📄 function.memcache-setserverparams.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Changes server parameters and status at runtime</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.memcache.html">Memcache Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.mqseries.html">mqseries</a></div> <div class="up"><a href="ref.memcache.html">Memcache Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.memcache-setserverparams" class="refentry"> <div class="refnamediv"> <h1 class="refname">Memcache::setServerParams</h1> <p class="verinfo">(No version information available, might be only in CVS)</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"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>Memcache::setServerParams</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$host</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$port</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$timeout</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$retry_interval</tt></span> [, <span class="methodparam"><span class="type">bool</span> <tt class="parameter">$status</tt></span> [, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.callback" class="type callback">callback</a></span> <tt class="parameter">$failure_callback</tt></span> ]]]]] )</div> <p class="para rdfs-comment"> <b>Memcache::setServerParams()</b> changes server parameters at runtime. You can also use the <b>memcache_set_server_params()</b> function. </p> <blockquote><p><b class="note">Note</b>: This function has been added to Memcache version 2.1.0. <br /> </p></blockquote> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">host</tt></i></span> <dd> <p class="para"> Point to the host where memcached is listening for connections. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">port</tt></i></span> <dd> <p class="para"> Point to the port where memcached is listening for connections. This parameter is optional and its default value is 11211. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">timeout</tt></i></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"><i><tt class="parameter">retry_interval</tt></i></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 <i><tt class="parameter">persistent</tt></i> parameter has any effect when the extension is loaded dynamically via <a href="function.dl.html" class="function">dl()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">status</tt></i></span> <dd> <p class="para"> Controls if the server should be flagged as online. Setting this parameter to <b><tt>FALSE</tt></b> and <i><tt class="parameter">retry_interval</tt></i> 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 immediatly depending on the <i><tt class="parameter">memcache.allow_failover</tt></i> setting. Default to <b><tt>TRUE</tt></b>, meaning the server should be considered online. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">failure_callback</tt></i></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 attemped. The function takes two parameters, the hostname and port of the failed server. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>Memcache::setServerParams()</b> example</b></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 '$host:$port' 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"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.memcache-addserver.html" class="function" rel="rdfs-seeAlso">Memcache::addServer()</a></li> <li class="member"><a href="function.memcache-getserverstatus.html" class="function" rel="rdfs-seeAlso">Memcache::getServerStatus()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.memcache.html">Memcache Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.mqseries.html">mqseries</a></div> <div class="up"><a href="ref.memcache.html">Memcache Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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