PHP Conference Nagoya 2025

    Result callbacks

    Result callables are invoked by Memcached::getDelayed() or Memcached::getDelayedBykey() methods for each item in the result set. The callback is passed the Memcached object and the array with the item information. The callback does not have to return anything.

    Example #1 Result callback example

    <?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);
    }
    ?>

    The above example will output something similar to:

    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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    User Contributed Notes 1 note

    up
    3
    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 :)
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