前提・実現したいこと
Laravelをインストールしたいのですがコマンドプロンプトでエラーが出力されます。
Windows10でXamppをインストールしてPHP環境を設定しました。そして、Composerのインストールを済ませました。
発生している問題・エラーメッセージ
composer global require "laravel/installer=~1.1"
を実行すると、下記エラーが出力されます。
Changed current directory to C:/Users/〇〇/AppData/Roaming/Composer ./composer.json has been created Loading composer repositories with package information Updating dependencies (including require-dev) Package operations: 9 installs, 0 updates, 0 removals - Installing symfony/process (v4.0.9): Downloading (failed) Downloading (failed) Downloading (failed) Failed to download symfony/process from dist: The "https://api.github.com/repos/symfony/process/zipball/d7dc1ee5dfe9f732cb1bba7310f5b99f2b7a6d25" file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed Failed to enable crypto failed to open stream: operation failed Now trying to download from source - Installing symfony/process (v4.0.9): Cloning d7dc1ee5df [RuntimeException] Failed to clone https://github.com/symfony/process.git via https, ssh protocols, aborting. - https://github.com/symfony/process.git Cloning into 'C:\Users\〇〇\AppData\Roaming\Composer\vendor\symfony\process'... fatal: unable to access 'https://github.com/symfony/process.git/': SSL certificate problem: self signed certifica te in certificate chain - git@github.com:symfony/process.git Cloning into 'C:\Users\〇〇\AppData\Roaming\Composer\vendor\symfony\process'... Host key verification failed. fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. 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] [--] [<packages>]...
補足情報(FW/ツールのバージョンなど)
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