dio_read

(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5)

dio_read — Reads bytes from a file descriptor

설명

string dio_read ( resource $fd [, int $len= 1024 ] )

The function dio_read() reads and returns len bytes from file with descriptor fd .

인수

fd: The file descriptor returned by dio_open().
len: The number of bytes to read. If not specified, dio_read() reads 1K sized block.

반환값

The bytes read from fd .

참고

dio_write() - Writes data to fd with optional truncation at length

add a note User Contributed Notes
dio_read

alban
29-Jun-2009 09:58


I am using dio functions on windows to read RS232 port.

I can read/write but it seems that the write function cannot be binary.



In particular: 

dio_write($com1,chr(10),1); will result in writing 2 bytes 0D 0A be cause \n is translated to \r\n. I have not found any way to overcome this limitation so far

matt at vhub dot com
19-May-2006 11:48


Note that dio_read on Windows (other platforms unknown) will not timeout if there is no data to read. There is no way to specify a timeout or do a non-blocking read on Windows.

add a note

dio_seek

dio_open

Last updated: Fri, 24 Jul 2009