PHP Australia Conference 2015

Result callbacks

Result callbacks 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);
}
?>

Il precedente esempio visualizzerĂ  qualcosa simile a:

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

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1
edwarddrapkin at gmail dot com
5 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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