Yii2 中实现单点登录的方法

<?php// Session 跨域$host = explode('.', $_SERVER["HTTP_HOST"]);if (count($host) > 2) {  define('DOMAIN', $host[1] . '.' . $host[2]);} else {  define('DOMAIN', $host[0] . '.' . $host[1]);}

<?php'user' => [  'identityClass' => 'common/models/User',  'enableAutoLogin' => true,  'identityCookie' => ['name' => '_identity', 'httpOnly' => true, 'domain' => '.'.DOMAIN],],'session' => [  'cookieParams' => ['domain' => '.'.DOMAIN, 'lifetime' => 0],  'timeout' => 3600,],

<?php//设置Yii::$app->session['var']='value';//使用echo Yii::$app->session['var'];//移除unset(Yii::$app->session['var']);