摘要： fp = fopen($filename, 'r'); } //在每次迭代之前初始化某些操作 public function rewind() { rewind($this->fp); $this->cur = fgets($this->fp); $this->nxt = fgets($this->fp); return true; } //获取当前元素的键 public function key() { return $this->lineCount++; } ... 阅读全文