EIO_OPEN(3) 1 EIO_OPEN(3)
eio_open - Opens a file
SYNOPSIS
resource eio_open (string $path, int $flags, int $mode, int $pri, callable $callback, [mixed $data = NULL])
DESCRIPTION
eio_open(3) opens file specified by $path in access mode $mode with
PARAMETERS
o $path
- Path of the file to be opened.
Warning
In some SAPIs(e.g. PHP-FPM) it could fail, if you don't specify full path.
o $flags
-One of EIO_O_* constants, or their combinations. EIO_O_* constants have the same meaning, as their corresponding O_* counter-
parts defined in fnctl.h C header file. Default is EIO_O_RDWR.
o $mode
-One of EIO_S_I* constants, or their combination (via bitwise OR operator). The constants have the same meaning as their S_I*
counterparts defined in sys/stat.h C header file. Required, if a file is created. Otherwise ignored.
o $pri
-The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, $pri internally is set to
EIO_PRI_DEFAULT.
o $callback
-$callback function is called when the request is done. It should match the following prototype:
void callback(mixed $data, int $result[, resource $req]);
o $data
-is custom data passed to the request.
o $result
-request-specific result value; basically, the value returned by corresponding system call.
o $req
-is optional request resource which can be used with functions like eio_get_last_error(3)
o $data
- Arbitrary variable passed to $callback.
RETURN VALUES
eio_open(3) returns file descriptor in $result argument of $callback on success; otherwise, $result is equal to -1.
EXAMPLES
Example #1
eio_open(3) example
<?php
$temp_filename = "eio-temp-file.tmp";
/* Is called when eio_close() finishes */
function my_close_cb($data, $result) {
// Zero indicates success
var_dump($result == 0);
@unlink($data);
}
/* Is called when eio_open() finishes */
function my_file_opened_callback($data, $result) {
// $result should contain the file descriptor
var_dump($result > 0);
if ($result > 0) {
// Close the file
eio_close($result, EIO_PRI_DEFAULT, "my_close_cb", $data);
eio_event_loop();
}
}
// Create new file for reading and writing
// Deny group and others to do anything with that file
eio_open($temp_filename, EIO_O_CREAT | EIO_O_RDWR, EIO_S_IRUSR | EIO_S_IWUSR,
EIO_PRI_DEFAULT, "my_file_opened_callback", $temp_filename);
eio_event_loop();
?>
The above example will output something similar to:
bool(true)
bool(true)
SEE ALSO eio_mknod.
PHP Documentation Group EIO_OPEN(3)