Naive OSX brew PHP switcher

sphp

#!/usr/bin/env bash

set -u
set -e
set -o pipefail

if [ $# -ne 1 ]; then
	echo "Usage: sphp [phpversion]"
	exit 1
fi

PHP_COMMAND="echo substr(phpversion(), 0, 3);"

CURRENT_VERSION=$(php -r "$PHP_COMMAND")
NEW_VERSION="$1"

if $(brew list php@"$NEW_VERSION" 2> /dev/null > /dev/null)
then
	echo "PHP version $NEW_VERSION found"

	echo "Unlinking old binaries..."
	brew unlink php@"$CURRENT_VERSION" 2> /dev/null > /dev/null

	echo "Linking new binaries..."
	brew link --force --overwrite php@"$NEW_VERSION"

	echo "Done."
else
	echo "PHP version $NEW_VERSION was not found."
	exit 1
fi