Wordpress Minify HTML for visitors

wp_minify_html_output.func.php

/*
**  Minifier le HTML :
*/

  // Enable GZIP output compression
  if(extension_loaded("zlib") && (ini_get("output_handler") != "ob_gzhandler"))
     add_action('wp', create_function('', '@ob_end_clean();@ini_set("zlib.output_compression", 1);'));
   
  // ob_start = mise en tampon
  add_action('get_header', 'mytheme_html_minify_start');
  function mytheme_html_minify_start()  {
  	if( !isset($_GET['min']) ){
      ob_start( 'mytheme_html_minyfy_finish' );
  	}
  }
   
  // Minifier les fichiers HTML d'un site WordPress sans plugin
  if (!current_user_can('update_plugins')) { 
    function mytheme_html_minyfy_finish( $html )  {
     
       // Suppression des commentaires HTML, 
       // sauf les commentaires conditionnels pour IE
       $html = preg_replace('/<!--(?!s*(?:[if [^]]+]|!|&gt;))(?:(?!-->).)*-->/s', '', $html);
     
       // Suppression des espaces vides
       $html = str_replace(array("\r\n", "\r", "\n", "\t"), '', $html);
       while ( stristr($html, '  ')) 
           $html = str_replace('  ', ' ', $html);
     
       return $html;
    }
  }