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nvm 常用命令

首先安装mpdf composer require mpdf/mpdf

public function testpdf(Request $request){

        $mpdf = new Mpdf(['tempDir'=>runtime_path().'/pdftmp']);

        $mpdf->autoScriptToLang = true;  
        $mpdf->autoLangToFont = true; 

        $html = <<<EOD
        <h1 style='text-align:center;'>Hello World你好啊</h1>
EOD;

        $mpdf->WriteHTML($html);
        //public_path().'/pdf/'

        $file = public_path().'/pdf/'.time().'.pdf';
        $mpdf->Output($file,'F');

        return response()->download($file, time().'.pdf');
    }

生成结果

1.SELECT CONVERT_TZ(create_time, 'UTC', 'MET') AS local_time FROM la_test limit 1

2.SELECT CONVERT_TZ(create_time, '+00:00', '+08:00') AS local_time FROM la_test limit 1

使用第一种方式可能会导致响应为NULL，可以使用第二种方式

1.查询可用时区列表
timedatectl list-timezones

2.设置为UTC时区
sudo timedatectl set-timezone UTC

3.同步时区
apt install ntpdate

sudo ntpdate cn.pool.ntp.org

查看当前时间

date -R