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XXIII. Direct IO functions
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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.
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To get these functions to work, you have to configure PHP with --enable-dio.
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One resource type is defined by this extension: a file descriptor returnded by dio_open().
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Ŀ¼ dio_close -- Closes the file descriptor given by fd dio_fcntl -- Performs a c library fcntl on fd dio_open -- Opens a new filename with specified permissions of flags and creation permissions of mode dio_read -- Reads n bytes from fd and returns them, if n is not specified, reads 1k block dio_seek -- Seeks to pos on fd from whence dio_stat -- Gets stat information about the file descriptor fd dio_tcsetattr -- Sets terminal attributes and baud rate for a serial port dio_truncate -- Truncates file descriptor fd to offset bytes dio_write -- Writes data to fd with optional truncation at length
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dbplus_xunlockrel
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dio_close