一般来讲WordPress的文章数量达到一定量级时,运行速度就会变慢。网上看到的代码,记录一下解决SQL_CALC_FOUND_ROWS查询使网站变慢问题。
<?php
/**
* Plugin Name: WP Fast Query
* Plugin URI: https://jiloc.com/
* Description: WordPress 10w+数据时, 解决SQL_CALC_FOUND_ROWS查询使网站变慢问题
* Version: 1.0.0
* Author: Leo
* Author URI: https://jiloc.com/
* Author Email: admin@jiloc.com
* Text Domain: wp-fast-query
* Domain Path: /languages
* License: GPL 2.0
* License URI: http://www.gnu.org/licenses/gpl-2.0.html
*/
if ( ! function_exists( 'jset_no_found_rows' ) ) {
/**
* 设置WP_Query的 'no_found_rows' 属性为true,禁用SQL_CALC_FOUND_ROWS
*
* @param WP_Query $wp_query WP_Query实例
* @return void
*/
function jset_no_found_rows(\WP_Query $wp_query)
{
$wp_query->set('no_found_rows', true);
}
}
add_filter( 'pre_get_posts', 'jset_no_found_rows', 10, 1 );
if ( ! function_exists( 'jset_found_posts' ) ) {
/**
* 使用 EXPLAIN 方式重构
*/
function jset_found_posts($clauses, \WP_Query $wp_query)
{
// Don't proceed if it's a singular page.
if ($wp_query->is_singular()) {
return $clauses;
}
global $wpdb;
$where = isset($clauses['where']) ? $clauses['where'] : '';
$join = isset($clauses['join']) ? $clauses['join'] : '';
$distinct = isset($clauses['distinct']) ? $clauses['distinct'] : '';
$wp_query->found_posts = (int)$wpdb->get_row("EXPLAIN SELECT $distinct * FROM {$wpdb->posts} $join WHERE 1=1 $where")->rows;
$posts_per_page = (!empty($wp_query->query_vars['posts_per_page']) ? absint($wp_query->query_vars['posts_per_page']) : absint(get_option('posts_per_page')));
$wp_query->max_num_pages = ceil($wp_query->found_posts / $posts_per_page);
return $clauses;
}
}
add_filter( 'posts_clauses', 'jset_found_posts', 10, 2 );