title: convert a string url friendly slug in local language
body: <p>I want to convert a user input string into url friendly slug in my local language.</p>
  
  <p>I have used laravel 5.2 and tried to use <code>str_slug($request-&gt;input('title'))</code>.</p>
  
  <p>It can convert english string to slug  but for local language it returns empty string. My input will be in Bangla language.</p>
  
  <p>Using <code>$request-&gt;input('title')</code>. I get bangla text but could not convert it into url friendly slug.</p>
  
  <p>How can I solve this?</p>
  
  <p>Thanks.</p>