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,..).
These functions are available as part of the
standard module, which is always available.
To get these functions to work, you have to configure PHP with
--enable-dio.
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asetusta.
One resource type is defined by this extension:
a file descriptor returnded by dio_open().
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