eio_grp
eio_grp
(PECL eio >= 0.0.1dev)
eio_grp — Creates a request group.
Description
resource eio_grp ( callable $callback [, string $data = NULL ] )
eio_grp() creates a request group.
Parameters
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_grp() returns request group resource on success or FALSE on error.
Examples
Example #1 eio_grp() example
<?php
$temp_filename = dirname(__FILE__) ."/eio-file.tmp";
$fp = fopen($temp_filename, "w"
fwrite($fp, "some data"
fclose($fp
$my_file_fd = NULL;
/* Is called when the group requests are done */
function my_grp_done($data, $result) {
// Remove the file, if it still exists
@unlink($data
}
/* Is called when the temporary file is opened */
function my_grp_file_opened_callback($data, $result) {
global $my_file_fd, $grp;
$my_file_fd = $result;
$req = eio_read($my_file_fd, 4, 0,
EIO_PRI_DEFAULT, "my_grp_file_read_callback"
eio_grp_add($grp, $req
}
/* Is called when the file is read */
function my_grp_file_read_callback($data, $result) {
global $my_file_fd, $grp;
var_dump($result
// Create request to close the file
$req = eio_close($my_file_fd
// Add request to the group
eio_grp_add($grp, $req
}
// Create request group
$grp = eio_grp("my_grp_done", $temp_filename
// Create request
$req = eio_open($temp_filename, EIO_O_RDWR | EIO_O_APPEND , NULL,
EIO_PRI_DEFAULT, "my_grp_file_opened_callback", NULL
// Add request to the group
eio_grp_add($grp, $req
// Process requests
eio_event_loop(
?>
The above example will output something similar to:
string(4) "some"
See Also
- eio_grp_cancel
- eio_grp_add
← eio_grp_limit
eio_init →
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Licensed under the Creative Commons Attribution License v3.0 or later.
