&reftitle.intro; PHP supports the direct io functions as described in the Posix Standard (Section 6) for performing I/O functions at a lower level than the C-Language stream I/O functions (fopen, fread,..). The use of the DIO functions should be considered only when direct control of a device is needed. In all other cases, the standard filesystem functions are more than adequate. &pecl.moved-ver;5.1.0. This extension is only available on Windows Platforms as of PHP 5.0.0 &reference.dio.setup; &reference.dio.constants; &reference.dio.reference;