composer 一

<code>touch composer<span>.json</span>
vim composer<span>.json</span></code>

<code><span>"require"</span>:{
                <span>"monolog/monolog"</span>:<span>"1.2.*"</span>
                }

}
</code>

<code>root<span>@66</span>f625feefa3:~<span># ls</span>
composer<span>.json</span>  composer<span>.lock</span>  vendor</code>

<code><span><span><?php</span><span>require</span><span>'/root/vendor/autoload.php'</span>;
<span>$log</span> = <span>new</span> Monolog\Logger(<span>'name'</span>);
<span>$log</span>->pushHandler(<span>new</span> Monolog\Handler\StreamHandler(<span>'app.log'</span>, Monolog\Logger::WARNING));

<span>$log</span>->addWarning(<span>'Foo'</span>);

<span>?></span></span></code>

<code>root<span>@66</span>f625feefa3:~<span># ls</span>
app<span>.log</span>  composer<span>.json</span>  composer<span>.lock</span>  test<span>.php</span>  test1<span>.php</span>  vendor
</code>