Run multiple PHP development servers in separate new screen sessions/tabs

Run several PHP development servers on different ports by sending commands to tabs in screen.

screen_name="my_screen"
server_count=5

# Start screen in detached mode with a session name.
byobu-screen -S "${screen_name}" -t "master" -d -m

# Wait for screen to be ready before opening new sessions.
sleep 1

# Create tabs and send commands to each.
for i in $(seq 1 "${server_count}"); do
    # Create tab.
    byobu-screen -S "${screen_name}" -X "screen" -t "my_screen_${i}"

    # Start development server in tab.
    port=8000
    (( port += $i ))
    command="php -S 127.0.0.1:${port}"
    byobu-screen -S "${screen_name}" -p "my_screen_${i}" -X stuff "${command}"$'\n'
done

byobu-screen

The following commands will be run in separate tabs:

php -S 127.0.0.1:8001
php -S 127.0.0.1:8002
php -S 127.0.0.1:8003
php -S 127.0.0.1:8004
php -S 127.0.0.1:8005