Add button on item page

Hello

I search how to put a button on an item page.
On click on this button a php with the item id on parameter is executed on the server.
Have you an idea about to do that.
In first it is for all items and after i select the items (with sql update for example i didn’t need an ui for that)
I know php but not zend.

Thanks for your answers.
Have a good day.

jeremy.