我尝试使用brew安装php@7.3。但是，它返回错误，因为它是版本化公式。它是什么？
命令：brew install php@7.3
brew install php@7.3
结果：Error: php@7.3 has been disabled because it is a versioned formula!
Error: php@7.3 has been disabled because it is a versioned formula!
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