composerでcakephpインストールしたが、autoloadがない

Question

 Problem 1
    - cakephp/cakephp 3.4.5 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.4.4 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.4.3 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.4.2 requires lib-icu >=4.8 -> the requested linked library icu has the wrong version installed or is missing from your system, make sure to have the extension providing it.
    - cakephp/cakephp 3.4.1 requires lib-icu >=4.8 -> the requested linked library icu has the wrong version installed or is missing from your system, make sure to have the extension providing it.
    - cakephp/cakephp 3.4.0 requires lib-icu >=4.8 -> the requested linked library icu has the wrong version installed or is missing from your system, make sure to have the extension providing it.
    - Installation request for cakephp/cakephp 3.4.* -> satisfiable by cakephp/cakephp[3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.5].```

上記のようなエラーが出で、autoload.phpが入っておらずemptyにのみなっています。

ちなみにですが、下記のコマンドを実行すると当然ですが下記のエラーが出ます。



PHP Warning:  require(/property/japan-property/vendor/autoload.php): failed to open stream: No such file or directory in /property/japan-property/bin/cake.php on line 31
PHP Fatal error:  require(): Failed opening required '/property/japan-property/vendor/autoload.php' (include_path='.:/usr/share/pear:/usr/share/php') in /property/japan-property/bin/cake.php on line 31


以上 宜しくお願いします。

Answer 1

エラーメッセージを読んでください。
ext-intl と lib-icu がインストールされていないため先に進めないのです。

Answer 2

エラーをよく読みましょう。PHP に intl extension が入っていないためにエラーになっています。
php-intlをインストールしてください。