Change PHP version on MacOS

php.sh

#!/bin/bash

available=$(brew list --formula -1 | egrep '^php@|^php$')

syntax () {
	echo "SYNTAX: $0 <version>"
	echo ""
	echo -n "<version> needs to be one of: "
	echo $available
	echo ""
	echo "Choose the latest version of PHP by naming 'php' as the version"
	exit 2
}

# check if enough arguments
if [ "$#" -ne 1 ]; then
	syntax
fi

version=$(echo "${available}" | grep "${1}" | head -n 1)

# check if valid version
if [[ -z "$version" ]]; then
	syntax
fi

# do it
echo "Will use version $version"
echo $available | xargs brew unlink

# first default to a known 'safe' version, 
# otherwise we cannot always do the change
brew link [email protected]
valet use [email protected] --force

# now change to the requested version
valet use "$version" --force

@infostreams Thanks, this was really useful for me as I also use Laravel Valet. To run the script I did the following:

1. $ chmod +x php.sh
2. $ ./php.sh [email protected]
3. Enter sudo password

Notice having to use the @ symbol to install a PHP version as it didn't work first time around.