请教下面的有关问题如何解决
请问下面的问题怎么解决？
一个php程序部署在两台或两台以上的服务器上，这个php要在一个共享目录下建立一个文件夹，名字是一个ID。这个文件夹这个ID是调用这个php的web系统传过来的。但是有可能不同的用户访问不同的服务器，但是发送的ID相同。（别的参数不同）。请问我怎样采用同步的策略，保证两台服务器不会同时建立相同的文件夹。谢谢！
------解决方案--------------------
php 能访问共享目录吗？应该不可以的
------解决方案--------------------
php 无此功能
但你可以尝试用 file_get_contents 和 file_put_contents 读写已存在的目录（不保证成功）
------解决方案--------------------
请教斯诺登
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