original_string: public function url_to_id($url){
      if ( $file = $this->url_to_real($url) ){
        return $this->real_to_id($file);
      }
      return false;
    }
code: public function url_to_id($url){
      if ( $file = $this->url_to_real($url) ){
        return $this->real_to_id($file);
      }
      return false;
    }
code_tokens: public function url_to_id ( $ url ) { if ( $ file = $ this -> url_to_real ( $ url ) ) { return $ this -> real_to_id ( $ file ) ; } return false ; }
docstring: Returns the file's ID from its URL
  
  @param string $url The file's URL
  @return bool|string
docstring_tokens: Returns the file s ID from its URL