codeigniter 3 中的 Mpdf 问题

Question

我正在使用 codeigniter 3 开发一个项目，我使用的是 mpdf v5.6。 mpdf 示例运行完美，但是当我将 mpdf 与 codeigniter 3 集成时，它会抛出一些错误。我的控制器代码是

public function pdf()
    {
        $this->load->library('mpdf');
        $this->mpdf->WriteHTML('<p>Hello There</p>');
        $this->mpdf->Output();
    }

错误一样

A PHP Error was encountered

Severity: 8192

Message: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead

Filename: includes/functions.php

Line Number: 74 
Backtrace:

File: /Users/bappa/Desktop/codeigniter/mpdf/includes/functions.php
Line: 74
Function: preg_replace

File: /Users/bappa/Desktop/codeigniter/application/libraries/Mpdf.php
Line: 31062
Function: strcode2utf

File: /Users/bappa/Desktop/codeigniter/application/libraries/Mpdf.php
Line: 12302
Function: purify_utf8

File: /Users/bappa/Desktop/codeigniter/application/controllers/Welcome.php
Line: 29
Function: WriteHTML

File: /Users/bappa/Desktop/codeigniter/index.php
Line: 292
Function: require_once

并在错误页面的末尾

mPDF error: Some data has already been output to browser, can't send PDF file

问题出在哪里？谢谢。

Answer 1

打开导致错误的那一行。我认为错误行是这样的，

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

将这些行替换为，

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

在 github

中查看此问题

codeigniter 3 中的 Mpdf 问题

Mpdf issue in codeigniter 3

php

codeigniter

pdf-generation

mpdf

codeigniter-3