false return

The fgets, fgetss, fread, fscanf, and fclose functions also return False on error.

fscanf和fclose函数在出错时也返回False。

If you return false from the visit() method, the children of this node won't be visited.

如果visit（）方法返回false，那么该节点的子接点将不会被访问。

Because Order knows nothing about OrderFulfillment, its equals method will always return false when passed an OrderFulfillment.

因为Order对OrderFulfillment一无所知，所以在传递OrderFulfillment时，其equals方法将总是返回false。

Finally, return false to prevent the form from being submitted.

最后，返回false来阻止表单提交。

As with fopen, file_get_contents, file, and readfile, all return False on failure to open or process the file.

如fopen函数一样，file get contents、file和readfile函数都在打开失败或处理文件失败时返回False。