怎么解决brew link更换php版本失败问题

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问题描述：

我透過 brew 安裝三種php版本

php 5.6php 7.4php 8.0

$ php -v

PHP 8.0.3 (cli) (built: Mar  4 2021 20:45:17) ( NTS )Copyright (c) The PHP GroupZend Engine v4.0.3, Copyright (c) Zend Technologies    with Zend OPcache v8.0.3, Copyright (c), by Zend Technologies

停用8.0使用7.4

$ brew unlink php@8.0 && brew link php@7.4Unlinking /usr/local/Cellar/php/8.0.3... 0 symlinks removed.Linking /usr/local/Cellar/php@7.4/7.4.16... 264 symlinks created.$ php -v

還是一樣版本

我開新的終端機也是一樣8.0.3

PHP 8.0.3 (cli) (built: Mar  4 2021 20:45:17) ( NTS )Copyright (c) The PHP GroupZend Engine v4.0.3, Copyright (c) Zend Technologies    with Zend OPcache v8.0.3, Copyright (c), by Zend Technologies

中規中矩操作了

這是哪裏有少設置了？

分析解决：

你可以尝试安装一个PHP选择器

brew updatebrew upgrade

参考文档

https://github.com/shivammathur/homebrew-php

安装指定php brew install shivammathur/php/php@7.3

链接php版本 brew link --overwrite --force php@7.3

如果出现报错

Warning: Already linked: To relink:  brew unlink  && brew link 

执行

brew unlink php@7.3brew link --overwrite --force php@7.3

重启服务

apache brew services restart httpdnginx brew services restart nginx

安装结果

To enable PHP in Apache add the following to httpd.conf and restart Apache:    LoadModule php7_module /usr/local/opt/php@7.0/lib/httpd/modules/libphp7.so            SetHandler application/x-httpd-php    Finally, check DirectoryIndex includes index.php    DirectoryIndex index.php index.htmlThe php.ini and php-fpm.ini file can be found in:    /usr/local/etc/php/7.0/php@7.0 is keg-only, which means it was not symlinked into /usr/local,because this is an alternate version of another formula.If you need to have php@7.0 first in your PATH run:  echo 'export PATH="/usr/local/opt/php@7.0/bin:$PATH"' >> ~/.zshrc  echo 'export PATH="/usr/local/opt/php@7.0/sbin:$PATH"' >> ~/.zshrcFor compilers to find php@7.0 you may need to set:  export LDFLAGS="-L/usr/local/opt/php@7.0/lib"  export CPPFLAGS="-I/usr/local/opt/php@7.0/include"To have launchd start shivammathur/php/php@7.0 now and restart at login:  brew services start shivammathur/php/php@7.0Or, if you don't want/need a background service you can just run:  php-fpm

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