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php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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><H1
><A
NAME="function.Memcache-setServerParams"
></A
>Memcache::setServerParams</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN118848"
></A
><P
>    (no version information, might be only in CVS)</P
>Memcache::setServerParams&nbsp;--&nbsp;Changes server parameters and status at runtime</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN118851"
></A
><H2
>说明</H2
>bool <B
CLASS="methodname"
>Memcache::setServerParams</B
> ( string host [, int port [, int timeout [, int retry_interval [, bool status [, callback failure_callback]]]]] )<BR
></BR
><P
>&#13;   <B
CLASS="function"
>Memcache::setServerParams()</B
> changes server parameters at runtime.
   You can also use the <B
CLASS="function"
>memcache_set_server_params()</B
> function.
  </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
    This function has been added to Memcache version 2.1.0.
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN118879"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>host</CODE
></DT
><DD
><P
>&#13;       Point to the host where memcached is listening for connections.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>port</CODE
></DT
><DD
><P
>&#13;       Point to the port where memcached is listening for connections.
       This parameter is optional and its default value is 11211.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>timeout</CODE
></DT
><DD
><P
>&#13;       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
><CODE
CLASS="parameter"
>retry_interval</CODE
></DT
><DD
><P
>&#13;       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 <CODE
CLASS="parameter"
>persistent</CODE
> parameter has any 
       effect when the extension is loaded dynamically via <A
HREF="function.dl.html"
><B
CLASS="function"
>dl()</B
></A
>.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>status</CODE
></DT
><DD
><P
>&#13;       Controls if the server should be flagged as online. Setting this parameter
       to <TT
CLASS="constant"
><B
>FALSE</B
></TT
> and <CODE
CLASS="parameter"
>retry_interval</CODE
> 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 <CODE
CLASS="parameter"
>memcache.allow_failover</CODE
> setting.
       Default to <TT
CLASS="constant"
><B
>TRUE</B
></TT
>, meaning the server should be considered online.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>failure_callback</CODE
></DT
><DD
><P
>&#13;       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
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN118919"
></A
><H2
>返回值</H2
><P
>&#13;   如果成功则返回 <TT
CLASS="constant"
><B
>TRUE</B
></TT
>，失败则返回 <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN118924"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN118927"
></A
><P
><B
>例 1. <B
CLASS="function"
>Memcache::setServerParams()</B
> example</B
></P
><TABLE
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br /></font><font color="#007700">function </font><font color="#0000BB">_callback_memcache_failure</font><font color="#007700">(</font><font color="#0000BB">$host</font><font color="#007700">, </font><font color="#0000BB">$port</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;print </font><font color="#DD0000">"memcache '$host:$port' failed"</font><font color="#007700">;<br />}<br /><br /></font><font color="#FF8000">/* OO API */<br /><br /></font><font color="#0000BB">$memcache </font><font color="#007700">= new </font><font color="#0000BB">Memcache</font><font color="#007700">;<br /><br /></font><font color="#FF8000">// Add the server in offline mode<br /></font><font color="#0000BB">$memcache</font><font color="#007700">-&gt;</font><font color="#0000BB">addServer</font><font color="#007700">(</font><font color="#DD0000">'memcache_host'</font><font color="#007700">, </font><font color="#0000BB">11211</font><font color="#007700">, </font><font color="#0000BB">false</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">false</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// Bring the server back online<br /></font><font color="#0000BB">$memcache</font><font color="#007700">-&gt;</font><font color="#0000BB">setServerParams</font><font color="#007700">(</font><font color="#DD0000">'memcache_host'</font><font color="#007700">, </font><font color="#0000BB">11211</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">15</font><font color="#007700">, </font><font color="#0000BB">true</font><font color="#007700">, </font><font color="#DD0000">'_callback_memcache_failure'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* procedural API */<br /><br /></font><font color="#0000BB">$memcache_obj </font><font color="#007700">= </font><font color="#0000BB">memcache_connect</font><font color="#007700">(</font><font color="#DD0000">'memcache_host'</font><font color="#007700">, </font><font color="#0000BB">11211</font><font color="#007700">);<br /></font><font color="#0000BB">memcache_set_server_params</font><font color="#007700">(</font><font color="#0000BB">$memcache_obj</font><font color="#007700">, </font><font color="#DD0000">'memcache_host'</font><font color="#007700">, </font><font color="#0000BB">11211</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">15</font><font color="#007700">, </font><font color="#0000BB">true</font><font color="#007700">, </font><font color="#DD0000">'_callback_memcache_failure'</font><font color="#007700">);<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN118931"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><TBODY
><TR
><TD
><B
CLASS="function"
>Memcache::addServer()</B
></TD
></TR
><TR
><TD
><B
CLASS="function"
>Memcache::getServerStatus()</B
></TD
></TR
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><P
></P
>
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