shooping cart using sessions

eddy

i have created a very simple shopping cart, ive been using php 4.2.3. and using win xp, i have a file called SessionTrolley.php, i have been unable to add any thing to the cart, can anyone help

<?php
error_reporting(1); // suppress warning messages
session_start(); // Initialise session
session_register("trolleyContents"); // Register our variables
?>

<html><head><title>PHP session example</title>
</head><body>
<h2 align="center">Shopping trolley (php session version)</h2>
<form method="post" action="SessionTrolley.php?<?php echo SID ?>">
Choose an item: </p>
<input type="radio" name="choice" value="camera" /> camera<br />
<input type="radio" name="choice" value="snorkel" /> snorkel<br />
<input type="radio" name="choice" value="octopus" /> octopus<br />
<input type="radio" name="choice" value="cuddly toy" /> cuddly toy<br /><br />
<input type="submit" name="submit" value="Add to the trolley" />
<input type="submit" name="clear" value="Empty the trolley" /><br />
</form>

<?php
if ((!$trolleyContents && !$choice) || $clear) {
$trolleyContents = "";
echo "<p>Trolley currently empty</p>";
} else {
if ( $choice ) $trolleyContents = $trolleyContents . "<li>$choice</li>";
echo "<p>Trolley contains:</p>";
echo "<ul>$trolleyContents</ul>";
}
?>
</body></html>

Weedpacket

Looks more or less all right at first glance - assuming several things about your configuration.

What happens if you let PHP issue warnings?

sONOCOOLO

Hi,

I've always learned that the "session_start();" function must be at the top of your code. So it should be above "error_reporting(1);"

Secondly perhaps the following might work (I know it works ;-)):

<?php 
session_start(); // Initialise session 
if ($HTTP_POST_VARS["choice"]) {
	$trolleyContents[count($trolleyContents)] = $HTTP_POST_VARS["choice"];
	session_register("trolleyContents"); // Register our variables 
} elseif ($HTTP_POST_VARS["clear"]) {
	session_unregister("trolleyContents"); // Un-register our variables 
} else {
	session_register("trolleyContents");
}
error_reporting(1); // suppress warning messages 
?> 

<html><head><title>PHP session example</title> 
</head><body> 
<h2 align="center">Shopping trolley (php session version)</h2> 
<form method="post" action="trolly.php"> 
Choose an item: </p> 
<input type="radio" name="choice" value="camera" /> camera<br /> 
<input type="radio" name="choice" value="snorkel" /> snorkel<br /> 
<input type="radio" name="choice" value="octopus" /> octopus<br /> 
<input type="radio" name="choice" value="cuddly toy" /> cuddly toy<br /><br /> 
<input type="submit" name="submit" value="Add to the trolley" /> 
<input type="submit" name="clear" value="Empty the trolley" /><br /> 
</form> 

<?php 
if (!$trolleyContents || $clear) { 
	echo "<p>Trolley currently empty</p>"; 
} else { 
	echo "<p>Trolley contains:</p>"; 
	echo "<ul>";
	$i = 0;
	While ($trolleyContents[$i]) {
		echo "<li>" . $trolleyContents[$i] . "</li>";
		$i++;
	}
	echo "</ul>";
}
?> 
</body></html>