本文介绍如何在UCenter 1.6.0_SC_UTF8环境下启用MySQL增强版扩展即Mysqli扩展。主要操作包括从Discuz_X3.2_SC_UTF8复制dbi.class.php及相关代码至UCenter和uc_client的指定目录，并修改model/base.php、api/dbbak.php、client.php和uc_base.php文件，通过判断mysqli_connect函数存在与否来动态加载相应的数据库类，从而实现Mysqli扩展的启用。
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