As I suspected $_SESSION['myCart'] was never instantiated as an instance of the shoppingCart class. I was able to fix that one by adding the follow line to the top of shoppingcart.php
<?php
include("classinfo.php");
session_start();
//Add this line
if(!is_object($_SESSION["myCart"])) $_SESSION["myCart"] = new shoppingCart();
It seems to function now, I have not looked at the other pages though. ie, checkout.php Here is my revised copy of shoppingcart.php
<?php
include("classinfo.php");
session_start();
if(!is_object($_SESSION["myCart"])) $_SESSION["myCart"] = new shoppingCart();
if (isset($_POST["boolAdd"])) {
if ($_POST["boolAdd"] == "true") {
$boolSame = false;
$tempID = -1;
for ($x=0; $x < sizeof($_SESSION["myCart"]->arrBooks); $x++) {
if ($_SESSION["myCart"]->arrBooks[$x]->bookID == $_POST["bookid"]) {
$boolSame = true;
$tempID = $x;
}
}
if ($boolSame) {
$nextQuantity = 1 + $_SESSION["myCart"]->arrBooks[$tempID]->quantity;
$_SESSION["myCart"]->arrBooks[$tempID]->UpdateQuantity($nextQuantity);
} else {
$_SESSION["myCart"]->addBook($_POST["bookid"], $_POST["price"], $_POST["name"]);
}
} else if ($_POST["boolSubtract"] == "true") {
$nextQuantity = $_SESSION["myCart"]->arrBooks[$_POST["arrayid"]]->quantity - 1;
$_SESSION["myCart"]->arrBooks[$_POST["arrayid"]]->UpdateQuantity($nextQuantity);
} else if ($_POST["boolDelete"] == "true") {
array_splice ($_SESSION["myCart"]->arrBooks, $_POST["arrayid"], 1);
}
}
//////////
//Please enter data for your mysql setup below
$ServerLoc = "localhost";
$User = "admin";
$Password = "adminpass";
//////////
function getBooks($ServerLoc, $User, $Password) {
$conn = @mysql_connect($ServerLoc, $User, $Password);
$connRS = @mysql_select_db('bookdb', $conn);
$result = mysql_query("select * from books");
$numBooks = 0;
while($row = mysql_fetch_array($result))
{
$numBooks += 1;
if (($numBooks % 2) == 1) {
echo "<TR>";
}
?>
<TD WIDTH="50%">
<IMG SRC="<?php echo $row["bookImageLoc"]; ?>"><BR>
<b><?php echo $row["bookName"]; ?></b><BR><BR>
<FONT SIZE="-1">ISBN: <?php echo $row["bookISBN"]; ?></font><BR>
<FONT SIZE="-1">Authors: <?php echo $row["bookAuthors"]; ?></font><BR>
<FONT SIZE="-1">Price: <?php echo $row["bookPrice"]; ?></font><BR>
<FONT SIZE="-1">Page Count: <?php echo $row["bookPageCount"]; ?></font><BR>
<A HREF="javascript:addToCart('<?php echo $row["bookID"]; ?>','<?php echo $row["bookPrice"]; ?>', '<?php echo $row["bookName"]; ?>')"><IMG SRC="images/AddToCart.gif" WIDTH=100 HEIGHT=30 BORDER=0></A>
</TD>
<?php
if (($numBooks % 2) == 0) {
echo "</TR><TR><TD><BR><BR></TD><TD><BR><bR></TD></TR>";
}
}
}
?>
<HTML>
<HEAD>
<TITLE>Flash MX Shopping Cart</TITLE>
<SCRIPT>
function addToCart(bookid, price, name) {
document.form1.boolAdd.value = "true";
document.form1.bookid.value = bookid;
document.form1.name.value = name;
document.form1.price.value = price;
document.form1.submit()
}
</SCRIPT>
</HEAD>
<BODY>
<FONT SIZE="+3">Flash MX Shopping Cart Example</FONT><BR>
<TABLE WIDTH="100%" CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR><TD BGCOLOR="#CCCCCC"> </TD></TR>
</TABLE>
<BR>
<TABLE WIDTH="100%">
<TR VALIGN="TOP">
<TD>
<TABLE WIDTH="100%" BORDER=0>
<?php getBooks($ServerLoc, $User, $Password); ?>
</TABLE>
<BR><BR>
</TD>
<TD WIDTH=250>
<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0"
WIDTH="250" HEIGHT="400" id="ShoppingCart" ALIGN="">
<PARAM NAME=movie VALUE="ShoppingCart.swf">
<PARAM NAME=quality VALUE=high>
<PARAM NAME=bgcolor VALUE=#FFFFFF>
<PARAM NAME=FlashVars VALUE="<?php
for ($x=0; $x < sizeof($_SESSION["myCart"]->arrBooks); $x++) {
echo "&book";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->bookID;
echo "&bookPrice";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->bookPrice;
echo "&bookQuantity";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->quantity;
echo "&bookName";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->bookName;
}
echo "&numBooks=";
echo sizeof($_SESSION["myCart"]->arrBooks);
?>">
<EMBED src="ShoppingCart.swf" FlashVars="<?php
for ($x=0; $x < sizeof($_SESSION["myCart"]->arrBooks); $x++) {
echo "&book";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->bookID;
echo "&bookPrice";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->bookPrice;
echo "&bookQuantity";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->quantity;
echo "&bookName";
echo $x;
echo "=";
echo $_SESSION["myCart"]->arrBooks[$x]->bookName;
}
echo "&numBooks=";
echo sizeof($_SESSION["myCart"]->arrBooks);
?>" quality=high bgcolor=#FFFFFF WIDTH="250" HEIGHT="400" NAME="ShoppingCart" ALIGN="" TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED>
</OBJECT>
</TD>
</TR>
</TABLE>
<FORM NAME="form1" ACTION="shoppingcart.php" METHOD="POST">
<INPUT TYPE="HIDDEN" NAME="boolAdd" VALUE="false">
<INPUT TYPE="HIDDEN" NAME="bookid" VALUE="">
<INPUT TYPE="HIDDEN" NAME="name" VALUE="">
<INPUT TYPE="HIDDEN" NAME="price" VALUE="">
</FORM>
</BODY>
</HTML>