Wordpress SQL_CALC修復會導致PHP錯誤

我正在尋找一些Wordpress舊主題的後續跟進，其中SQL_CALC被發現會在Wordpress中有一個大型數據庫時放慢速度。我一直在使用這篇文章底部的代碼來解決它，但它確實在我的錯誤日誌中產生了一個錯誤。我將如何防止此錯誤？Wordpress SQL_CALC修復會導致PHP錯誤

PHP Warning: Division by zero in /var/www/vhosts/domain.com/httpdocs/wp-content/themes/greatTheme/functions.php on line 19

原帖： http://wordpress.org/support/topic/slow-queries-sql_calc_found_rows-bringing-down-site?replies=25

在我的functions.php代碼：

add_filter('pre_get_posts', 'optimized_get_posts', 100); 
function optimized_get_posts() { 
    global $wp_query, $wpdb; 

    $wp_query->query_vars['no_found_rows'] = 1; 
    $wp_query->found_posts = $wpdb->get_var("SELECT COUNT(*) FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private')"); 
    $wp_query->found_posts = apply_filters_ref_array('found_posts', array($wp_query->found_posts, &$wp_query)); 
    $wp_query->max_num_pages = ceil($wp_query->found_posts/$wp_query->query_vars['posts_per_page']); 

    return $wp_query; 
}

來源

2012-04-10 ok1ha

基於@大安的建議下，我嘗試以下，並沒有產生任何錯誤：

add_filter('pre_get_posts', 'optimized_get_posts', 100); 
function optimized_get_posts() { 
    global $wp_query, $wpdb; 
    $wp_query->query_vars['no_found_rows'] = 1; 
    $wp_query->found_posts = $wpdb->get_var("SELECT COUNT(*) FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private')"); 
    $wp_query->found_posts = apply_filters_ref_array('found_posts', array($wp_query->found_posts, &$wp_query)); 
    if($wp_query->query_vars['posts_per_page'] <= 0) { 
     $wp_query->max_num_pages = 0; 
    } else { 
     $wp_query->max_num_pages = ceil($wp_query->found_posts/$wp_query->query_vars['posts_per_page']); 
    } 
    return $wp_query; 
}

基本上，代碼檢查，看是否$wp_query->query_vars['posts_per_page']具有積極價值，因此將能夠分裂$wp_query->found_posts。

來源

2012-04-16 21:39:24 Nate

大概$wp_query->query_vars['posts_per_page']設置爲0，這意味着你問PHP除以零$wp_query->found_posts 。當然，這是無法完成的。我不知道在你的代碼中這個變量是在哪裏設置的（是WP處理這個變量的嗎？），但是通過在該行之前添加一個print_r $wp_query->query_vars['posts_per_page'];很容易確認。

來源

2012-04-10 06:58:31 Daan

Wordpress SQL_CALC修復會導致PHP錯誤

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