Question

我的WP_Users表中有超过50,000个注册用户。通常我需要运行查询来检查和统计我的用户的不同状态。

我经常写下面的内容。

$users = get_users(); //This query is not limited I need to run across all my users.
  $active_users = 0;
  foreach ($users as $user) {
    $last_transaction_date = strtotime(get_user_meta($user_id, 'last_trans_date', true));
    $next_recurring_date = strtotime(get_user_meta($user_id, 'next_recurring_date', true));
    $todays_date = strtotime('now');

    if ($todays_date >= $last_transaction_date && $todays_date <= $next_recurring_date ) {
      $active_users++;
    }

  }

这个问题是它为每个用户生成2个数据库调用，因此速度极慢，容易导致崩溃。有没有人有建议？

Answer 1

您应该只对wp_usermeta表执行两次查询像这样

STEP1

$SQLresult1 = $wpdb->get_results("
    SELECT user_id, meta_value
    FROM wp_usermeta
    WHERE meta_key = 'last_trans_date' 
        AND $todays_date >= meta_value
");


//convert it to array
SQLarr1 = [];

foreach ($SQLresult1 as &$item) {
    SQLarr1[$item->user_id] = $item->meta_value
}

STEP2

$SQLresult2 = $wpdb->get_results("
    SELECT user_id, meta_value
    FROM wp_usermeta
    WHERE meta_key = 'next_recurring_date' 
        AND $todays_date <= meta_value
");


//convert it to array
SQLarr2 = [];

foreach ($SQLresul2 as &$item) {
    SQLarr2[$item->user_id] = $item->meta_value
}

STEP3

$active_users = 0;

foreach ($SQLarr1 as $user_id => &$item) {
    if (isset($SQLarr2[$user_id]))
        $active_users++;
}

我没有查看此代码。但你可以看到主要想法

缩放WordPress用户查询

1 个答案: