title: Laravel's array_sort helper DESC e ASC
body: <p>I want to sort a multidimensionl array by one or more keys using the Laravel helper <code>array_sort</code>.</p>
  
  <pre><code>array(
      array('firstname_1','lastname_1'),
      array('firstname_2','lastnmae_2')
  )
  </code></pre>
  
  <p>I want to order it first by firstname and then by lastname.</p>
  
  <p>I also want to do this in DESC or ASC order. How can I achieve this?</p>
  
  <p>There are functions aivalable in the internet to do this but I would like to understand how to use the Laravel helper. The doc for array_sort (<a href="http://laravel.com/docs/helpers#arrays" rel="noreferrer">http://laravel.com/docs/helpers#arrays</a>) I don't find comprehensive.</p>