Memcached::getDelayed

(PECL memcached >= 0.1.0)

Memcached::getDelayed — Request multiple items

說明

public bool Memcached::getDelayed ( array $keys [, bool $with_cas [, callable $value_cb ]] )

Memcached::getDelayed() issues a request to memcache for multiple items the keys of which are specified in the keys array. The method does not wait for response and returns right away. When you are ready to collect the items, call either Memcached::fetch() or Memcached::fetchAll(). If with_cas is true, the CAS token values will also be requested.

Instead of fetching the results explicitly, you can specify a result callback via value_cb parameter.

參數

keys: Array of keys to request.
with_cas: Whether to request CAS token values also.
value_cb: The result callback or NULL.

回傳值

如果成功則回傳 TRUE，失敗則回傳 FALSE。如需要則使用 Memcached::getResultCode()。

範例

Example #1 Memcached::getDelayed() example


<?php
$m = new Memcached();
$m->addServer('localhost', 11211);

$m->set('int', 99);
$m->set('string', 'a simple string');
$m->set('array', array(11, 12));

$m->getDelayed(array('int', 'array'), true);
var_dump($m->fetchAll());
?>

上例將輸出：

array(2) {
  [0]=>
  array(3) {
    ["key"]=>
    string(3) "int"
    ["value"]=>
    int(99)
    ["cas"]=>
    float(2363)
  }
  [1]=>
  array(3) {
    ["key"]=>
    string(5) "array"
    ["value"]=>
    array(2) {
      [0]=>
      int(11)
      [1]=>
      int(12)
    }
    ["cas"]=>
    float(2365)
  }
}

參見

Memcached::getDelayedByKey() - Request multiple items from a specific server
Memcached::fetch() - Fetch the next result
Memcached::fetchAll() - Fetch all the remaining results

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User Contributed Notes 1 note

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antmat at mail dot ru ¶

13 years ago


Actually, when you pass a callback, method doesn't return immediately, but waits for results and calls callback function.

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