eio_open
eio_open
(PECL eio >= 0.0.1dev)
eio_open — Opens a file
Description
resource eio_open ( string $path , int $flags , int $mode , int $pri , callable $callback [, mixed $data = NULL ] )
eio_open() opens file specified by path in access mode mode with
Parameters
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.
flags
One of EIO_O_* constants, or their combinations. EIO_O_* constants have the same meaning, as their corresponding O_* counterparts defined in fnctl.h C header file. Default is EIO_O_RDWR.
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.
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.
callback
callback function is called when the request is done. It should match the following prototype:
void callback(mixed $data, int $result[, resource $req]
data
is custom data passed to the request.
result
request-specific result value; basically, the value returned by corresponding system call.
req
is optional request resource which can be used with functions like eio_get_last_error()
`data`
Arbitrary variable passed to callback.
Return Values
eio_open() returns file descriptor in result argument of callback on success; otherwise, result is equal to -1.
Examples
Example #1 eio_open() 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
← eio_nthreads
eio_poll →
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Licensed under the Creative Commons Attribution License v3.0 or later.
