无法安装mpdf

Question

我已经安装了composer，现在我正在项目文件夹中安装mpdf。我执行了以下命令composer require mpdf/mpdf。在此之后，我得到以下错误：

Using version ^8.0 for mpdf/mpdf
./composer.json has been created
Running composer update mpdf/mpdf
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - mpdf/mpdf[v8.0.0, ..., v8.0.3] require php ^5.6 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 -> your php version (8.0.7) does not satisfy that requirement.
    - mpdf/mpdf[v8.0.4, ..., v8.0.7] require php ^5.6 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0 -> your php version (8.0.7) does not satisfy that requirement.
    - mpdf/mpdf[v8.0.8, ..., v8.0.9] require php ^5.6 || ^7.0 -> your php version (8.0.7) does not satisfy that requirement.
    - mpdf/mpdf[v8.0.10, ..., v8.0.12] require ext-gd * -> it is missing from your system. Install or enable PHP's gd extension.
    - Root composer.json requires mpdf/mpdf ^8.0 -> satisfiable by mpdf/mpdf[v8.0.0, ..., v8.0.12].

To enable extensions, verify that they are enabled in your .ini files:
    - C:\xampp\php\php.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Installation failed, deleting ./composer.json.

有什么解决办法吗？

Answer 1

我正在使用mpdf 8.1.2 (PHP8.1.6，Windows11Home单语言上的CodeIgniter 4.2.6 )，并遇到同样的问题。可以通过以下两个步骤解决这一问题：

(extension=gd).

• Run

1. 编辑php.ini文件并删除分号以使gd(;extension=gd)成为composer需要mpdf/mpdf v8.1.2 -W (允许当前锁定到特定版本的包进行升级、降级和删除)

Answer 2

安装php8.0-gd和php8.0-mbstring

sudo apt-get install php8.0-gd php8.0-mbstring

然后需要带有composer的mpdf库。

composer require mpdf/mpdf v8.0.10