Count Items in array php sessions

PHP
1

Hi there,

I am building a cart system to display Quanties of items each item show if its one or more etc and i am having trouble of doing this i thought i can count each item but not sure how to go about doing it this is what i have atm



session_start();
error_reporting(E_ALL);
		$items=array();
		$cost=array();
include("dbconnect.php");
$cQuery="SELECT * FROM music WHERE type='0'";
$result=mysqli_query($con,$cQuery);
if(!$result)
{
	echo "Error:".mysqli_error($con);
}
else
{
	$count=$result->num_rows;
	if($count>0)
	{
		echo "<table border=\\"1\\">
		<tr>
			<th>Item Name</th>
			<th>Price</th>
			<th>Buy</th>
		</tr>
		";
		//
		
		//
		while($data=$result->fetch_assoc())
		{
			$items[]=$data['name'];
			$cost[]=$data['cost'];
			$id[]=$data['mid'];
		
		}
		
	}
	else
	{
		echo "<br/>There is no products in the catalog,Please contact the webmaster of this store";
	}
}
?>
<table border="1">
            	<tr>
                	<th colspan="2">Cart</th>
                </tr>
                <tr>
                    <th>Name</th>
                    <th>Price</th>
                </tr>
        	<?php
            $total = 0; // add up the total
            // list the quantities in the cart rather than the catalog
            for ($i = 0; $i <=count($_SESSION['cart']); $i++)
			{
				$qty_sum = 0;
				$cartitems = $items[$_SESSION['cart'][$i]];
				if($cartitems>=1)
				{
					$qty=count($cartitems);
					echo $qty;	
				}
			    echo '<tr><th>'.$items[$_SESSION['cart'][$i]].'</th>';
                echo '<th align="right">$'.number_format($cost[$_SESSION['cart'][$i]], 2).'</th></tr>';
                $total += $cost[$_SESSION['cart'][$i]];
            }
        ?>
            <tr>
                <th align="right">Total:</th>
                <th align="right">$<?php echo number_format($total, 2); ?></th>
            </tr>
            </table>

Am i doing somthing wrong here i tried to see if i could do a print_r on the session just it brought up 0 and 1 in each seperate array

What am i doing wrong can anyone help me out here?

Thanks,William