第一次全新安装成功,第二次删除本地文件,覆盖安装输入同样的数据库密码,会出错

Fatal error: Uncaught PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'nwnuyhs' for key 'app_users.username' in D:\wwwroot\bbs1.com\app\setup\setup.func.php:230 Stack trace: #0 D:\wwwroot\bbs1.com\app\setup\setup.func.php(230): PDOStatement->execute(Array) #1 D:\wwwroot\bbs1.com\index.php(4848): setup_install_run() #2 {main} thrown in D:\wwwroot\bbs1.com\app\setup\setup.func.php on line 230

建议:修改为:自动检测是否有安装记录,如果有安装记录,直接用之前的账号登录,和wordpress的安装逻辑一样

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