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PHP - Direct I/O Functions
PHP can support direct I/O functions as described in Posix Standard for performing I/O functions at a lower level than C-Language stream I/O functions (fopen(), read(), ..). The use of DIO functions could be considered only when direct control of a device has needed. In all other cases, standard filesystem functions are more than adequate.
This extension can be available only on Windows Platforms as of PHP 5.0.0.
Predefined Constants
The constants are defined below by this extension and can be available only when an extension has either compiled into PHP or dynamically loaded at runtime.
- F_DUPFD (integer)
- F_GETFD (integer)
- F_GETFL (integer)
- F_GETLK (integer)
- F_GETOWN (integer)
- F_RDLCK (integer)
- F_SETFL (integer)
- F_SETLK (integer)
- F_SETLKW (integer)
- F_SETOWN (integer)
- F_UNLCK (integer) (integer)
- F_WRLCK (integer)
- O_APPEND (integer)
- O_ASYNC (integer)
- O_CREAT (integer)
- O_EXCL (integer)
- O_NDELAY (integer)
- O_NOCTTY (integer)
- O_NONBLOCK (integer)
- O_RDONLY (integer)
- O_RDWR (integer)
- O_SYNC (integer)
- O_TRUNC (integer)
- O_WRONLY (integer)
- S_IRGRP (integer)
- S_IROTH (integer)
- S_IRUSR (integer)
- S_IRWXG (integer)
- S_IRWXO (integer)
- S_IRWXU (integer)
- S_IWGRP (integer)
- S_IWOTH (integer)
- S_IWUSR (integer)
- S_IXGRP (integer)
- S_IXOTH (integer)
- S_IXUSR (integer)
| Sr.No | Function & Description |
|---|---|
| 1 |
Function can close a file descriptor given by fd. |
| 2 |
Function can perform a function fcntl of the c-library on fd descriptor. |
| 3 |
Function can open a new filename file with specified flags permission and mode creation permission. |
| 4 |
Function can read bytes from a file descriptor. |
| 5 |
Function can look for pos in fd from whence. |
| 6 |
Function can return statistics about a file descriptor fd. |
| 7 |
Function can set terminal attributes and baud rate for a serial port. |
| 8 |
Function can truncate a file with the fd descriptor by offset bytes. |
| 9 |
Function can write data to fd with optional truncation of length. |