Step 1: Go to the top of this page to the search box

Step 2: Enter 'Google Translate API PHP' and click on the Search button

Step 3:Look at the list and find the snippet titled: PHP Class for Google AJAX Language API (Language Translation)

Step 4: If that doesn't fit your need, look at the other items listed and if still isn't what you need, then try the same search on Google or try another without Google in the search string.

That wasn't too difficult was it?