您的要求无法解决：无法打开流：权限被拒绝

Question

我需要在我的项目中安装DomPDf。所以，我将“barryvdh / laravel-dompdf”：“v0.7.0”添加到composer require块。当我更新作曲家显示跟随错误。什么是我的错误....请指定给我..

终端错误

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - dompdf/dompdf v0.7.0-beta3 requires phenx/php-font-lib 0.4.* -> no matching package found.
    - dompdf/dompdf v0.7.0-beta2 requires phenx/php-font-lib 0.4.* -> no matching package found.
    - dompdf/dompdf v0.7.0-beta requires phenx/php-font-lib 0.3.* -> no matching package found.
    - dompdf/dompdf v0.7.0 requires phenx/php-font-lib 0.4.* -> no matching package found.
    - dompdf/dompdf 0.7.x-dev requires phenx/php-font-lib 0.5.* -> no matching package found.
    - barryvdh/laravel-dompdf v0.7.0 requires dompdf/dompdf ^0.7 -> satisfiable by dompdf/dompdf[0.7.x-dev, v0.7.0, v0.7.0-beta, v0.7.0-beta2, v0.7.0-beta3].
    - Installation request for barryvdh/laravel-dompdf v0.7.0 -> satisfiable by barryvdh/laravel-dompdf[v0.7.0].

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.

我的作曲家代码

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "minimum-stability" : "dev",
    "prefer-stable": true,
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=5.6.4",
        "barryvdh/laravel-debugbar": "^2.3",
"barryvdh/laravel-dompdf": "v0.7.0",
        "laravel/framework": "5.4.*",
        "laravel/tinker": "~1.0",
        "uxweb/sweet-alert": "^1.4" 
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~5.0"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    }

我也尝试过：

composer require barryvdh/laravel-dompdf

但它显示以下错误：

错误：使用版本^ 0.8.0 for barryvdh / laravel-dompdf ./composer.json已更新使用包信息加载composer存储库

更新依赖项（包括require-dev）

file_put_contents（/home/w3cert/.composer/cache/repo/https --- packagist.org/p-prov ider-2017-01.json）：无法打开流：权限被拒绝

packagist.org无法完全加载，包信息是从本地缓存加载的，可能已过期

您的要求无法解析为可安装的软件包集。

Answer 1

为什么不尝试从命令行安装它

composer require barryvdh/laravel-dompdf

---

请在安装前从composer.json中删除此行。

"barryvdh/laravel-dompdf": "v0.7.0"

无论如何当前版本的laravel-dompdf：（v0.8.0）

Answer 2

由于您在运行composer require barryvdh/laravel-dompdf时遇到了Permission denied错误，因此这是应该修复它们的命令：

chown -R $USER ~/.composer

要么：

sudo chown -R $USER ~/.composer

然后清除Composer缓存：

composer clear

之后尝试避免使用composer运行sudo命令以不破坏文件权限。

如果仍有任何问题，请进行故障排除，运行以下shell命令：

composer diagnose

Answer 3

安装应该与当前版本的dompdf一起使用

"barryvdh/laravel-dompdf": "^0.8.0"