Php/docs/function.eio-custom

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• Eio 函数
• 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

说明

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.

参数

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

请求的优先级：EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX 或 null。如果是 null，pri 将设为 EIO_PRI_DEFAULT。

callback

callback 函数在请求完成时被调用。其应匹配一下原型：

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

data

传递给请求的用户数据。

result

针对请求的结果的值。通常是相应的系统调用返回的值。

req

可选的请求资源，可被 eio_get_last_error() 之类的函数使用。

data

Arbitrary variable passed to callback.

返回值

eio_custom() returns request resource on success or false on error.

范例

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();?>

以上例程的输出类似于：

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)