code: public static function toCss(string $sFile)
  	{
  	    if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
  	        
  	        $sCmd = self::LESS_WINDOWS." ".$sFile." --watch";
              $sContent = shell_exec($sCmd);
  	    }
  	    else {
  	       
  	        $sCmd = "lessc ".$sFile." --no-color 2>&1";
              $sContent = shell_exec($sCmd);
  	    }
  	    
          header("content-type:text/css");
          echo $sContent;
  	}
docs: translate the content
  
  @access public
  @param  mixed $sFile content to translate
  @return void