<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Retrieve an item</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="memcached.flush.html">Memcached::flush</a></div> <div class="next" style="text-align: right; float: right;"><a href="memcached.getallkeys.html">Memcached::getAllKeys</a></div> <div class="up"><a href="class.memcached.html">Memcached</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="memcached.get" class="refentry"> <div class="refnamediv"> <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> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; 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