MySQL服务器在自制升级后消失了

我刚做了一个 brew upgrade 到PHP 7.2.8和MySQL 8.0.12。在此之后,尝试从PHP脚本(从Bash)连接到MySQL会在10秒后超时(默认MySQL超时值)。

new PDO("mysql:host=localhost;dbname=foo;charset=utf8", "user", "pass");

[2006] MySQL server has gone away

我周围的一切似乎都很正常。我没有改变我的设置。从Bash连接到MySQL很好。如何从PHP重新获得MySQL访问权限?

$ php -i | grep php.ini
Configuration File (php.ini) Path => /usr/local/etc/php/7.2
Loaded Configuration File => /usr/local/etc/php/7.2/php.ini

$ tail /usr/local/etc/php/7.2/php.ini
mysql.default_socket = /tmp/mysql.sock
pdo_mysql.default_socket = /tmp/mysql.sock

$ ls /tmp/mysql*
srwxrwxrwx  0 /tmp/mysql.sock
-rw-------  5 /tmp/mysql.sock.lock
srwxrwxrwx  0 /tmp/mysqlx.sock
-rw-------  6 /tmp/mysqlx.sock.lock

$ mysql
Welcome to the MySQL monitor.
mysql> show variables like '%socket%';
+-----------------------------------------+------------------+
| mysqlx_socket                           | /tmp/mysqlx.sock |
| socket                                  | /tmp/mysql.sock  |
+-----------------------------------------+------------------+