dio_open

Opens a new filename with specified permissions of flags and creation permissions of mode (PHP 4 >= 4.2.0, PHP 5 <= 5.0.5)
resource dio_open ( string filename, int flags [, int mode] )

dio_open() opens a file and returns a new file descriptor for it.

filename

The opened file.

flags

The flags parameter can also include any combination of the following flags:

O_CREAT - creates the file, if it doesn't already exist.
O_EXCL - if both, O_CREAT and O_EXCL are set, dio_open() fails, if the file already exists.
O_TRUNC - if the file exists, and its opened for write access, the file will be truncated to zero length.
O_APPEND - write operations write data at the end of the file.
O_NONBLOCK - sets non blocking mode.

mode

If flags is O_CREAT, mode will set the mode of the file (creation permissions).

A file descriptor or FALSE on error.

<?php


$fd = dio_open('/dev/ttyS0', O_RDWR | O_NOCTTY | O_NONBLOCK);

dio_close($fd);
?>