Untitled

<?php
$inventory = array('milk', 'cheese', 'bread', 'soda', 'weed');

if(isset($_POST['submit'])) {//if form is submitted
	if (!in_array($_POST['order_txt'], array_keys($inventory)))
	{
		//item # specified wasn't in the list
	}
	else
	{
		$_SESSION['items'][] = $inventory[$_POST['order_txt']];
	}
}

var_dump($_SESSION);

echo "Welcome to Food Mart."."<br/><br/>";

echo "We carry the following items: "."<br/>";
for($x=0; $x<sizeof($inventory); $x++){
	echo $x . ":" . $inventory[$x]."<br/>";
}
echo "<br/>";
?>
<html>
<body>
<form action="<?php echo $PHP_SELF;?>" method="post">
Number of Item: <input type="text" name ="order_txt" />
<input type="submit" name="submit" value="Place Order"/>
</form>
</body>
</html>