parsing - Parse valid html (php - tidy) -

I want to use a clean plugin but only for one string The code I am using is:

  tidy_repair_string ($ string);   
 My problem is that this script is in a file, which I have to use once to include it.  
 But the streamlined duplicate HTML, body, title tag (normal  
 example: if my string  and  gt;   
; & lt; / b & gt;  Only me  & lt; b & gt; & lt; s & gt; Text & lt; / s & gt; & lt; / b &   
  No:   
  & lt ;! DOCTYPE html public "- // W3C // DTD HTML 3.2 / EN ">  gt; Top & gt; Title & gt; & lt; / title & gt; & lt; / head & gt; & gt; Body & gt; & lt; Lt; p & gt; & lt; c & gt; Text       
 Thank you!   
 
 
 Maybe it works If not, look for more options  
  $ string = tidy_repair_string ($ string, array ('output-html' = & gt; wrong, 'doctype' = & gt; wrong ));