PHP5 Manual

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dio_open

(PHP 4 >= 4.2.0, PHP 5 <= 5.0.4)

dio_open -- Opens a new filename with specified permissions of flags and creation permissions of mode

Description

resource dio_open ( string filename, int flags [, int mode] )

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

Parameters

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).

O_RDONLY - opens the file for read access.
O_WRONLY - opens the file for write access.
O_RDWR - opens the file for both reading and writing.

Return Values

A file descriptor or FALSE on error.

Examples

Example 1. Opening a file descriptor


<?php

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

dio_close($fd);
?>

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