Retrieve multiple items

# Memcached::getMulti

(PECL memcached >= 0.1.0)

Memcached::getMulti — Retrieve multiple items

### Description

public Memcached::getMulti(array `$keys`, int `$get_flags` = 0): array|false

Memcached::getMulti() is similar to Memcached::get(), but instead of a single key item, it retrieves multiple items the keys of which are specified in the `keys` array.

> Note:

> Before v3.0 a second argument `&cas_tokens` was in use. It was filled with the CAS token values for the found items. The `&cas_tokens` parameter was removed in v3.0 of the extension. It was replaced with a new flag `Memcached::GET_EXTENDED` that needs is to be used as the value for `get_flags`.

The `get_flags` parameter can be used to specify additional options for Memcached::getMulti(). `Memcached::GET_PRESERVE_ORDER` ensures that the keys are returned in the same order as they were requested in. `Memcached::GET_EXTENDED` ensures that the CAS tokens will be fetched too.

### Parameters

`keys`

  Array of keys to retrieve.

`get_flags`

  The flags for the get operation.

### Return Values

Returns the array of found items or `false` on failure. Use Memcached::getResultCode() if necessary.

### Changelog

Version | Description
--- | ---
PECL memcached 3.0.0 | The `&cas_tokens` parameter was removed. The `Memcached::GET_EXTENDED` was added and when passed as a flag it ensures the CAS tokens to be fetched.

### Examples

Example #1 Memcached::getMulti() example for Memcached v3

`<?php
// Valid for v3 of the extension
$m = new Memcached();
$m->addServer('localhost', 11211);
$items = array(
'key1' => 'value1',
'key2' => 'value2',
'key3' => 'value3'
);
$m->setMulti($items);
$result = $m->getMulti(array('key1', 'key3', 'badkey'));
var_dump($result);
?>`

The above example will output something similar to:

    array(2) {
      ["key1"]=>
      string(6) "value1"
      ["key3"]=>
      string(6) "value3"
    }

Example #2 Memcached::getMulti() example for Memcached v1 and v2

`<?php
// Valid for v1 and v2 of the extension
$m = new Memcached();
$m->addServer('localhost', 11211);
$items = array(
'key1' => 'value1',
'key2' => 'value2',
'key3' => 'value3'
);
$m->setMulti($items);
$result = $m->getMulti(array('key1', 'key3', 'badkey'), $cas);
var_dump($result, $cas);
?>`

The above example will output something similar to:

    array(2) {
      ["key1"]=>
      string(6) "value1"
      ["key3"]=>
      string(6) "value3"
    }
    array(2) {
      ["key1"]=>
      float(2360)
      ["key3"]=>
      float(2362)
    }

Example #3 `Memcached::GET_PRESERVE_ORDER` example for Memcached v3

`<?php
// Valid for v3 of the extension
$m = new Memcached();
$m->addServer('localhost', 11211);
$data = array(
'foo' => 'foo-data',
'bar' => 'bar-data',
'baz' => 'baz-data',
'lol' => 'lol-data',
'kek' => 'kek-data',
);
$m->setMulti($data, 3600);
$keys = array_keys($data);
$keys[] = 'zoo';
$got = $m->getMulti($keys, Memcached::GET_PRESERVE_ORDER);
foreach ($got as $k => $v) {
echo "$k $v\n";
}
?>`

The above example will output something similar to:

    foo foo-data
    bar bar-data
    baz baz-data
    lol lol-data
    kek kek-data
    zoo

Example #4 `Memcached::GET_PRESERVE_ORDER` example for Memcached v1 and v2

`<?php
// Valid for v1 and v2 of the extension
$m = new Memcached();
$m->addServer('localhost', 11211);
$data = array(
'foo' => 'foo-data',
'bar' => 'bar-data',
'baz' => 'baz-data',
'lol' => 'lol-data',
'kek' => 'kek-data',
);
$m->setMulti($data, 3600);
$null = null;
$keys = array_keys($data);
$keys[] = 'zoo';
$got = $m->getMulti($keys, $null, Memcached::GET_PRESERVE_ORDER);
foreach ($got as $k => $v) {
echo "$k $v\n";
}
?>`

The above example will output something similar to:

    foo foo-data
    bar bar-data
    baz baz-data
    lol lol-data
    kek kek-data
    zoo

### See Also

- Memcached::getMultiByKey() - Retrieve multiple items from a specific server
- Memcached::get() - Retrieve an item
- Memcached::getDelayed() - Request multiple items

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