composer报错解决方案

下午在本地环境用composer安装GuzzleHttp时报错：

G:\AppServ\www\watch>composer require guzzlehttp/guzzle


  [Composer\Exception\NoSslException]
  The openssl extension is required for SSL/TLS protection but is not available. If you can not enable the openssl ex
  tension, you can disable this error, at your own risk, by setting the 'disable-tls' option to true.


require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-suggest] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--update-with-all-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--] []...

解决办法：

打开php.ini，找到#extension=php_openssl.dll；去掉前面的#符号，保存重启Apache。

然后继续安装时又报错：

G:\AppServ\www\watch>composer require guzzlehttp/guzzle
Using version ^6.5 for guzzlehttp/guzzle
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
The "https://repo.packagist.org/p/symfony/console.json" file could not be downloaded: failed to open stream: HTTP request failed!
https://packagist.phpcomposer.com could not be fully loaded, package information was loaded from the local cache and may be out of date

解决办法：项目目录下输入composer clear-cache

G:\AppServ\www\watch>composer clear-cache

 继续安装，仍然报错：

G:\AppServ\www\watch>composer require guzzlehttp/guzzle
Using version ^6.5 for guzzlehttp/guzzle
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)

Installation failed, reverting ./composer.json to its original content.


  [Composer\Downloader\TransportException]
  Content-Length mismatch, received 15988 bytes out of the expected 238401


require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-suggest] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--update-with-all-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--] []...

解决方法：

更换镜像，注意更换镜像不要进行全局更换的命令 而是要针对这个项目去更换镜像

所以 我们在这个项目的根目录下也就是composer.json的路径下 

针对这个项目 进行更换镜像  使用阿里云镜像：输入composer config repo.packagist composer https://mirrors.aliyun.com/composer/

G:\AppServ\www\watch>composer config repo.packagist composer https://mirrors.aliyun.com/composer/

继续安装，成功解决：

G:\AppServ\www\watch>composer require guzzlehttp/guzzle
Using version ^6.5 for guzzlehttp/guzzle
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 5 installs, 0 updates, 0 removals
  - Installing ralouphie/getallheaders (3.0.3): Downloading (100%)
  - Installing psr/http-message (1.0.1): Downloading (100%)
  - Installing guzzlehttp/psr7 (1.6.1): Downloading (100%)
  - Installing guzzlehttp/promises (v1.3.1): Downloading (100%)
  - Installing guzzlehttp/guzzle (6.5.2): Downloading (100%)
guzzlehttp/psr7 suggests installing zendframework/zend-httphandlerrunner (Emit PSR-7 responses)
Package mtdowling/cron-expression is abandoned, you should avoid using it. Use dragonmantank/cron-expression instead.
Package phpunit/phpunit-mock-objects is abandoned, you should avoid using it. No replacement was suggested.
Writing lock file
Generating autoload files
> Illuminate\Foundation\ComposerScripts::postUpdate
> php artisan optimize
Generating optimized class loader
The compiled services file has been removed.