PHP: Hypertext Preprocessor

结果回调

结果 callable 由 Memcached::getDelayed() 或 Memcached::getDelayedBykey() 方法对结果集中的每个项目进行调用。回调函数可以接收到一个 Memcached 对象合一个数组描述的元素信息，此回调函数不需要返回任何信息。

示例 #1 结果回调示例

<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$items = array(
    'key1' => 'value1',
    'key2' => 'value2',
    'key3' => 'value3'
);
$m->setMulti($items);
$m->getDelayed(array('key1', 'key3'), true, 'result_cb');

function result_cb($memc, $item)
{
    var_dump($item);
}
?>

以上示例的输出类似于：

array(3) {
  ["key"]=>
  string(4) "key1"
  ["value"]=>
  string(6) "value1"
  ["cas"]=>
  float(49)
}
array(3) {
  ["key"]=>
  string(4) "key3"
  ["value"]=>
  string(6) "value3"
  ["cas"]=>
  float(50)
}

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edwarddrapkin at gmail dot com ¶

15 years ago

I was having trouble making method calls with the result callbacks in getDelayed, so I emailed the developer.



If you want to use a non-static method as a callback, use the following format: array($obj, 'method'); for example:



<?php

class foo {

    private $M = false;

    

    public function __construct() {

        $this->M = new Memcached();

        $this->M->addServer('localhost', 11211);        

        $this->M->set('a', 'test');

    }



    public function test() {

        $this->M->getDelayed(array('a'), false, array($this, 'fun'));

    }

    

    public function fun() {

        echo "Great Success!";

    }

}



$f = new foo();

$f->test();

?>



or, alternatively:



<?php

class foo {

    public $M = false;

    

    public function __construct() {

        $this->M = new Memcached();

        $this->M->addServer('localhost', 11211);        

        $this->M->set('a', 'test');

    }

    

    public function fun() {

        echo "Great Success!";

    }

}



$f = new foo();

$f->M->getDelayed(array('a'), false, array($f, 'fun'));

?>



Works great, thanks Andrei :)