The count_users() function will count the number of users who have each of the user roles in your WordPress.
Below is the syntax of count_users () Function, how to use in your WordPress plugin or theme file.
Syntax:
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count_users( string $strategy = 'time', int|null $site_id = null ) |
Used Parameters:
$strategy :(string) (Optional) The computational strategy to use when counting the users. Accepts either ‘time’ or ‘memory’. Default value: ‘time’
$site_id : (int|null) (Optional) The site ID to count users for. Defaults to the current site. Default value: null
Below is an exaple of count_user() funtion hot to use in your code.
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function count_users( $strategy = 'time', $site_id = null ) { global $wpdb; // Initialize if ( ! $site_id ) { $site_id = get_current_blog_id(); } $blog_prefix = $wpdb->get_blog_prefix( $site_id ); $result = array(); if ( 'time' == $strategy ) { if ( is_multisite() && $site_id != get_current_blog_id() ) { switch_to_blog( $site_id ); $avail_roles = wp_roles()->get_names(); restore_current_blog(); } else { $avail_roles = wp_roles()->get_names(); } // Build a CPU-intensive query that will return concise information. $select_count = array(); foreach ( $avail_roles as $this_role => $name ) { $select_count[] = $wpdb->prepare( "COUNT(NULLIF(`meta_value` LIKE %s, false))", '%' . $wpdb->esc_like( '"' . $this_role . '"' ) . '%'); } $select_count[] = "COUNT(NULLIF(`meta_value` = 'a:0:{}', false))"; $select_count = implode(', ', $select_count); // Add the meta_value index to the selection list, then run the query. $row = $wpdb->get_row( " SELECT {$select_count}, COUNT(*) FROM {$wpdb->usermeta} INNER JOIN {$wpdb->users} ON user_id = ID WHERE meta_key = '{$blog_prefix}capabilities' ", ARRAY_N ); // Run the previous loop again to associate results with role names. $col = 0; $role_counts = array(); foreach ( $avail_roles as $this_role => $name ) { $count = (int) $row[$col++]; if ($count > 0) { $role_counts[$this_role] = $count; } } $role_counts['none'] = (int) $row[$col++]; // Get the meta_value index from the end of the result set. $total_users = (int) $row[$col]; $result['total_users'] = $total_users; $result['avail_roles'] =& $role_counts; } else { $avail_roles = array( 'none' => 0, ); $users_of_blog = $wpdb->get_col( " SELECT meta_value FROM {$wpdb->usermeta} INNER JOIN {$wpdb->users} ON user_id = ID WHERE meta_key = '{$blog_prefix}capabilities' " ); foreach ( $users_of_blog as $caps_meta ) { $b_roles = maybe_unserialize($caps_meta); if ( ! is_array( $b_roles ) ) continue; if ( empty( $b_roles ) ) { $avail_roles['none']++; } foreach ( $b_roles as $b_role => $val ) { if ( isset($avail_roles[$b_role]) ) { $avail_roles[$b_role]++; } else { $avail_roles[$b_role] = 1; } } } $result['total_users'] = count( $users_of_blog ); $result['avail_roles'] =& $avail_roles; } return $result; } |
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