I was following a couple links that had this same sequence, namely this example. I was unable to get it done successfully. Here is the output from terminal
MacBook-Pro-4:/ SHennessy$ brew tap homebrew/dupes
MacBook-Pro-4:/ SHennessy$ brew tap homebrew/versions
MacBook-Pro-4:/ SHennessy$ brew tap homebrew/homebrew-php
MacBook-Pro-4:/ SHennessy$ brew unlink php56
Error: No such keg: /usr/local/Cellar/php56
MacBook-Pro-4:/ SHennessy$ brew install php70
==> Installing php70 from homebrew/php
Error: You must `brew link libpng` before homebrew/php/php70 can be installed
MacBook-Pro-4:/ SHennessy$ brew link php70
Error: No such keg: /usr/local/Cellar/php70
MacBook-Pro-4:/ SHennessy$
If anybody has any ideas that would be awesome, thanks in advance.
For MacOS Monterey I faced a similar issue /usr/local/Cellar/php
while switching between different php versions
Following steps help me to fix my issue
Step 1
After installing php first link that particular version
brew link php@7.3 //Whatever you installed
Step 2
Switching to another php version use the following commands
brew unlink php@7.3 //Whatever is your current active version
brew link --overwrite --force php@7.4 //Whatever your desired version
Or you can use single command
brew unlink php@7.3 && brew link --overwrite --force php@7.4