您的要求無法解決：無法打開流：權限被拒絕

Question

我需要在我的項目中安裝DomPDf。所以，我添加「barryvdh/laravel-dompdf」：「v0.7.0」，作曲家需要阻止。當我更新錯誤以後的作曲家顯示。請告訴我我的錯誤....請指定要我..

終端錯誤

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. 

我作曲代碼

{ 
    "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/" 
     } 
    } 

我也試過：

composer require barryvdh/laravel-dompdf 

但它顯示以下錯誤：

Error : Using version ^0.8.0 for barryvdh/laravel-dompdf ./composer.json has been updated Loading composer repositories with package information

Updating dependencies (including require-dev)

file_put_contents(/home/w3cert/.composer/cache/repo/https---‌​packagist.org/p-prov‌​ider-2017-01.json): failed to open stream: Permission denied

packagist.org could not be fully loaded, package information was loaded from the local cache and may be out of date

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

Answer 1

安裝應與DOMPDF當前版本的工作

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

Answer 2

你爲什麼不嘗試在命令行

composer require barryvdh/laravel-dompdf 

---

安裝請在安裝前從composer.json中刪除此行。

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

反正laravel-dompdf當前版本（v0.8.0）

Answer 3

既然你已經有了運行composer require barryvdh/laravel-dompdf當權限被拒絕錯誤，這是一個應該解決這些命令：

chown -R $USER ~/.composer 

或：

sudo chown -R $USER ~/.composer 

然後清除緩存作曲：

composer clear 

比後儘量避免與運行sudocomposer命令不會破壞文件的權限。

如果還有任何問題，爲了排除故障，運行以下shell命令：

composer diagnose