title: Composer does not install
body: <p>I am trying running laravel in my computer, but I have some difficults to install this resource in my machine, follow below a little bit of error in terminal of linux</p>
  
  <blockquote>
    <p>All settings correct for using Composer<br>
    Downloading...<br>
    Could not create file /var/www/html/composer.phar: fopen(/var/www/html/composer.phar): failed to open stream: Permission denied<br>
    Download failed: fopen(/var/www/html/composer.phar): failed to open stream: Permission denied
    fwrite() expects parameter 1 to be resource, boolean given<br>
    Downloading...<br>
    Could not create file /var/www/html/composer.phar: fopen(/var/www/html/composer.phar): failed to open stream: Permission denied<br>
    Download failed: fopen(/var/www/html/composer.phar): failed to open stream: Permission denied<br>
    fwrite() expects parameter 1 to be resource, boolean given<br>
    Downloading...<br>
    Could not create file /var/www/html/composer.phar: fopen(/var/www/html/composer.phar): failed to open stream: Permission denied<br>
    Download failed: fopen(/var/www/html/composer.phar): failed to open stream: Permission denied<br>
    fwrite() expects parameter 1 to be resource, boolean given<br>
    The download failed repeatedly, aborting.<br>
    alexander@alexander:/var/www/html$ </p>
  </blockquote>