eio_custom

(PECL eio >= 0.0.1dev)

eio_custom — Execute custom request like any other eio_* call

說(shuō)明

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.

參數(shù)

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

請(qǐng)求的優(yōu)先級(jí)：EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX 或 null。如果是 null，pri 將設(shè)為 EIO_PRI_DEFAULT。

callback

callback 函數(shù)在請(qǐng)求完成時(shí)被調(diào)用。其應(yīng)匹配一下原型：


void callback(mixed $data, int $result[, resource $req]);

data: 傳遞給請(qǐng)求的用戶數(shù)據(jù)。
result: 針對(duì)請(qǐng)求的結(jié)果的值。通常是相應(yīng)的系統(tǒng)調(diào)用返回的值。
req: 可選的請(qǐng)求資源，可被 eio_get_last_error() 之類的函數(shù)使用。

data

Arbitrary variable passed to callback.

返回值

eio_custom() returns request resource on success, 或者在失敗時(shí)返回 false.

范例

示例 #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();
?>

以上例程的輸出類似于：

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)