Shopping cart without user login.

studioh3o

What im trying to do is construct a shopping cart that can be used without the user loging in .
what i have is when the user picks a certain product ex."male shirts" they are sent to a page that has a drop down list were they can choose which shirt they would like to look at and then they click the selct button and this pulls the image /description/and price from a databse. it also populates a hidden field with the product id. i have two buttons at the bottom of the page, one is a add to cart button and the other is a view cart button. how would i go about coding a shopping cart that doesn't require a login. any help would be great.

Mike

Mordecai

Use sessions that store all variables. Sessions are labeled by an ID, and that ID is unique. To use the session, just call session_start() on every page. To add a variable to the session, just use $_SESSION["variable"] = "value", like you would with any other array.

I'd suggest storing all items in an array, and putting the array into the session.

studioh3o

could you give me a quick sample code of this?
here is the code that i have on the pages that the vistor can go to.

top of page

<?php
if(empty($GET["select"])) {
$proid = 1;
}
else {
$proid=$GET["select"];
}
mysql_connect ("localhost","user","pass") or die(mysql_error() . "<B>Can't connect to the server</B>");
mysql_select_db("store") or die(mysql_error() . "<B>Specified database does NOT exist</B>");
$query = "select description, price, image, product_id from products WHERE product_id = $proid ";
$result = mysql_query($query) or die(mysql_error() . "<B>Bad Query</B>");
$num= mysql_num_rows($result);
do {
$img=$row['image'];
$desc=$row['description'];
$money=$row['price'];
$productid=$row['product_id'];
}
while($row = mysql_fetch_array($result));

in html codeing

<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td bgcolor="#FFFFFF" valign="top" align="center">
<form action="m_shirt.php" method="get" name="list" id="list">
<div align="center">
<select name="select">
<option value="1" selected>Truth</option>
<option value="2">Integrity</option>
<option value="3">Freedom</option>
<option value="4">Role Model</option>
<option value="5">Grace</option>
<option value="6">Authority</option>
<option value="7">Example</option>
<option value="8">Future</option>
</select>
<input type="image" name="Submit2" value="Select" src="images/select.jpg">
</div>
</form>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor="#99CCFF">
<table width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tr>
<td>
<center>
<?php echo"<img src=\"http://www.heismy.com/beta/test/images/male/$img\">";?>
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td valign="top" bgcolor="#99CCFF" height="11">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="center" valign="top" bgcolor="#FFFFFF">
<center>
<img src="images/male/back.jpg" width="396" height="364">
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor="#99CCFF" height="19">
<table width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tr>
<td>
<center>
<font face="Arial, Helvetica, sans-serif">
<?php echo"$desc"?>
</font>
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor="#99CCFF">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td bgcolor="#FFFFFF">
<center>
<font face="Arial, Helvetica, sans-serif">
<?php echo "$money"?>
</font>
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td height="25" bgcolor="#99CCFF">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td height="36" align="center" valign="top" bgcolor="#FFFFFF">
<center>
<font face="Arial, Helvetica, sans-serif"> </font>
<form name="form2" method="post" action="">
<input name="product_id" type="hidden" id="product_id" value=<?php echo "$productid" ?> >
</form>
<font face="Arial, Helvetica, sans-serif"><img src="images/add_cart.gif" width="74" height="22">
<img src="images/view_cart.gif" width="74" height="22">
</font>
</center>
</td>
</tr>
</table>
</td>
</tr>
</table>

Mordecai

At the top of every page, put session_start(). This calls the session, or creates a new one. This also sets the session id, which can be retrieved by using session_id(). If you do not use cookie-moded sessions (there's a setting in php.ini), then the session id will be added on to every link, or into every form.

When the person has no items (e.g. count($SESSION["items"]) will return 0 or an error(since it's not an array yet)) and wants to add an item, youll have to do something like this:
$SESSION["items"][] = $itemnumber; // Replace $itemnumber with whatever you're using to keep track of items

The empty [] just means that this should be added in the last open slot of the array, or the highest value.

To get all of the items that currently have (i.e. viewing the list), you'll have to loop through all of them:
for ($i=0;$i<count($SESSION["items"]);$i++) {
echo($SESSION["items"][$i]);
}

Hope this helps.

studioh3o

cool i'll try this out and let you know..
thanks
mike

studioh3o

ok Mordecai

im getting alittle confused.
here is the code that is before the html tags
<?php
session_start();
if(empty($GET["select"])) {
$proid = 1;
}
else {
$proid=$GET["select"];
}
mysql_connect ("localhost","user","pass") or die(mysql_error() . "<B>Can't connect to the server</B>");
mysql_select_db("store") or die(mysql_error() . "<B>Specified database does NOT exist</B>");
$query = "select description, price, image, product_id from products WHERE product_id = $proid ";
$result = mysql_query($query) or die(mysql_error() . "<B>Bad Query</B>");
$num= mysql_num_rows($result);
do {
$img=$row['image'];
$desc=$row['description'];
$money=$row['price'];
$productid=$row['product_id'];
}
while($row = mysql_fetch_array($result));

?>
here is my code that is in between my html tags...

<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td bgcolor="#FFFFFF" valign="top" align="center">
<form action="m_shirt.php" method="get" name="list" id="list">
<div align="center">
<select name="select">
<option value="1m" selected>Truth</option>
<option value="2m">Integrity</option>
<option value="3m">Freedom</option>
<option value="4m">Role Model</option>
<option value="5m">Grace</option>
<option value="6m">Authority</option>
<option value="7m">Example</option>
<option value="8m">Future</option>
</select>
<input type="image" name="Submit2" value="Select" src="images/select.jpg">
</div>
</form>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor="#99CCFF">
<table width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tr>
<td>
<center>
<?php echo"<img src=\"http://www.heismy.com/beta/test/images/male/$img\">";?>
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td valign="top" bgcolor="#99CCFF" height="11">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="center" valign="top" bgcolor="#FFFFFF">
<center>
<img src="images/male/back.jpg" width="396" height="364">
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor="#99CCFF" height="19">
<table width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF">
<tr>
<td>
<center>
<font face="Arial, Helvetica, sans-serif">
<?php echo"$desc"?>
</font>
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor="#99CCFF">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td bgcolor="#FFFFFF">
<center>
<font face="Arial, Helvetica, sans-serif">
<?php echo "$money"?>
</font>
</center>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td height="85" bgcolor="#99CCFF">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td height="79" align="center" valign="top" bgcolor="#FFFFFF">
<center>
<font face="Arial, Helvetica, sans-serif"> </font>
<form action="add_cart.php" method="post" name="form2" target="_self">
<p>
<input name="product_id" type="hidden" id="product_id" value=<?php echo "$productid" ?> >
</p>
<p>Sizes </p>
<p>
<input type="checkbox" name="checkbox" value="checkbox">
s
<input type="checkbox" name="checkbox2" value="checkbox">
m
<input type="checkbox" name="checkbox3" value="checkbox">
l
<input type="checkbox" name="checkbox4" value="checkbox">
xl
<input type="checkbox" name="checkbox5" value="checkbox">
2xl </p>
<p><font face="Arial, Helvetica, sans-serif"><img src="images/add_cart.gif" width="74" height="22"></font>
<font face="Arial, Helvetica, sans-serif"><img src="images/view_cart.gif" width="74" height="22"></font>
</p>
</form>

could you show me how i would code this to take the information and add it to a cart. im sure its simple but im just understanding it... thanks in advance

Mike