Shopping Cart and Frames

Anon

I am using PHP and mysql to create a framed page with a shopping cart that is always visible.
Can anyone suggest the best method to update a frame that shows my shopping cart on the lower part of my screen, from a central frame that displays the catalogue. I have done it with the following method, however it refreshes the frame before the database is updated and therefore does not show the "new Add". It is not until the next "Add to cart" click that the frame refreshes with the original addition. The codes is as follows:

<head>

This is the line to Add:

<br>[<a href="../cart_add.php?id=<?=$prod->id?>"onClick=refresh_cart()>+ Add to Cart</a>]

With cart_add.php being:

<?
include("../application.php");

$SESSION["cart"]->add($id, 1);
$SESSION["cart"]->cleanup();
$SESSION["cart"]->recalc_total();

if (! empty($HTTP_REFERER)) {
header("Location: $HTTP_REFERER");
} else {
header("Location: $CFG->wwwroot");
}
?>

This code comes from a tutorial and I have been trying to modify it slightly. Any help would be great.

lehelgy

It's very easy:

if (! empty($HTTP_REFERER)) {
echo ("<script .....".
"doc1 = top.CartFrame.window.document;".
"doc1.open(\"shopping_cart.php\", \"CartFrame\", winsize);".
"self.location=$HTTP_REFERER;".
"</script");
} else {
// the same as above 🙂))
}

Anon

Thank you lehel for your quick response. I have tried implementing your suggestion in my file cart_add.php, but I get a Parse Error on the line:

echo ("<script language="Javascript">

I guess I have should have noted that I was a "newbie" to PHP/Java. Do you have any suggestions? My cart_add.php file now looks like this:

include("../application.php");

$SESSION["cart"]->add($id, 1);
$SESSION["cart"]->cleanup();
$SESSION["cart"]->recalc_total();

if (! empty($HTTP_REFERER)) {
echo ("<script language="Javascript">
"doc1 = top.Cartframe.window.document;"
"doc1.open(\"shopping_cart.php\", \"CartFrame\", winsize;"
"self.location=$HTTP_REFERER;;"
"</script");
} else {
header("Location: $HTTP_REFERER");
} else {
header("Location: $CFG->wwwroot");
}
?>

lehelgy

problem No.1

always protect your "-s in the strings:
ex:
echo ("<script language=\"JavaScript\">\n"

if you would like to join two strings use:
echo ("<script language=\"JavaScript\">\n".
" func1(1,2,3);\n".
" func2 (\"string\",2);\n".
"</script>\n");

this produces a clean HTML code:
<script language="JavaSCript">
func1(1,2,3);
func2 ("string",2);
</script>

lehelgy

include("../application.php");

$SESSION["cart"]->add($id, 1);
$SESSION["cart"]->cleanup();
$SESSION["cart"]->recalc_total();

if (! empty($HTTP_REFERER)) {
echo ("<script language=\"Javascript\">\n".
"doc1 = top.Cartframe.window.document;\n".
"doc1.open(\"shopping_cart.php\", \"CartFrame\", winsize);\n".
"self.location=$HTTP_REFERER;\n".
"</script>\n");
} else {
header("Location: $HTTP_REFERER");
} else {
header("Location: $CFG->wwwroot");
}
?

Anon

lehel, it feels like I am just about stalking you now. I hope that you are not sick of this. I have tried playing around with the revised code that you gave. However when I loaded it into my cart_add.php the way it was, I got a parse error on the second "else"

include("../application.php");

$SESSION["cart"]->add($id, 1);
$SESSION["cart"]->cleanup();
$SESSION["cart"]->recalc_total();

if (! empty($HTTP_REFERER)) {
echo ("<script language=\"Javascript\">\n".
"doc1 = top.CartFrame.window.document;\n".
"doc1.open(\"shopping_cart.php\", \"CartFrame\", winsize);\n".
"self.location=$HTTP_REFERER;\n".
"</script>\n");
} else {
header("Location: $HTTP_REFERER");
} else { #### Parse Error Here
header("Location: $CFG->wwwroot");
}
?>

I tried removing this line too, however when you click on a "Add", it neither refreshes the central frame, nor does it update the cart.

I also tried using the header("Location: $HTTP_REFERER"); as the first statement, and then the lines you supplied as the next "else" argument, however that did not refresh it either. Once again I had to remove the header("Location: $CFG->wwwroot"); line or I would get a parse error.

include("../application.php");

$SESSION["cart"]->add($id, 1);
$SESSION["cart"]->cleanup();
$SESSION["cart"]->recalc_total();

if (! empty($HTTP_REFERER)) {
header("Location: $HTTP_REFERER");
} else {
echo ("<script language=\"Javascript\">\n".
"doc1 = top.CartFrame.window.document;\n".
"doc1.open(\"shopping_cart.php\", \"CartFrame\", winsize);\n".
"self.location=$HTTP_REFERER;\n".
"</script>\n");
}
?>

The only difference that I can see is that the example that I gave set the "java language script function" and then later called it.

Ie <area shape="rect" coords="362,340,448,361" ref="../cart_add.php?id=1"onClick=frmsubmit('recalc')>

Could that have anything to do with it still not refreshing. I have attched my index.php file that sets up all of my frames. Maybe this may shed some light. Is there any other information that I could give you to help??

**
index.php

<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

</head>
<frameset rows="80,*" frameborder="NO" border="0" framespacing="0">
<frame name="topFrame" scrolling="NO" noresize src="../templates/footer.php" >

<frameset rows="*,80" frameborder="NO" border="0" framespacing="0"> 
  <frame name="ContentFrame" src="templates/catalog.php">
  <frame name="CartFrame" scrolling="AUTO" src="templates/shopping_cart.php">

</frameset>
</frameset>

lehelgy

<?
include("../application.php");

$SESSION["cart"]->add($id, 1);
$SESSION["cart"]->cleanup();
$SESSION["cart"]->recalc_total();

echo ("<script language=\"Javascript\">\n");

if (! empty($HTTP_REFERER)) {
echo (
"top.CartFrame.location=\"shopping_cart.php\" ;\n".
"self.location=\"$HTTP_REFERER\";\n");
} else {
echo (
"top.CartFrame.location=\"shopping_cart.php\" ;\n".
"self.location=\"$CFG->wwwroot\";\n");
}