WordPress非插件禁止多人同时登录一个账号

关于 WordPress 禁止多个人同时登录一个用户账号，可以使用插件Prevent Concurrent Logins、 Wp Single Login来实现，

Wp Single Login是通过wordpress3.6新增的Heartbeat API来实现的。

纯代码菜鸟可后台插件安装界面搜索 Wp Single Login在线安装

直接安装启用即可，不需要设置。

小伙伴不想用插件或想自定义某些代码，下面就是该插件的源代码(添加到funtion文件里面，使用方法不再叙述)：

< ?php/*Plugin name: WP Single LoginPlugin URI: http://magnigenie.com/wp-single-login/Description: This plugin will automatically logout the already logged in user when a user with the same login details tries to login from different browser or different computer. This plugin needs zero configuration to run. Just install it if you want single login functionality on your site.Version: 1.0Author: Nirmal RamAuthor URI: http://magnigenie.com/about-me/License: GPLv2 or laterLicense URI: http://www.gnu.org/licenses/gpl-2.0.html*/if( !class_exists( 'wp_single_login' ) ) { class wp_single_login { private $session_id; function __construct() { if ( ! session_id() ) session_start(); $this->session_id = session_id(); add_action( 'init', array( $this, 'wpsl_init' ) ); add_action( 'wp_login', array( $this, 'wpsl_login' ), 10, 2 ); add_filter('heartbeat_received', array( $this, 'wpsl_heartbeat_received' ), 10, 2); add_filter('heartbeat_nopriv_received', array( $this, 'wpsl_heartbeat_received' ), 10, 2); add_filter( 'login_message', array( $this, 'wpsl_loggedout_msg' ), 10 ); } function wpsl_init() { if( ! is_user_logged_in() ) return; //enqueue the Heartbeat API wp_enqueue_script('heartbeat'); wp_enqueue_script('jquery'); //load our Javascript in the footer add_action("wp_footer", array( $this, 'wpsl_scripts' ) ); $user_sess_id = get_user_meta( get_current_user_id(), '_wpsl_hash', true ); if( $user_sess_id != $this->session_id ) { wp_logout(); wp_redirect( site_url( 'wp-login.php?wpsl=loggedout' ) ); exit; } } function wpsl_login( $user_login, $user ) { update_user_meta( $user->ID, '_wpsl_hash', $this->session_id ); return; } function wpsl_loggedout_msg() { if ( isset($_GET['wpsl']) && $_GET['wpsl'] == 'loggedout' ) { $msg = __( "Your session has been terminated as you are logged in from another browser." ) ; $message = '
'.$msg.'

'; return $message; } }function wpsl_heartbeat_received($response, $data) { $user_sess_id = get_user_meta( get_current_user_id(), '_wpsl_hash', true ); if( $data['user_hash'] && $data['user_hash'] != $user_sess_id ){ $response['wpsl_response'] = 1; wp_logout(); } else $response['wpsl_response'] = 0; return $response;} function wpsl_scripts() { ?>< ?php} } new wp_single_login();}