eio_custom

(PECL eio >= 0.0.1dev)

eio_customExecute custom request like any other eio_* call.

说明

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

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_DEFAULTEIO_PRI_MINEIO_PRI_MAXNULL。如果是 NULLpri 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)
 
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