code: public function fromFile($fromfile)
      {
          if (!file_exists($fromfile)) {
              throw new Exception("Fichier d'import non trouvé: $fromfile", self::IMPORT_FILENOTFOUND);
          }
          
          $this->fromfile = $fromfile;
          
          $resource = fopen($fromfile, "r");
          if ($resource === false) {
              throw new Exception("Erreur de lecture de $fromfile", self::IMPORT_READ_ERROR);
          }
          
          $this->setResource($resource);
          
          return $this;
      }
docs: Lecture d'un fichier
  
  @param $localFilename
  
  @return $this
  @throws Exception