PHP实现PDF

. 今天在做合同签章时，需要导出PDF，因此，我就引入了tcpdf。直接上代码如下:

 /**
     * 详情&&打印
     * @param $params
     * @return array
     */
    public function detail($params)
    {
        $first = DB::table('contract_file as f')->select('f.*', 'c.name','c.desc')
            ->leftJoin('contract_template_category as c','f.template_id','=','c.id')
            ->where('c.id',$params['id'])
            ->first();
        if(!$first || empty($first->desc)){
            return ['msg'=>'合同不存在','status'=>false];
        }
        $content = htmlspecialchars_decode($first->desc,ENT_QUOTES);

        $emp = DB::table('employees as e')->where('e.uuid',$first->account_uuid)
            ->select('fullName', 'employeeID', 's.name as sub_company_name',
                'd.deptName', 'des.designation', 'l.job_level_name',
                'employees_status', 'employees_type', 'joiningDate',
                'conversion_date', 'contract_period', 'contract_end',
                'id_type', 'id_card', 'gender',
                'marital_status', 'culture_type', 'permanent_type',
                'registered_residence', 'nation', 'mobileNumber',
                'e.company_email as emp_company_email','e.email as emp_email','localAddress',
                'c.company_name','address','c.name as company_relation_name','contact',
                'c.email as company_email'
            )
            ->leftJoin('companies as c','c.id','=','e.company_id')
            ->leftJoin('designation as des','des.id','=','e.designation')
            ->leftJoin('department as d','d.id','=','e.deptid')
            ->leftJoin('employees_job_level as l','l.id','=','e.job_level_id')
            ->leftJoin('sub_companies as s','s.id','=','e.company_branch_id')
            ->first();



        //获取所有的标签
        //$ids = ContractDynamicField::pluck('id')->toArray();
        $labels = ContractDynamicField::pluck('label')->toArray();
        $titles = ContractDynamicField::pluck('title')->toArray();

        //$id_labels = array_combine($labels, $ids);
        $title_labels = array_combine($labels, $titles);
        $new_content = $content;
        preg_match_all('/\{.*?\}/i', $content, $matches);


        $keyVal = $this->labelKey();
        $valKey  = array_flip($keyVal);
        $label_value_arr = array();
        foreach ($title_labels as $tk=>$title){
            if(isset($valKey[$title])){
                $k = $valKey[$title];
                $label_value_arr[$tk] = $emp->$k;
            }
        }

        //获取标签对应的ID
        if (!empty($matches[0])) {

            foreach ($matches[0] as $match) {
                try {
                    if (!in_array($match, $labels)) {
                        return ['status' => false, 'msg' => trans('service.20540')];//您用了系统里没有的标签
                    }

                    //替换
                    if (isset($label_value_arr[$match])) {
                        $new_content = str_replace($match, $label_value_arr[$match], $new_content);
                    }

                } catch (\Exception $exception) {
                    return ['status' => false, 'msg' => trans('service.20096')];//保存到数据库出错
                }

            }
        }

        $title = $first->code;//标题
        $html = $new_content;//内容

        if($params['is_export']==1){
            return $this->downloadPDF($html,$title);

        }

        return $html;
    }

. 导出PDF

/**
     * @param $html
     * @param $title
     * return mixed
     */
    public function downloadPDF($html,$title)
    {

        $pdf = new \TCPDF();
        // 设置文档信息
        //$pdf->SetCreator(PDF_CREATOR);
        //$pdf->SetAuthor('这里是作者');
        //$pdf->SetTitle('这里是标题');
        //$pdf->SetSubject('这里是主题');
        //$pdf->SetKeywords('这里是关键字');

        // 设置页眉和页脚信息
        $pdf->SetHeaderData('', 30, '', '', [0, 64, 255], [0, 64, 128]);
        $pdf->setFooterData([0, 64, 0], [0, 64, 128]);

        // 设置页眉和页脚字体
        $pdf->setHeaderFont(['stsongstdlight', '', '10']);
        $pdf->setFooterFont(['helvetica', '', '8']);

        // 设置默认等宽字体
        $pdf->SetDefaultMonospacedFont('courier');

        // 设置间距
        $pdf->SetMargins(15, 15, 15);//页面间隔
        $pdf->SetHeaderMargin(5);//页眉top间隔
        $pdf->SetFooterMargin(10);//页脚bottom间隔
        $pdf->setCellPaddings('',5,'',5);//设置上下左右间距

        // 设置分页
        $pdf->SetAutoPageBreak(true, 25);
        $pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

        // set default font subsetting mode
        $pdf->setFontSubsetting(true);

        //设置字体 stsongstdlight支持中文
        $pdf->SetFont('stsongstdlight', '', 14);

        //设置加密和密码
        //$pdf->SetProtection($permissions = array('print', 'modify', 'copy', 'annot-forms', 'fill-forms', 'extract', 'assemble', 'print-high'), $user_pass = '123456', $owner_pass = null, $mode = 0, $pubkeys = null );

        //换行符
        $pdf->Ln(5);

        //第一页
        $pdf->AddPage();

        //设置文本背景阴影
        $pdf->setTextShadow(array('enabled' => true, 'depth_w' => 0.2, 'depth_h' => 0.2, 'color' => array(196, 196, 196), 'opacity' => 1, 'blend_mode' => 'Normal'));

        // Print text using writeHTMLCell()
        $pdf->writeHTMLCell(0, 10, '', '', $html, 0, 1, 0, true, '', true);

        //标题
        $title = $title.'.pdf';

        //输出PDF
        $pdf->Output($title, 'D');//默认是I：在浏览器中打开，D：下载，F：在服务器生成pdf ，S：只返回pdf的字符串
    }
    ```