<!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>Changes server parameters and status at runtime</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="memcache.setcompressthreshold.html">Memcache::setCompressThreshold</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.memcache.html">Memcache Functions</a></div> <div class="up"><a href="class.memcache.html">Memcache</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="memcache.setserverparams" class="refentry"> <div class="refnamediv"> <h1 class="refname">Memcache::setServerParams</h1> <p class="verinfo">(PECL memcache >= 2.1.0)</p><p class="refpurpose"><span class="refname">Memcache::setServerParams</span> — <span class="dc-title">Changes server parameters and status at runtime</span></p> </div> <div class="refsect1 description" id="refsect1-memcache.setserverparams-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><strong>Memcache::setServerParams</strong></span> ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$host</code></span> [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$port</code><span class="initializer"> = 11211</span></span> [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$timeout</code></span> [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$retry_interval</code><span class="initializer"> = false</span></span> [, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$status</code></span> [, <span class="methodparam"><span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$failure_callback</code></span> ]]]]] )</div> <p class="para rdfs-comment"> <span class="function"><strong>Memcache::setServerParams()</strong></span> changes server parameters at runtime. You can also use the <span class="function"><strong>memcache_set_server_params()</strong></span> function. </p> <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para"> This function has been added to Memcache version 2.1.0. </p> </p></blockquote> </div> <div class="refsect1 parameters" id="refsect1-memcache.setserverparams-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">host</code></em></span> <dd> <p class="para"> Point to the host where memcached is listening for connections. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">port</code></em></span> <dd> <p class="para"> Point to the port where memcached is listening for connections. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">timeout</code></em></span> <dd> <p class="para"> Value in seconds which will be used for connecting to the daemon. Think twice before changing the default value of 1 second - you can lose all the advantages of caching if your connection is too slow. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">retry_interval</code></em></span> <dd> <p class="para"> Controls how often a failed server will be retried, the default value is 15 seconds. Setting this parameter to -1 disables automatic retry. Neither this nor the <em><code class="parameter">persistent</code></em> parameter has any effect when the extension is loaded dynamically via <span class="function"><a href="function.dl.html" class="function">dl()</a></span>. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">status</code></em></span> <dd> <p class="para"> Controls if the server should be flagged as online. Setting this parameter to <strong><code>FALSE</code></strong> and <em><code class="parameter">retry_interval</code></em> to -1 allows a failed server to be kept in the pool so as not to affect the key distribution algoritm. Requests for this server will then failover or fail immediately depending on the <em><code class="parameter">memcache.allow_failover</code></em> setting. Default to <strong><code>TRUE</code></strong>, meaning the server should be considered online. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">failure_callback</code></em></span> <dd> <p class="para"> Allows the user to specify a callback function to run upon encountering an error. The callback is run before failover is attempted. The function takes two parameters, the hostname and port of the failed server. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-memcache.setserverparams-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure. </p> </div> <div class="refsect1 examples" id="refsect1-memcache.setserverparams-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-4425"> <p><strong>Example #1 <span class="function"><strong>Memcache::setServerParams()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /><br /></span><span style="color: #007700">function </span><span style="color: #0000BB">_callback_memcache_failure</span><span style="color: #007700">(</span><span style="color: #0000BB">$host</span><span style="color: #007700">, </span><span style="color: #0000BB">$port</span><span style="color: #007700">) {<br /> print </span><span style="color: #DD0000">"memcache '</span><span style="color: #0000BB">$host</span><span style="color: #DD0000">:</span><span style="color: #0000BB">$port</span><span style="color: #DD0000">' failed"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">/* OO API */<br /><br /></span><span style="color: #0000BB">$memcache </span><span style="color: #007700">= new </span><span style="color: #0000BB">Memcache</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Add the server in offline mode<br /></span><span style="color: #0000BB">$memcache</span><span style="color: #007700">-></span><span style="color: #0000BB">addServer</span><span style="color: #007700">(</span><span style="color: #DD0000">'memcache_host'</span><span style="color: #007700">, </span><span style="color: #0000BB">11211</span><span style="color: #007700">, </span><span style="color: #0000BB">false</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, -</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">false</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Bring the server back online<br /></span><span style="color: #0000BB">$memcache</span><span style="color: #007700">-></span><span style="color: #0000BB">setServerParams</span><span style="color: #007700">(</span><span style="color: #DD0000">'memcache_host'</span><span style="color: #007700">, </span><span style="color: #0000BB">11211</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">15</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">, </span><span style="color: #DD0000">'_callback_memcache_failure'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* procedural API */<br /><br /></span><span style="color: #0000BB">$memcache_obj </span><span style="color: #007700">= </span><span style="color: #0000BB">memcache_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'memcache_host'</span><span style="color: #007700">, </span><span style="color: #0000BB">11211</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">memcache_set_server_params</span><span style="color: #007700">(</span><span style="color: #0000BB">$memcache_obj</span><span style="color: #007700">, </span><span style="color: #DD0000">'memcache_host'</span><span style="color: #007700">, </span><span style="color: #0000BB">11211</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">15</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">, </span><span style="color: #DD0000">'_callback_memcache_failure'</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-memcache.setserverparams-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="memcache.addserver.html" class="function" rel="rdfs-seeAlso">Memcache::addServer()</a> - Add a memcached server to connection pool</span></li> <li class="member"> <span class="function"><a href="memcache.getserverstatus.html" class="function" rel="rdfs-seeAlso">Memcache::getServerStatus()</a> - Returns server status</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="memcache.setcompressthreshold.html">Memcache::setCompressThreshold</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.memcache.html">Memcache Functions</a></div> <div class="up"><a href="class.memcache.html">Memcache</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>