PHP switcher

sphp.sh

#!/bin/bash

# Check if command was run as root.
if [[ $(id -u) -eq 0 ]]; then
    echo "The command \"sphp\" should not be executed as root or via sudo directly."
    echo "When a service requires root access, you will be prompted for a password as needed."
    exit 1
fi

# Usage
if [[ $# -ne 1 ]]; then
    echo "Usage: sphp [phpversion]"
    echo "Versions installed:"
    brew list | grep -E '^php(\@|$)' | while read -r line ; do
        echo " - phpversion: $line"
    done
    exit 1
fi

currentVersion="php@$(php -r "error_reporting(0); echo substr(phpversion(), 0, 3);")"
newVersion="$1"

if ! brew list "${newVersion}" &> /dev/null; then
    echo "PHP version $newVersion was not found."
    echo "Try \`brew install ${newVersion}\` first."
    exit 1
fi

if [[ "${currentVersion}" == "$newVersion" ]]; then
    echo "PHP version $newVersion is already active."
    exit 1
fi

echo "PHP version $newVersion found"

echo "Unlinking old binaries..."
brew unlink "${currentVersion}" &> /dev/null

echo "Linking new binaries..."
brew link --force --overwrite "${newVersion}" &> /dev/null

echo "Done."

# Show PHP CLI version for verification.
echo && php -v

Pulled out Apache stuff (only use it virtually), deleted commented out code, and ran what was left through shellcheck.