 * @see WP_Widget::form()
	 *
	 * @param array $instance Previously saved values from database.
	 */
	public function form( $instance ) {
		
		// No need for a form when randomly displaying the Ad
	}

	/**
	 * Sanitize widget form values as they are saved.
	 *
	 * @see WP_Widget::update()
	 *
	 * @param array $new_instance Values just sent to be saved.
	 * @param array $old_instance Previously saved values from database.
	 *
	 * @return array Updated safe values to be saved.
	 */
	public function update( $new_instance, $old_instance ) {
		// No need for an update function
	}

} // class Foo_Widget

widget5.php

<?pbp

class Simple_WP_Ads {
  // ...
  
  public function run(){
  		
  	// ...
  	
  	// Ad click registration
  	add_action( 'wp_ajax_swa_ad_click', 'swa_ad_click' );
  	add_action( 'wp_ajax_nopriv_swa_ad_click', 'swa_ad_click' );
  
  	add_action( 'widgets_init', array( $this, 'register_widget' ) );
  	
  	// ...
  }
  
  // ...
}
		
?>

widget6.php

<?php

class Simple_WP_Ads {
  // ...
  
  /**
	 * Register SWA widget
	 * @return void 
	 */
	public function register_widget() {
	    register_widget( 'SWA_Widget' );
	}
	
	// ...
	
}