结果回调

Result callbacks方式在通过Memcached::getDelayed()或 Memcached::getDelayedBykey()方法获取元素后，为结果集中每个元素调用一次。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。

Example #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);
}
?>

以上例程的输出类似于：

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)
}

User Contributed Notes

edwarddrapkin at gmail dot com 11-Mar-2009 05:54


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 :)