Execute custom request like any other eio_* call
« eio_close		eio_dup2 »
PHP Manual Eio Functions Execute custom request like any other eio_* call

eio_custom

(PECL eio >= 0.0.1dev)

eio_custom — Execute custom request like any other eio_* call

Description

eio_custom(
    callable $execute,
    int $pri,
    callable $callback,
    mixed $data = NULL
): resource

eio_custom() executes custom function specified by execute processing it just like any other eio_* call.

Parameters

execute

Specifies the request function that should match the following prototype:

      mixed execute(mixed data);

callback is event completion callback that should match the following prototype:

      void callback(mixed data, mixed result);

data is the data passed to execute via data argument without modifications result value returned by execute

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_custom() returns request resource on success, or false on failure.

Examples

Example #1 eio_custom() example

<?php/* Callback for the custom callback */function my_custom_callback($data, $result) {    var_dump($data);    var_dump(count($result));    var_dump($result['data_modified']);    var_dump($result['result']);}/* The custom request */function my_custom($data) {    var_dump($data);    $result  = array(        'result'        => 1001,        'data_modified' => "my custom data",    );    return $result;}$data = "my_custom_data";$req = eio_custom("my_custom", EIO_PRI_DEFAULT, "my_custom_callback", $data);var_dump($req);eio_event_loop();?>

The above example will output something similar to:

resource(4) of type (EIO Request Descriptor)
string(14) "my_custom_data"
string(14) "my_custom_data"
int(2)
string(14) "my custom data"
int(1001)