怎么用 mysqli::get_charset 来检查数据库连接的字符集是否设置正确？

<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 前置无关内容</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"这是一些无关的前置信息，可以包含广告或调试信息。\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"更多无关内容……\n"</span></span><span>;
</span><span><span class="hljs-meta">?></span></span><span>

<hr>

</span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// 文章正文开始</span></span><span>

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<h1>怎么用 mysqli::get_charset 来检查数据库连接的字符集是否设置正确？</h1>"</span></span><span>;

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<p>在 PHP 中使用 <code>mysqli

\$charset = \$mysqli->get_charset();
if (\$charset) {
    echo '当前字符集: ' . \$charset->charset;
} else {
    echo '无法获取字符集信息';
}

if (!\$mysqli->set_charset('utf8mb4')) {
    echo '设置字符集失败: ' . \$mysqli->error;
} else {
    echo '字符集已成功设置为 utf8mb4';
}