Brew helper for switching php versions

setphp.sh

# Requires ZSH

# Install your PHP versions via: brew install php@x.x
# Where x.x is the version such as 7.4
# Do not need to link them it's harmless
# Add the below to your .profile or something
# Then run setphp x.x when you need to change php version - it will update php version in all terminal sessions

# Add to PATH to prefer over any system installed
export PATH="$HOME/bin/php:$PATH"

# Configure latest PHP version
setphp() {
	local SELECTED PHPPATH UTILITY
	SELECTED=$1

	if [ -z "$SELECTED" ]; then
		SELECTED=$(xargs -n 1 echo <<<"$(echo /usr/local/opt/php@*)" | sort -n | tail -1)
		SELECTED=${SELECTED#/usr/local/opt/php@}
	fi

	if [ -z "$SELECTED" ]; then
		echo 'No PHP versions could be found' >&2
		return 1
	fi

	PHPPATH="/usr/local/opt/php@$SELECTED"
	if [ ! -d "$PHPPATH/bin" ]; then
		echo 'Requested PHP version is not installed' >&2
		return 1
	fi

	mkdir -p ~/bin/php
	for UTILITY in ~/bin/php/*(N); do
		command rm -f "$UTILITY" >/dev/null 2>&1
	done

	for UTILITY in "$PHPPATH"/*bin/*; do
		if [ "$UTILITY" = "$PHPPATH/bin/php-config" ]; then
			# Stop brew doctor complaints
			continue
		fi
		if [ "$UTILITY" = "$PHPPATH/bin/php" ]; then
			# Adjust this as needed to add ini modifications that will affect any version
			# Easier than having to mess with ini files in brew home
			cat <<EOF >~"/bin/php/$(basename "$UTILITY")"
#!/bin/bash
"$UTILITY" -d memory_limit=4G "\$@"
EOF
			chmod a+x ~"/bin/php/$(basename "$UTILITY")"
			continue
		fi
		ln -nsf "$UTILITY" ~/bin/php/
	done

	# Cleanup cached paths
	hash -r
}