Functions - Just Can't Get It Right

Language: PHP
display($movie, $time, $drink, $ticket, $category);
function display($movie, $time, $drink, $ticket, $category)
 
display();
function display()

Language: PHP
// this will generate the error notice
$movie=$_POST[';movie';];
echo "$movie"; //or use $movie
 
 
// this is the correct way 
if(isset($_POST[';movie';])){
$movie=$_POST[';movie';];
}
echo "$movie";  //or use $movie

Language: PHP
if(isset($_REQUEST[';movie';])) {
	foreach ($_REQUEST[';movie';] as $yourmovie)
	{
		display($yourmovie);
		function display($yourmovie)
		{
			echo "Movie : ". $yourmovie;
		}
	}
}

Language: PHP
function display($yourmovie)
    {
          echo "Movie : ". $yourmovie;
    }
 
 
if(isset($_REQUEST[';movie';])) {
	foreach ($_REQUEST[';movie';] as $yourmovie)
	{
	display($yourmovie);
	}
}