php5中没有问题,4中有问题,怎么改才能解决
//shopping1
<?php
session_start();
?>
<form action="shopping6.php" method="get" name=form1
<input type=hidden name=PageID value="1"><input type=hidden name=action value="a">
<input type=hidden name=TrackID value="1001587">
<input type="text" name="num"><br>
<b>
You have
<?php
//session_start();
if(!isset($_SESSION['cart_item']))
$_SESSION['cart_item']=0;
echo $_SESSION['cart_item']." ";
?>
item(s) in your Shopping Cart
</b>
<input type="submit" value="submit">
</form>