Error: php@7.4 has been disabled because it is a versioned formula!

首先找到文件

sudo vim  /opt/homebrew/Library/Taps/homebrew/homebrew-core/Formula/php@7.4.rb

找到disabel这一行，然后注释掉（就是在前面加个#）；

#  disable! date: "2022-11-28", because: :versioned_formula

然后执行安装命令即可！

brew install php@7.4