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128 lines
5.5 KiB
HTML
128 lines
5.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Change current storage handler</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.mysqlnd-qc-set-storage-handler" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mysqlnd_qc_set_storage_handler</h1>
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<p class="verinfo">(PECL mysqlnd_qc >= 1.0.0)</p><p class="refpurpose"><span class="refname">mysqlnd_qc_set_storage_handler</span> — <span class="dc-title">Change current storage handler</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mysqlnd-qc-set-storage-handler-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>mysqlnd_qc_set_storage_handler</strong></span>
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( <span class="methodparam">
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<span class="type">string</span>
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<code class="parameter">$handler</code>
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</span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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Sets the storage handler used by the query cache. A list of available
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storage handler can be obtained from
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<span class="function"><a href="mysqlnd_qc_get_available_handlers.html" class="function">mysqlnd_qc_get_available_handlers()</a></span>.
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Which storage are available depends on the compile time
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configuration of the query cache plugin. The
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<em>default</em> storage handler is always available.
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All other storage handler must be enabled explicitly when building the
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extension.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mysqlnd-qc-set-storage-handler-parameters">
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<h3 class="title">参数</h3>
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<dl>
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<dt>
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<code class="parameter">handler</code>
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</dt>
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<dd>
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<p class="para">
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Handler can be of type string representing the name of a
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built-in storage handler or an object of type
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<em>mysqlnd_qc_handler_default</em>.
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The names of the built-in storage handler are
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<em>default</em>,
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<em>APC</em>,
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<em>MEMCACHE</em>,
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<em>sqlite</em>.
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</p>
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</dd>
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</dl>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.mysqlnd-qc-set-storage-handler-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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<p class="para">
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If changing the storage handler fails a catchable fatal error will
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be thrown. The query cache cannot operate if the previous storage
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handler has been shutdown but no new storage handler has been installed.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.mysqlnd-qc-set-storage-handler-examples">
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<h3 class="title">范例</h3>
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<div class="example" id="example-2301">
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<p><strong>Example #1 <span class="function"><strong>mysqlnd_qc_set_storage_handler()</strong></span> example</strong></p>
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<div class="example-contents"><p>
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The example shows the output from the built-in default storage handler.
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Other storage handler may report different data.
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</p></div>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">mysqlnd_qc_set_storage_handler</span><span style="color: #007700">(</span><span style="color: #DD0000">"memcache"</span><span style="color: #007700">));<br /><br />if (</span><span style="color: #0000BB">true </span><span style="color: #007700">=== </span><span style="color: #0000BB">mysqlnd_qc_set_storage_handler</span><span style="color: #007700">(</span><span style="color: #DD0000">"default"</span><span style="color: #007700">))<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Default storage handler activated"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Catchable fatal error */<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">mysqlnd_qc_set_storage_handler</span><span style="color: #007700">(</span><span style="color: #DD0000">"unknown"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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bool(true)
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Default storage handler activated
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Catchable fatal error: mysqlnd_qc_set_storage_handler(): Unknown handler 'unknown' in (file) on line (line)
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</pre></div>
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</div>
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</div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mysqlnd-qc-set-storage-handler-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member">
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<a href="mysqlnd_qc.installation.html" class="link">Installation</a>
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</li>
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<li class="member">
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<span class="function"><a href="mysqlnd_qc_get_available_handlers.html" class="function" rel="rdfs-seeAlso">mysqlnd_qc_get_available_handlers()</a> - Returns a list of available storage handler</span>
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</li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |