作为WordPress使用者,能不使用插件就尽量不安装插件,作为WordPress主题制作者,就更不应该让主题依赖插件了。文章阅读计数和热门文章列表是常见的需求…
作为WordPress使用者,能不使用插件就尽量不安装插件,作为WordPress主题制作者,就更不应该让主题依赖插件了。文章阅读计数和热门文章列表是常见的需求,实现起来其实也并不复杂。
设置文章阅读数量函数:
function bzg_set_post_views() {global $post;if( ! isset( $post->ID ) || ! is_singular() ) return;$cookie_name = \'views_\' . $post->ID;if( isset( $_COOKIE[$cookie_name] ) ) return;$post_views = (int) get_post_meta( $post->ID, \'views\', true );if( empty( $post_views ) ) {$post_views = 1;} else {$post_views = $post_views + 1;}update_post_meta( $post->ID, \'views\', $post_views );setcookie( $cookie_name, \'yes\', ( current_time( \'timestamp\' ) + 86400 ) );}add_action( \'get_header\', \'bzg_set_post_views\' );
代码中86400是指同一浏览器访问24小时内不计数,这样就能一定程度上避免刷阅读数。
读取文章阅读数量函数:
function bzg_post_views($post_ID = \'\') {global $post;$post_id = $post_ID;if( ! $post_id ) $post_id = $post->ID;if( ! $post_id ) return;$post_views = (int) get_post_meta( $post_id, \'views\', true );if( empty( $post_views ) ) $post_views = 0;return $post_views;}
以上代码放到主题文件functions.php中,在需要显示文章阅读数的地方调用:
<?php echo bzg_post_views(); ?>
获取阅读数最多的文章:
function bzg_get_most_viewed( $limit = 10 ) {$args = array(\'posts_per_page\' => $limit,\'order\' => \'DESC\',\'post_status\' => \'publish\',\'orderby\' => \'meta_value_num\',\'meta_key\' => \'views\',\'date_query\' => array(array(\'after\' => \'-360day\',)),);$str = implode(\'&\', $args);$postlist = wp_cache_get(\'hot_post_\' . md5($str), \'beizigen\');if(false === $postlist) {$postlist = get_posts( $args );wp_cache_set(\'hot_post_\' . md5($str), $postlist, \'beizigen\', 86400);}foreach ( $postlist as $post ) {echo \'<li><a href=\"\' . get_permalink($post->ID) . \'\" rel=\"bookmark\">\' . $post->post_title . \'</a></li>\';}wp_reset_postdata();}
注意函数中的-360day,是指输出360天内的文章,函数调用方法:
<ul><?php bzg_get_most_viewed(8); ?></ul>