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.
dio_read
(PHP 4 >= 4.2.0, PHP 5 < 5.1.0)
dio_read — Leer bytes de un descriptor de fichero
Descripción
La función dio_read() lee y devuelve
len bytes de fichero con descriptor
fd.
Parámetros
-
fd -
El fichero descriptor devuelto pordio_open().
-
len -
El número de bytes a leer. Si no se especifica la lectura es de bloques de 1K dio_read()
Valores devueltos
La bytes leídos desde fd.
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User Contributed Notes 2 notes
matt at vhub dot com ¶
18 years ago
alban ¶
15 years ago
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
