Opens a directory entry in a zip file for reading.
A valid resource handle returned by zip_open().
A directory entry returned by zip_read().
Any of the modes specified in the documentation of fopen().
注: Currently, mode is ignored and is always "rb". This is due to the fact that zip support in PHP is read only access.
如果成功则返回 TRUE，失败则返回 FALSE。
注: Unlike fopen() and other similar functions, the return value of zip_entry_open() only indicates the result of the operation and is not needed for reading or closing the directory entry.