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Write a PHP program that presents a form with the first textbox requesting the person's name. In addition, ask the user to choose what country they would like to visit. You can limit your number of countries they choose from to five. If they fail to choose a country and submit the form send the user an error message and re-
present the form with the person’s name in the name textbox. When they choose a country and hit the submit button, present info about that country by calling a function. Then present the user with a list of three possible cities within that country. When the user selects a city present some basic info about the city by calling a function. Also, handle a submit request with no city and keep the name in the name textbox.