Online PHP editor | output for mW32T

<?php class Connection { public $server, $username, $password, $db; public function __construct($server, $username, $password, $db) { $this->server = $server; $this->username = $username; $this->password = $password; $this->db = $db; } public function __sleep() { return array('server', 'username', 'password', 'db'); } public function __wakeup() { return implode(',',array( $this->server = $server,$this->username = $username, $this->password = $password, $this->db = $db); } public function a(){ echo $this->server; echo $this->username; echo $this->password; echo $this->db; } } /*$server="server1"; $username="username1"; $password="password1"; $db="db1";*/ $conect= new Connection("server1", "username1", "password1", "db1"); $conect->a(); echo $conect->__wakeup(); ?>