Finder で指定したフォルダをルートとしてローカルサーバを起動する ref: http://qiita.com/hideyukisaito/items/03c46c075151947f3569

file0.applescript

on run {argv}
    display dialog "Enter port number" default answer "8888"
    set targetPort to text returned of result

    tell application "Terminal"
        set currentTab to do script "cd " & (argv)'s POSIX path
        delay 1
        do script "php -S localhost:" & targetPort in currentTab
    end tell
end run