private static function connect()
{
self::$connection = $connection = fsockopen(self::$smtp, self::$port);
if ($connection) {
fgets($connection);
//必须要获取一次，否则下次读取的是上一次的值
self::write('HELO ' . self::$smtp . "\r\n", 250);
self::write("auth login \r\n", 334);
self::write(base64_encode(self::$user) . "\r\n", 334);
self::write(base64_encode(self::$pwd) . "\r\n", 235);
} else {
exit('请检查邮件类成员属性是否正确');
}
}
