Fire up the AppleScript Editor and paste in the following (
adapted from this script):
Code:
set question to display dialog "Run script?" buttons {"Yes", "No"} default button 1
set answer to button returned of question
if answer is equal to "Yes" then
do shell script "php <insert script name with path>"
end if
Replace "<insert script name with path>" with the full name and path of the script. Test it out and make sure it works.
When it works to your needs, go to File > Save As > File Format > Application and save it somewhere. The product will work like any other application - double click it, respond to the prompt and enjoy.