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<title>Retrieve an item</title>
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<h1 class="refname">Memcached::get</h1>
<p class="verinfo">(PECL memcached >= 0.1.0)</p><p class="refpurpose"><span class="refname">Memcached::get</span> — <span class="dc-title">Retrieve an item</span></p>
</div>
<div class="refsect1 description" id="refsect1-memcached.get-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::get</strong></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::get()</strong></span> returns the item that was previously
stored under the <em><code class="parameter">key</code></em>. If the item is found and
<em><code class="parameter">cas_token</code></em> variable is provided, it will contain the
CAS token value for the item. See
<span class="methodname"><a href="memcached.cas.html" class="methodname">Memcached::cas()</a></span> for how to use CAS tokens. <a href="memcached.callbacks.html" class="link">Read-through caching callback</a> may be
specified via <em><code class="parameter">cache_cb</code></em> parameter.
</p>
<p class="para">
</p>
</div>
<div class="refsect1 parameters" id="refsect1-memcached.get-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">key</code></em></span>
<dd>
<p class="para">
The key of the item to retrieve.
</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.get-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 examples" id="refsect1-memcached.get-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4438">
<p><strong>Example #1 <span class="function"><strong>Memcached::get()</strong></span> example #1</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$m </span><span style="color: #007700">= new </span><span style="color: #0000BB">Memcached</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">addServer</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #0000BB">11211</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">set</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">get</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
int(100)
</pre></div>
</div>
</div>
<div class="example" id="example-4439">
<p><strong>Example #2 <span class="function"><strong>Memcached::get()</strong></span> example #2</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$m </span><span style="color: #007700">= new </span><span style="color: #0000BB">Memcached</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">addServer</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #0000BB">11211</span><span style="color: #007700">);<br /><br />if (!(</span><span style="color: #0000BB">$ip </span><span style="color: #007700">= </span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">get</span><span style="color: #007700">(</span><span style="color: #DD0000">'ip_block'</span><span style="color: #007700">))) {<br /> if (</span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">getResultCode</span><span style="color: #007700">() == </span><span style="color: #0000BB">Memcached</span><span style="color: #007700">::</span><span style="color: #0000BB">RES_NOTFOUND</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$ip </span><span style="color: #007700">= array();<br /> </span><span style="color: #0000BB">$m</span><span style="color: #007700">-></span><span style="color: #0000BB">set</span><span style="color: #007700">(</span><span style="color: #DD0000">'ip_block'</span><span style="color: #007700">, </span><span style="color: #0000BB">$ip</span><span style="color: #007700">);<br /> } else {<br /> </span><span style="color: #FF8000">/* log error */<br /> /* ... */<br /> </span><span style="color: #007700">}<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-memcached.get-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="methodname"><a href="memcached.getbykey.html" class="methodname" rel="rdfs-seeAlso">Memcached::getByKey()</a> - Retrieve an item from a specific server</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>
</div>
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