Php/docs/migration73.windows-support
来自菜鸟教程
Windows 支持
PHP 核心
更符合 POSIX 标准的文件删除方法
File descriptors are opened in shared read/write/delete mode by default. This effectively maps the POSIX semantics and allows to delete files with handles in use. It is not 100% same, some platform differences still persist. After the deletion, the filename entry is blocked, until all the opened handles to it are closed.