Let's talk about brew link's failure to change php version

藏色散人
Release: 2023-04-10 19:44:02
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This article will talk about the failure of brew link to change the php version. I hope it will be helpful to friends in need!

Problem description:

I installed three php versions through brew

php 5.6
php 7.4
php 8.0
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$ php -v

PHP 8.0.3 (cli) (built: Mar  4 2021 20:45:17) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.3, Copyright (c) Zend Technologies
    with Zend OPcache v8.0.3, Copyright (c), by Zend Technologies
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Disable 8.0 and use 7.4

$ brew unlink php@8.0 && brew link php@7.4
Unlinking /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
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It’s still the same version

It’s the same when I opened a new terminal 8.0.3

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

Where is the setting?

Analysis and solution:

You can try to install a PHP selector

brew update
brew upgrade
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Reference documentation

https://github.com/shivammathur/homebrew-php
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Install the specified php brew install shivammathur/php/php@7.3

Link php version brew link --overwrite --force php@7.3

If an error occurs

Warning: Already linked: <Cellar Path>
To relink:
  brew unlink <formula> && brew link <formula>
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Execute

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

apache brew services restart httpd
nginx brew services restart nginx
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Installation Result

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
    <FilesMatch \.php$>
        SetHandler application/x-httpd-php
    </FilesMatch>
Finally, check DirectoryIndex includes index.php
    DirectoryIndex index.php index.html
The php.ini and php-fpm.ini file can be found in:
    /usr/local/etc/php/7.0/
php@7.0 is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.
If you need to have php@7.0 first in your PATH run:
  echo &#39;export PATH="/usr/local/opt/php@7.0/bin:$PATH"&#39; >> ~/.zshrc
  echo &#39;export PATH="/usr/local/opt/php@7.0/sbin:$PATH"&#39; >> ~/.zshrc
For 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@7.0
Or, if you don&#39;t want/need a background service you can just run:
  php-fpm
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Welcome to discuss!

Recommended learning: "PHP Video Tutorial"

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source:segmentfault.com
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