Map a key to a server

# Memcached::getServerByKey

(PECL memcached >= 0.1.0)

Memcached::getServerByKey — Map a key to a server

### Description

public Memcached::getServerByKey(string `$server_key`): array|false

Memcached::getServerByKey() returns the server that would be selected by a particular `server_key` in all the Memcached::*ByKey() operations.

### Parameters

`server_key`

  The key identifying the server to store the value on or retrieve it from. Instead of hashing on the actual key for the item, we hash on the server key when deciding which memcached server to talk to. This allows related items to be grouped together on a single server for efficiency with multi operations.

### Return Values

Returns an array containing three keys of `host`, `port`, and `weight` on success or `false` on failure. Use Memcached::getResultCode() if necessary.

### Examples

Example #1 Memcached::getServerByKey() example

`<?php
$m = new Memcached();
$m->addServers(array(
array('mem1.domain.com', 11211, 40),
array('mem2.domain.com', 11211, 40),
array('mem3.domain.com', 11211, 20),
));
$m->setOption(Memcached::OPT_LIBKETAMA_COMPATIBLE, true);
var_dump($m->getServerByKey('user'));
var_dump($m->getServerByKey('log'));
var_dump($m->getServerByKey('ip'));
?>`

The above example will output something similar to:

    array(3) {
      ["host"]=>
      string(15) "mem3.domain.com"
      ["port"]=>
      int(11211)
      ["weight"]=>
      int(20)
    }
    array(3) {
      ["host"]=>
      string(15) "mem2.domain.com"
      ["port"]=>
      int(11211)
      ["weight"]=>
      int(40)
    }
    array(3) {
      ["host"]=>
      string(15) "mem2.domain.com"
      ["port"]=>
      int(11211)
      ["weight"]=>
      int(40)
    }

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