Codeigniter mpdf错误-preg_replace（）：不推荐使用/e修饰符，请改用preg_replace_回调

我正在使用MPDF在codeigniter中生成pdf文件

我的控制器功能看起来像

   function save_pdf($std_id)
   {
     $data['section1_report']= $this->common_model->get_details('tbl_section1',array('id'=>$std_id));
     $html = $this->load->view('reports/section1',$data,true);
      // print_r($html);exit; 
     $this->load->library('pdf');
     $pdf = $this->pdf->load();
     $pdf->WriteHTML($html);
     $pdf->Output();
}

我的

pdf

库是

 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
   class pdf {    
      function pdf()
      {
         $CI = & get_instance();
         log_message('Debug', 'mPDF class is loaded.');
      }

     function load($param=NULL)
     {
         include_once APPPATH.'/mpdf/mpdf.php';         
         if ($params == NULL)
         {
             $param = '"en-GB-x","A4","","",10,10,10,10,6,3';         
         }         
       return new mPDF($param);
     }
  }

---

尝试将
functions.php
的第79行和第80行替换为：

$str = preg_replace_callback('/\&\#([0-9]+)\;/m', function($m) use ($lo){return code2utf($m[1],$lo); }, $str);
$str = preg_replace_callback('/\&\#x([0-9a-fA-F]+)\;/m', function($m) use ($lo){return codeHex2utf($m[1],$lo);}, $str);

来源：
我替换了这些行：

   $str = preg_replace('/\&\#([0-9]+)\;/me', "code2utf('\\1',{$lo})",$str);
   $str = preg_replace('/\&\#x([0-9a-fA-F]+)\;/me', "codeHex2utf('\\1',{$lo})",$str);

使用以下行：

   $str = preg_replace_callback('/\&\#([0-9]+)\;/m', function($m) use ($lo){return code2utf($m[1],$lo); }, $str);
   $str = preg_replace_callback('/\&\#x([0-9a-fA-F]+)\;/m', function($m) use ($lo){return codeHex2utf($m[1],$lo);}, $str);

它工作正常。
我刚在谷歌上搜索了“带Codeigniter的MPDF”，试试看，例如，这一款适合我。我使用了这个解决方案。它肯定会删除错误，但会使pdf损坏。但是当我评论你要求评论的那行时，它会为你的改变而欢呼！
$str = preg_replace('/\&\#([0-9]+)\;/me', "code2utf('\\1',{$lo})",$str);
$str = preg_replace('/\&\#x([0-9a-fA-F]+)\;/me', "codeHex2utf('\\1',{$lo})",$str);
// Remove above and add below code in includes/functions.php
$str = preg_replace_callback('/\&\#([0-9]+)\;/m', function($m) use ($lo){return code2utf($m[1],$lo); }, $str);
$str = preg_replace_callback('/\&\#x([0-9a-fA-F]+)\;/m', function($m) use ($lo){return codeHex2utf($m[1],$lo);}, $str);

// Also comment below line in mpdf.php
$html = preg_replace('/\{DATE\s+(.*?)\}/e',"date('\\1')",$html );

$str = preg_replace('/\&\#([0-9]+)\;/me', "code2utf('\\1',{$lo})",$str);
$str = preg_replace('/\&\#x([0-9a-fA-F]+)\;/me', "codeHex2utf('\\1',{$lo})",$str);
// Remove above and add below code in includes/functions.php
$str = preg_replace_callback('/\&\#([0-9]+)\;/m', function($m) use ($lo){return code2utf($m[1],$lo); }, $str);
$str = preg_replace_callback('/\&\#x([0-9a-fA-F]+)\;/m', function($m) use ($lo){return codeHex2utf($m[1],$lo);}, $str);

// Also comment below line in mpdf.php
$html = preg_replace('/\{DATE\s+(.*?)\}/e',"date('\\1')",$html );