老师你好     求解一下     phpemail邮件发送按照你的课程一抹一样 但是在我本地环境提示错误

 Fatal error: Class 'phpmailer\PHPMailer' not found in F:\phpstudy\WWW\thinkdecorate\extend\phpmailer\Email.php on line 18 [1] ErrorException in Email.php line 18 Class 'phpmailer\PHPMailer' not found

 18行代码如下： $mail = new PHPMailer; <?php namespace phpmailer; use think\Exception; class Email{ /** * @param $to * @param $title * @param $content * @return bool */ public static function send($to,$title,$content){ date_default_timezone_set('PRC');//set time try { //Create a new PHPMailer instance //$mail = new \extend\phpmailer\PHPMailer(); $mail = new PHPMailer; //Tell PHPMailer to use SMTP $mail->isSMTP(); 

其他地方一样的 求老师帮忙 谢谢