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今天推送的是wordpress教程的文章，感谢您宝贵的时间阅读
让WordPress统计每天登录的用户数量可以让您基本了解每天的活动情况。您可以使用UserLoginStat插件来完成此操作。它将在后台>；设置>；UserLoginStat显示每天登录的用户数。
搜索后台插件安装界面，以便UserLoginStat联机安装，或下载UserLoginStat：http://wp101.net/plugins/user-login-stat/
哈喽猿认为，将统计数据放在WP仪表板显示器上会好得多，能够编码的朋友也可以参考WordPress仪表板小程序接口(DashboardWidgetsAPI)。
以下是UserLoginStat插件的所有代码：
<?php
/*
Plugin Name: User Login Stats
Plugin URI: http://tareq.weDevs.com/
Description: Displays and monitors the user login statistics
Author: Tareq Hasan
Author URI: http://tareq.weDevs.com/
Donate URI: http://tareq.weDevs.com/
Version: 0.1
*/
class User_Login_Stats{
private $table;
function __construct() {
global $wpdb;
$this->table = $wpdb->prefix . "user_stats";
register_activation_hook( __FILE__, array( &$this, 'install' ) );
add_action( 'wp_login', array( &$this, 'login_update' ) );
add_action( 'wp_head', array( &$this, 'check_user' ) );
add_action( 'admin_menu', array( &$this, 'admin_menu' ) );
}
/**
* Create the table installing the plugin
*
* @global type $wpdb
*/
function install() {
global $wpdb;
$sql = "CREATE TABLE IF NOT EXISTS `{$this->table}` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`date` date NOT NULL,
`count` int(11) NOT NULL,
KEY `id` (`id`)
) ENGINE=MyISAM";
$wpdb->query( $sql );
}
/**
* Run the function when the user logs in
*
* If the users last login date is not today, update the visit count
* and update the last login
*
* @param type $login
*/
function login_update( $login ) {
$user = get_user_by( 'login', $login );
$last_login = ( isset( $user->last_login ) ) ? strtotime( $user->last_login ) : 0;
$last_login_date = date( 'Y-m-d', $last_login );
//if the user already loggedin today, skip him
if( $last_login_date != date( 'Y-m-d', time() ) ) {
$this->update( $user->ID );
}
}
/**
* Runs everytime to check if the user's last login time is more than 24 hours
*
* This function runs on `wp_head` hook and works for only loggedin users
*/
function check_user() {
$current_user = wp_get_current_user();
if( $current_user->ID ) {
$last_login = ( isset( $current_user->last_login ) ) ? strtotime( $current_user->last_login ) : 0;
$duration = 24 * 60 * 60; //24hours
if( (time() - $last_login ) > $duration ) {
$this->update( $current_user->ID );
}
}
}
/**
* Update the database and user last login
*
* If a row is already in the table, increase the count. Otherwise create
* a new row and store 1 as the value
*
* @global type $wpdb
* @param type $user_id
*/
function update( $user_id ) {
global $wpdb;
//if any rows found, increase the count, else insert new row
$today = date( 'Y-m-d', time() );
$row = $wpdb->get_row( "SELECT `count` FROM {$this->table} WHERE `date`='$today'" );
if( $row ) {
$wpdb->query( "UPDATE {$this->table} SET `count`=`count`+1 WHERE `date`='$today'" );
} else {
$wpdb->insert( $this->table, array(
'date' => $today,
'count' => 1
) );
}
//update user last login
update_user_meta( $user_id, 'last_login', gmdate( 'Y-m-d H:i:s' ) );
}
/**
* Adds the admin panel menu to the settings main menu
*/
function admin_menu() {
add_submenu_page( 'options-general.php', 'User Login Stats', 'User Login Stats', 'administrator', 'user_stats', array( $this, 'admin_page' ) );
}
/**
* Displays the statistics in the admin area
*
* @global type $wpdb
* @global type $userdata
*/
function admin_page() {
global $wpdb, $userdata;
$pagenum = ( isset( $_GET['pagenum'] ) ) ? absint( $_GET['pagenum'] ) : 1;
$limit = 30;
$offset = ( $pagenum - 1 ) * $limit;
$sql = "SELECT * FROM {$this->table} ORDER BY `date` DESC LIMIT $offset, $limit";
$table = $wpdb->get_results( $sql );
$total_users = count_users();
//{$this->table}
$week = $wpdb->get_var( "SELECT sum( `count` ) FROM `{$this->table}` WHERE `date` >= ( DATE_SUB( CURRENT_DATE, INTERVAL 7 DAY ) )" );
$month = $wpdb->get_var();
$six_month = $wpdb->get_var();
$year = $wpdb->get_var();
//var_dump( $total_users);
//update_user_meta( $userdata->ID, 'last_login', '' );
//var_dump( $userdata->last_login );
?>
<div class="wrap">
<h2><?php _e( 'User Login Statistics' ); ?></h2>
<table class="widefat">
<thead>
<tr valign="top">
<th scope="col"><?php _e( 'Date' ); ?></th>
<th scope="col"><?php _e( 'Count' ); ?></th>
</tr>
</thead>
<?php
if( $table ) {
foreach ($table as $row) {
?>
<tr>
<td><?php echo $row->date; ?></td>
<td><?php echo $row->count; ?></td>
</tr>
<?php
} //foreach
} else {
?>
<tr>
<td colspan="7"><?php _e( 'Nothing found' ); ?></td>
</tr>
<?php } ?>
</table>
</div>
<?php
$total = $wpdb->get_var( "SELECT COUNT(`id`) FROM {$this->table}" );
$num_of_pages = ceil( $total / $limit );
$page_links = paginate_links( array(
'base' => add_query_arg( 'pagenum', '%#%' ),
'format' => '',
'prev_text' => __( '«', 'aag' ),
'next_text' => __( '»', 'aag' ),
'total' => $num_of_pages,
'current' => $pagenum
) );
if( $page_links ) {
echo '<div class="tablenav"><div class="tablenav-pages" style="margin: 1em 0">' . $page_links . '</div></div>';
}
}
}
$online_stats = new User_Login_Stats();
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