'.
'if(jQuery)'.
'{'.
'jQuery.ajax({'.
'type : "GET",'.
'url : "'.admin_url( 'admin-ajax.php' ).'",'.
'data : '.
'{ '.
'action : "ajax-hits-counter-increment",'.
'post_id : '.$post->ID.
'}'.
'});'.
'}'.
'';
}
function ajax_hits_counter_increment()
{
if( !isset($_GET['post_id']) || empty($_GET['post_id']) )
{
die( '0' );
}
$post_id = intval( filter_var( $_GET['post_id'], FILTER_SANITIZE_NUMBER_INT ) );
if( empty($post_id) )
{
die( '0' );
}
$current_hits = get_post_meta( $post_id, 'hits', true );
if( empty($current_hits) )
{
$current_hits = 0;
}
$current_hits++;
update_post_meta( $post_id, 'hits', $current_hits );
die( strval( $current_hits ) );
}
///////////////////////////////////////////////////////////////////////////////
function ajax_hits_counter_posts_table_column( $column )
{
$column['hits'] = 'Hits';
return $column;
}
function ajax_hits_counter_posts_table_row( $column_name, $post_id )
{
if( $column_name=='hits' )
{
$current_hits = get_post_meta( $post_id, 'hits', true );
if( empty($current_hits) )
{
$current_hits = 0;
}
echo( $current_hits );
}
}
function ajax_hits_counter_posts_table_sortable( $column )
{
$column['hits'] = 'hits';
return $column;
}
function ajax_hits_counter_posts_table_orderby( $vars )
{
if( isset($vars['orderby']) && $vars['orderby']=='hits' )
{
$vars = array_merge(
$vars,
array(
'meta_key' => 'hits',
'orderby' => 'meta_value_num'
)
);
}
return $vars;
}
///////////////////////////////////////////////////////////////////////////////
add_filter('the_content', 'ajax_hits_counter_init', 100);
///////////////////////////////////////////////////////////////////////////////
add_action( 'wp_ajax_nopriv_ajax-hits-counter-increment', 'ajax_hits_counter_increment' );
add_action( 'wp_ajax_ajax-hits-counter-increment', 'ajax_hits_counter_increment' );
///////////////////////////////////////////////////////////////////////////////
add_filter( 'manage_posts_columns', 'ajax_hits_counter_posts_table_column' );
add_filter( 'manage_posts_custom_column', 'ajax_hits_counter_posts_table_row', 10, 2 );
add_filter( 'manage_edit-post_sortable_columns', 'ajax_hits_counter_posts_table_sortable' );
add_filter( 'request', 'ajax_hits_counter_posts_table_orderby' );
///////////////////////////////////////////////////////////////////////////////
/**
* Adds ajax_hits_counter_popular_posts_widget widget.
*/
class AJAX_Hits_Counter_Popular_Posts_Widget extends WP_Widget
{
///////////////////////////////////////////////////////////////////////////
protected $defaults = array(
'widget_id' => 'ajax_hits_counter_popular_posts_widget',
'count' => 5,
'cache_lifetime' => 86400,
);
///////////////////////////////////////////////////////////////////////////
/**
* Register widget with WordPress.
*/
public function __construct()
{
parent::__construct(
$this->defaults['widget_id'],
'AJAX Hits Counter: Popular Posts',
array(
'description' => 'Displays popular posts counted by AJAX Hits Counter.',
'classname' => $this->defaults['widget_id'],
)
);
}
///////////////////////////////////////////////////////////////////////////
/**
* 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 )
{
extract( $args );
$popular_posts = $this->getPopularPosts( array_merge( $instance, array( 'widget_id' => $args['widget_id'] ) ) );
if( empty($popular_posts) )
{
return false;
}
$title = apply_filters( 'widget_title', $instance['title'] );
$output = $before_widget;
if ( !empty( $title ) )
{
$output .= $before_title.$title.$after_title;
}
$output .= $this->getHTML( $popular_posts );
$output .= $after_widget;
echo( $output );
}
///////////////////////////////////////////////////////////////////////////
/**
* Returns Popular Posts
*
* @param array $args
* @return array
*/
public function getPopularPosts( $args = array() )
{
global $wpdb;
// args
$args = array_merge( $this->defaults, $args );
// cache key
$cache_key = 'ajax_hits_counter_popular_posts_widget_'.md5( $args['widget_id'] );
// try to get cached data from transient cache
$cache = get_transient( $cache_key );
if( !empty($cache) )
{
// cache exists, return cached data
return $cache;
}
$q = '
SELECT
p.ID,
p.post_title,
m.meta_value as hits
FROM
'.$wpdb->postmeta.' m,
'.$wpdb->posts.' p
WHERE
m.post_id = p.ID
AND
m.meta_key = \'hits\'
AND
p.post_status = \'publish\'
AND
p.post_date_gmt < \''.date( 'Y-m-d H:i:s' ).'\'
AND
p.post_type = \'post\'
ORDER BY
( m.meta_value + 0 ) DESC,
p.post_date_gmt DESC
LIMIT
'.$args['count'];
$popular_posts = $wpdb->get_results($q);
// store result to cache
set_transient( $cache_key, $popular_posts, $args['cache_lifetime'] );
return $popular_posts;
}
///////////////////////////////////////////////////////////////////////////
/**
* Returns HTML of Popular Posts
*
* @param array $popular_posts
* @return string
*/
public function getHTML( $popular_posts = array() )
{
if( empty($popular_posts) )
{
return false;
}
$html = '';
foreach( $popular_posts as $p )
{
$html .=
'- '.
''.
''.$p->post_title.''.
''.
'
';
}
$html .= '
';
return $html;
}
///////////////////////////////////////////////////////////////////////////
/**
* 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 )
{
return array(
'title' => trim( strip_tags( $new_instance['title'] ) ),
'count' => intval( preg_replace( '#[^0-9]#', '', $new_instance['count'] ) ),
'cache_lifetime' => intval( preg_replace( '#[^0-9]#', '', $new_instance['cache_lifetime'] ) ),
);
}
///////////////////////////////////////////////////////////////////////////
/**
* Back-end widget form.
*
* @see WP_Widget::form()
*
* @param array $instance Previously saved values from database.
*/
public function form( $instance )
{
// defaults
$title = __('Popular Posts');
$count = $this->defaults['count'];
$cache_lifetime = $this->defaults['cache_lifetime'];
if( isset($instance['title']) && strlen($instance['title'])>1 )
{
$title = $instance[ 'title' ];
}
if( isset($instance['count']) && intval($instance['count'])>0 )
{
$count = intval($instance['count']);
}
if( isset($instance['cache_lifetime']) && intval($instance['cache_lifetime'])>0 )
{
$cache_lifetime = intval($instance['cache_lifetime']);
}
echo(
''.
''.
''.
'
'.
''.
''.
''.
'
'.
''.
''.
''.
'
'
);
}
///////////////////////////////////////////////////////////////////////////
}
///////////////////////////////////////////////////////////////////////////////
// register AJAX Hits Counter: Popular Posts Widget
add_action( 'widgets_init', create_function( '', 'register_widget( "AJAX_Hits_Counter_Popular_Posts_Widget" );' ) );
///////////////////////////////////////////////////////////////////////////////