无法解决您的要求：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以下错误时。我的错误是什么......请告诉我......

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/"
        }
    }

我也试过了：

composer require barryvdh/laravel-dompdf

但它显示以下错误：

错误：使用版本 ^0.8.0 用于 barryvdh/laravel-dompdf ./composer.json 已更新正在加载包含包信息的作曲家存储库

更新依赖（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

您的需求无法解析为一组可安装的软件包。

Answer 1

由于您在运行 composer require barryvdh/laravel-dompdf 时遇到 Permission denied 错误，因此应该使用以下命令来修复它们：

chown -R $USER ~/.composer

或：

sudo chown -R $USER ~/.composer

然后清除 Composer 缓存：

composer clear

之后尽量避免使用sudo 运行composer 命令，以免破坏文件权限。

如果仍然有任何问题，为了排除故障，请运行以下 shell 命令：

composer diagnose

Answer 2

你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"

无论如何是laravel-dompdf:(v0.8.0)的当前版本

Answer 3

安装应该使用当前版本的 dompdf

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