21895
Amazon
LinuxでAWSチュートリアルに沿って、LAMPを環境後、composerをインストールしましたが、cakeのプロジェクトを作成して、以下のエラーのようなものがでてきました。  
ブラウザで確認しても、真っ白な状態になっています。  
何かCakephp3のチュートリアルにのっていないパッケージが必要になりますか？

```

    composer create-project --prefer-dist cakephp/app cake3
    Installing cakephp/app (3.2.0)
    - Installing cakephp/app (3.2.0)
    Loading from cache
    
    Created project in cake3
    Loading composer repositories with package information
    Installing dependencies (including require-dev)
    Your requirements could not be resolved to an installable set of packages.
    
    Problem 1
    - cakephp/cakephp 3.2.x-dev requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - cakephp/cakephp 3.2.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - cakephp/cakephp 3.2.0-RC1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - cakephp/cakephp 3.2.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - Installation request for cakephp/cakephp ~3.2 -> satisfiable by cakephp/cakephp[3.2.0, 3.2.0-RC1, 3.2.1, 3.2.x-dev].
    
    To enable extensions, verify that they are enabled in those .ini files:
    - /etc/php.ini
    - /etc/php-5.6.d/20-bz2.ini
    - /etc/php-5.6.d/20-calendar.ini
    - /etc/php-5.6.d/20-ctype.ini
    - /etc/php-5.6.d/20-curl.ini
    - /etc/php-5.6.d/20-dom.ini
    - /etc/php-5.6.d/20-exif.ini
    - /etc/php-5.6.d/20-fileinfo.ini
    - /etc/php-5.6.d/20-ftp.ini
    - /etc/php-5.6.d/20-gettext.ini
    - /etc/php-5.6.d/20-iconv.ini
    - /etc/php-5.6.d/20-intl.ini
    - /etc/php-5.6.d/20-mysqlnd.ini
    - /etc/php-5.6.d/20-pdo.ini
    - /etc/php-5.6.d/20-phar.ini
    - /etc/php-5.6.d/20-posix.ini
    - /etc/php-5.6.d/20-shmop.ini
    - /etc/php-5.6.d/20-simplexml.ini
    - /etc/php-5.6.d/20-sockets.ini
    - /etc/php-5.6.d/20-sqlite3.ini
    - /etc/php-5.6.d/20-sysvmsg.ini
    - /etc/php-5.6.d/20-sysvsem.ini
    - /etc/php-5.6.d/20-sysvshm.ini
    - /etc/php-5.6.d/20-tokenizer.ini
    - /etc/php-5.6.d/20-xml.ini
    - /etc/php-5.6.d/20-xmlwriter.ini
    - /etc/php-5.6.d/20-xsl.ini
    - /etc/php-5.6.d/20-zip.ini
    - /etc/php-5.6.d/30-mysql.ini
    - /etc/php-5.6.d/30-mysqli.ini
    - /etc/php-5.6.d/30-pdo_mysql.ini
    - /etc/php-5.6.d/30-pdo_sqlite.ini
    - /etc/php-5.6.d/30-wddx.ini
    - /etc/php-5.6.d/30-xmlreader.ini
    - /etc/php-5.6.d/40-json.ini
    - /etc/php-5.6.d/php.ini
    You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
    
```

`bin/cake server`と打つと、

```

    PHP Warning:  require(/var/www/html/cake3/vendor/autoload.php): failed to open stream: No such file or directory in /var/www/html/cake3/config/bootstrap.php on line 23
    PHP Fatal error:  require(): Failed opening required '/var/www/html/cake3/vendor/autoload.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/cake3/config/bootstrap.php on line 23
    
```

とエラーがでます。
CC BY-SA 3.0
2016-02-09T07:48:32.670
21894
2016-02-09T08:26:23.393
10980
question
cakephp
cakephp3をcomposerでインストールする
>
```

>     Problem 1
>     - cakephp/cakephp 3.2.x-dev requires ext-mbstring * -> the requested PHP
> extension mbstring is missing from your system.
>     - cakephp/cakephp 3.2.1 requires ext-mbstring * -> the requested PHP
> extension mbstring is missing from your system.
>     - cakephp/cakephp 3.2.0-RC1 requires ext-mbstring * -> the requested PHP
> extension mbstring is missing from your system.
>     - cakephp/cakephp 3.2.0 requires ext-mbstring * -> the requested PHP
> extension mbstring is missing from your system.
>  
```

PHPのmbstring拡張がインストールされていないようです。

```

    sudo yum install php56-mbstring
    
```

を実行してmbstring拡張をインストールし、cakephpをインストールしたディレクトリ（`/var/www/html/cake3/`）内で
`composer install` を実行してみてください。
CC BY-SA 3.0
2016-02-09T08:26:23.393
21895
2016-02-09T08:26:23.393
8000
21894
answer