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147 lines
7.1 KiB
HTML
147 lines
7.1 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>Converts a MySQL connection handle into a mysqlnd connection handle</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-uh-convert-to-mysqlnd" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mysqlnd_uh_convert_to_mysqlnd</h1>
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<p class="verinfo">(PECL mysqlnd-uh >= 1.0.0-alpha)</p><p class="refpurpose"><span class="refname">mysqlnd_uh_convert_to_mysqlnd</span> — <span class="dc-title">Converts a MySQL connection handle into a mysqlnd connection handle</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mysqlnd-uh-convert-to-mysqlnd-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_uh_convert_to_mysqlnd</strong></span>
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( <span class="methodparam"><span class="type"><a href="class.mysqli.html" class="type mysqli">mysqli</a></span> <code class="parameter reference">&$mysql_connection</code></span>
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) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">
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Converts a MySQL connection handle into a mysqlnd connection handle.
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After conversion you can execute mysqlnd library calls on the connection handle.
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This can be used to access mysqlnd functionality not made available
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through user space API calls.
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</p>
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<p class="para">
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The function can be disabled with
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<em><a href="mysqlnd-uh.configuration.html#ini.mysqlnd-uh.enable" class="link">mysqlnd_uh.enable</a></em>.
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If <em><a href="mysqlnd-uh.configuration.html#ini.mysqlnd-uh.enable" class="link">mysqlnd_uh.enable</a></em>
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is set to <strong><code>FALSE</code></strong> the function will not install the proxy and
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always return <strong><code>TRUE</code></strong>. Additionally, an error of the
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type <em>E_WARNING</em> may be emitted. The error message may
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read like <em>PHP Warning: mysqlnd_uh_convert_to_mysqlnd(): (Mysqlnd User Handler)
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The plugin has been disabled by setting the configuration parameter mysqlnd_uh.enable = false.
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You are not allowed to call this function [...]</em>.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mysqlnd-uh-convert-to-mysqlnd-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">MySQL connection handle</code></dt>
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<dd>
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<p class="para">
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A MySQL connection handle of type mysql, mysqli or PDO_MySQL.
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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-uh-convert-to-mysqlnd-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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A mysqlnd connection handle.
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.mysqlnd-uh-convert-to-mysqlnd-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</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>5.4.0</td>
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<td>
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The <code class="parameter">mysql_connection</code> parameter can now be of type
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<em>mysql</em>, <em>PDO_MySQL</em>, or <em>mysqli</em>.
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Before, only the <em>mysqli</em> type was allowed.
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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-uh-convert-to-mysqlnd-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-2361">
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<p><strong>Example #1 <span class="function"><strong>mysqlnd_uh_convert_to_mysqlnd()</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 /></span><span style="color: #FF8000">/* PDO user API gives no access to connection thread id */<br /></span><span style="color: #0000BB">$mysql_connection </span><span style="color: #007700">= new </span><span style="color: #0000BB">PDO</span><span style="color: #007700">(</span><span style="color: #DD0000">"mysql:host=localhost;dbname=test"</span><span style="color: #007700">, </span><span style="color: #DD0000">"root"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Convert PDO MySQL handle to mysqlnd handle */<br /></span><span style="color: #0000BB">$mysqlnd </span><span style="color: #007700">= </span><span style="color: #0000BB">mysqlnd_uh_convert_to_mysqlnd</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysql_connection</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Create Proxy to call mysqlnd connection class methods */<br /></span><span style="color: #0000BB">$obj </span><span style="color: #007700">= new </span><span style="color: #0000BB">MySQLndUHConnection</span><span style="color: #007700">();<br /></span><span style="color: #FF8000">/* Call mysqlnd_conn::get_thread_id */<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$obj</span><span style="color: #007700">-></span><span style="color: #0000BB">getThreadId</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysqlnd</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">/* Use SQL to fetch connection thread id */<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysql_connection</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT CONNECTION_ID()"</span><span style="color: #007700">)-></span><span style="color: #0000BB">fetchAll</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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int(27054)
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array(1) {
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[0]=>
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array(2) {
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["CONNECTION_ID()"]=>
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string(5) "27054"
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[0]=>
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string(5) "27054"
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}
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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-uh-convert-to-mysqlnd-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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<em><a href="mysqlnd-uh.configuration.html#ini.mysqlnd-uh.enable" class="link">mysqlnd_uh.enable</a></em>
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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> |