failed when install laravel and start artisan server -

When I try (before I get an error installing Laurel, but I forgot what the error was

I get this error

  requires the Mcrypt PHP extension     
  P> I'm really sure that I have installed php5-mcrypt, and some people recommend putting mcrypt.ini in / etc / php5 / mods-available  
 < Code> sudo ln -s / etc / php5 / conf.d / mcrypt.ini / etc / php5 / mods-available sudo php5enmod mcrypt sudo service apache2 restart   
 But I have found that in the folder I can not find mcrypt.ini   
 
 < P> Just check the folder / etc / php5 / mods- - Available mcrypt.ini.dpkg-new file, you need to rename or copy this file to the current directory with the name mcrypt.ini, and the server Start or Laverne