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277 lines
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277 lines
11 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>Returns information about the plugin configuration</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-memcache-get-config" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mysqlnd_memcache_get_config</h1>
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<p class="verinfo">(PECL mysqlnd_memcache >= 1.0.0)</p><p class="refpurpose"><span class="refname">mysqlnd_memcache_get_config</span> — <span class="dc-title">Returns information about the plugin configuration</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mysqlnd-memcache-get-config-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_memcache_get_config</strong></span>
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( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$connection</code></span>
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) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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This function returns an array of all mysqlnd_memcache related configuration
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information that is attached to the MySQL connection. This includes MySQL, the
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Memcache object provided via <span class="function"><a href="mysqlnd_memcache_set.html" class="function">mysqlnd_memcache_set()</a></span>,
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and the table mapping configuration that was automatically collected
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from the MySQL Server.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mysqlnd-memcache-get-config-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">connection</code></dt>
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<dd>
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<p class="para">
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A handle to a MySQL Server using one of the MySQL API extensions for PHP, which are
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<a href="ref.pdo_mysql.html" class="link">PDO_MYSQL</a>, <a href="book.mysqli.html" class="link">mysqli</a> or
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<a href="book.mysql.html" class="link">ext/mysql</a>.
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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-memcache-get-config-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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An array of mysqlnd_memcache configuration information on success, otherwise <strong><code>FALSE</code></strong>.
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</p>
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<p class="para">
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The returned array has these elements:
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</p>
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<p class="para">
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<table class="doctable table">
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<caption><strong><span class="function"><strong>mysqlnd_memcache_get_config()</strong></span> array structure</strong></caption>
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<thead>
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<tr>
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<th>Array Key</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>memcached</td>
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<td>
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Instance of Memcached associated to this MySQL connection
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by <span class="methodname"><a href="mysqlnd_memcache_set.html" class="methodname">mysqlnd_memcache_set()</a></span>. You can use this to
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change settings of the memcache connection, or directly by querying the
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server on this connection.
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</td>
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</tr>
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<tr>
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<td>pattern</td>
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<td>
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The PCRE regular expression used to match the SQL query sent to the server.
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Queries matching this pattern will be further analyzed to decide whether
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the query can be intercepted and sent via the memcache interface or
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whether the query is sent using the general MySQL protocol to the
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server. The pattern is either the default pattern
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(<em>MYSQLND_MEMCACHE_DEFAULT_REGEXP</em>) or it is set via
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<span class="function"><a href="mysqlnd_memcache_set.html" class="function">mysqlnd_memcache_set()</a></span>.
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</td>
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</tr>
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<tr>
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<td>mappings</td>
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<td>
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An associative array with a list of all configured containers as they
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were discovered by this plugin. The key for these elements is the name
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of the container in the MySQL configuration. The value is described
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below. The contents of this field is created by querying the MySQL
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Server during association to MySQL and a memcache connection using
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<span class="methodname"><a href="mysqlnd_memcache_set.html" class="methodname">mysqlnd_memcache_set()</a></span>.
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</td>
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</tr>
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<tr>
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<td>mapping_query</td>
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<td>An SQL query used during
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<span class="methodname"><a href="mysqlnd_memcache_set.html" class="methodname">mysqlnd_memcache_set()</a></span>
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to identify the available containers and mappings. The result of that
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query is provided in the mappings element.
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</td>
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</tr>
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</tbody>
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</table>
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<table class="doctable table">
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<caption><strong>Mapping entry structure</strong></caption>
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<thead>
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<tr>
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<th>Array Key</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>prefix</td>
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<td>
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A prefix used while accessing data via memcache. With the MySQL InnoDB
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Memcache Deamon plugin, this usually begins with @@ and ends with a
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configurable separator. This prefix is placed in front of the key value
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while using the memcache protocol.
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</td>
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</tr>
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<tr>
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<td>schema_name</td>
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<td>
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Name of the schema (database) which contains the table being accessed.
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</td>
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</tr>
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<tr>
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<td>table_name</td>
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<td>
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Name of the table which contains the data accessible via memcache
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protocol.
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</td>
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</tr>
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<tr>
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<td>id_field_name</td>
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<td>
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Name of the database field (column) with the id used as key when
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accessing the table via memcache. Often this is the database field
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having a primary key.
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</td>
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</tr>
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<tr>
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<td>separator</td>
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<td>
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The separator used to split the different field values. This is needed as
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memcache only provides access to a single value while MySQL can map
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multiple columns to this value.
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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The separator, which can be set in the MySQL Server configuration,
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should not be part of any value retrieved via memcache because proper
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mapping can't be guaranteed.
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</p>
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</p></blockquote>
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</td>
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</tr>
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<tr>
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<td>fields</td>
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<td>
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An array with the name of all fields available for this mapping.
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.mysqlnd-memcache-get-config-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-2366">
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<p><strong>Example #1 <span class="function"><strong>mysqlnd_memcache_get_config()</strong></span> example</strong></p>
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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 />$mysqli </span><span style="color: #007700">= new </span><span style="color: #0000BB">mysqli</span><span style="color: #007700">(</span><span style="color: #DD0000">"host"</span><span style="color: #007700">, </span><span style="color: #DD0000">"user"</span><span style="color: #007700">, </span><span style="color: #DD0000">"passwd"</span><span style="color: #007700">, </span><span style="color: #DD0000">"database"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$memc </span><span style="color: #007700">= new </span><span style="color: #0000BB">Memcached</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$memc</span><span style="color: #007700">-></span><span style="color: #0000BB">addServer</span><span style="color: #007700">(</span><span style="color: #DD0000">"host"</span><span style="color: #007700">, </span><span style="color: #0000BB">11211</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mysqlnd_memcache_set</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">, </span><span style="color: #0000BB">$memc</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">mysqlnd_memcache_get_config</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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array(4) {
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["memcached"]=>
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object(Memcached)#2 (0) {
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}
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["pattern"]=>
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string(125) "/^\s*SELECT\s*(.+?)\s*FROM\s*`?([a-z0-9_]+)`?\s*WHERE\s*`?([a-z0-9_]+)`?\s*=\s*(?(?=["'])["']([^"']*)["']|([0-9e\.]*))\s*$/is"
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["mappings"]=>
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array(1) {
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["mymem_test"]=>
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array(6) {
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["prefix"]=>
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string(13) "@@mymem_test."
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["schema_name"]=>
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string(4) "test"
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["table_name"]=>
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string(10) "mymem_test"
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["id_field_name"]=>
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string(2) "id"
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["separator"]=>
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string(1) "|"
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["fields"]=>
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array(3) {
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[0]=>
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string(2) "f1"
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[1]=>
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string(2) "f2"
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[2]=>
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string(2) "f3"
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}
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}
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}
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["mapping_query"]=>
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string(209) " SELECT c.name,
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CONCAT('@@', c.name, (SELECT value FROM innodb_memcache.config_options WHERE name = 'table_map_delimiter')) AS key_prefix,
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c.db_schema,
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c.db_table,
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c.key_columns,
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c.value_columns,
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(SELECT value FROM innodb_memcache.config_options WHERE name = 'separator') AS sep
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FROM innodb_memcache.containers c"
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}
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mysqlnd-memcache-get-config-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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<span class="methodname"><a href="mysqlnd_memcache_set.html" class="methodname" rel="rdfs-seeAlso">mysqlnd_memcache_set()</a> - Associate a MySQL connection with a Memcache connection</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> |