Php Can'；我不能在我的个人计算机上连接到我的数据库，但它可以在其他计算机上工作

无法使用XAMPP连接到MySQL

此脚本：

 <?php
   if(!$con = mysqli_connect("localhost", "root", ""))
      die("failed to connect");    
 ?>

根帐户确实没有密码；我可以通过shell登录MySQL：

# mysql -u root
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 29
Server version: 10.4.17-MariaDB mariadb.org binary distribution

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

我尝试添加这一行--

$cfg['Servers'][$I]['auth_type']='HTTP'到config.inc.php
（见附件）。
没有效果

这可能是相关的：通过XAMPP启动MySQL时出现的错误：

9:53:17 AM  [mysql]     Problem detected!
9:53:17 AM  [mysql]     Port 3306 in use by "Unable to open process"!
9:53:17 AM  [mysql]     MySQL WILL NOT start without the configured ports free!
9:53:17 AM  [mysql]     You need to uninstall/disable/reconfigure the blocking application
9:53:17 AM  [mysql]     or reconfigure MySQL and the Control Panel to listen on a different port

看起来您已经为root用户设置了密码。@Jens，那么他们为什么能够通过MySQL CLI客户端登录？不，root用户没有密码。这可能与此相关：“-如果MySQL甚至没有启动，那么如果您也无法连接到它，这应该不会太令人惊讶。@Dharman可能他们已经运行了一个不同的实例，或者类似的。
9:53:17 AM  [mysql]     Problem detected!
9:53:17 AM  [mysql]     Port 3306 in use by "Unable to open process"!
9:53:17 AM  [mysql]     MySQL WILL NOT start without the configured ports free!
9:53:17 AM  [mysql]     You need to uninstall/disable/reconfigure the blocking application
9:53:17 AM  [mysql]     or reconfigure MySQL and the Control Panel to listen on a different port