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<h1 class="refname">Memcached::getByKey</h1>
<p class="verinfo">(PECL memcached >= 0.1.0)</p><p class="refpurpose"><span class="refname">Memcached::getByKey</span> — <span class="dc-title">Retrieve an item from a specific server</span></p>
</div>
<div class="refsect1 description" id="refsect1-memcached.getbykey-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>Memcached::getByKey</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$server_key</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$key</code></span>
[, <span class="methodparam"><span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$cache_cb</code></span>
[, <span class="methodparam"><span class="type">float</span> <code class="parameter reference">&$cas_token</code></span>
]] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>Memcached::getByKey()</strong></span> is functionally equivalent to
<span class="methodname"><a href="memcached.get.html" class="methodname">Memcached::get()</a></span>, except that the free-form
<em><code class="parameter">server_key</code></em> can be used to map the
<em><code class="parameter">key</code></em> to a specific server.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-memcached.getbykey-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">server_key</code></em></span>
<dd>
<p class="para">
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.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">key</code></em></span>
<dd>
<p class="para">
The key of the item to fetch.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">cache_cb</code></em></span>
<dd>
<p class="para">
Read-through caching callback or <strong><code>NULL</code></strong>
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">cas_token</code></em></span>
<dd>
<p class="para">
The variable to store the CAS token in.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-memcached.getbykey-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the value stored in the cache or <strong><code>FALSE</code></strong> otherwise.
The <span class="methodname"><a href="memcached.getresultcode.html" class="methodname">Memcached::getResultCode()</a></span> will return
<strong><code>Memcached::RES_NOTFOUND</code></strong> if the key does not exist.
</p>
</div>
<div class="refsect1 seealso" id="refsect1-memcached.getbykey-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="methodname"><a href="memcached.get.html" class="methodname" rel="rdfs-seeAlso">Memcached::get()</a> - Retrieve an item</span></li>
<li class="member"> <span class="methodname"><a href="memcached.getmulti.html" class="methodname" rel="rdfs-seeAlso">Memcached::getMulti()</a> - Retrieve multiple items</span></li>
<li class="member"> <span class="methodname"><a href="memcached.getdelayed.html" class="methodname" rel="rdfs-seeAlso">Memcached::getDelayed()</a> - Request multiple items</span></li>
</ul>
</p>
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