original_string: private function sanitize($st){
      $st = trim((string)$st);
      if ( strpos($st, ';') !== false ){
        return '';
      }
      if ( strpos($st, '<') !== false ){
        return '';
      }
      if ( strpos($st, '"') !== false ){
        return '';
      }
      if ( strpos($st, "'") !== false ){
        return '';
      }
      return $st;
    }
code: private function sanitize($st){
      $st = trim((string)$st);
      if ( strpos($st, ';') !== false ){
        return '';
      }
      if ( strpos($st, '<') !== false ){
        return '';
      }
      if ( strpos($st, '"') !== false ){
        return '';
      }
      if ( strpos($st, "'") !== false ){
        return '';
      }
      return $st;
    }
code_tokens: private function sanitize ( $ st ) { $ st = trim ( ( string ) $ st ) ; if ( strpos ( $ st , ';' ) !== false ) { return '' ; } if ( strpos ( $ st , '<' ) !== false ) { return '' ; } if ( strpos ( $ st , '"' ) !== false ) { return '' ; } if ( strpos ( $ st , "'" ) !== false ) { return '' ; } return $ st ; }
docstring: This function is used to sanitize the strings which are given as parameters
  @param string $st
  @return string The the header url part to be executed
docstring_tokens: This function is used to sanitize the strings which are given as parameters