title: Is there any function in Codeigniter to find substring
body: <p>I have searched a lot for this but I am unable to find that if there is any function like <code>substr()</code> in Codeigniter to find characters from starting till 6 letters of the string.<br>
  We can do this by core PHP function <code>substr($message,0,6)</code>, but is there some inbuit function like this in Codeigniter?</p>