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POCan't increment product's quantity in session object
 

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  1. POCan't increment product's quantity in session object
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    <p>I created an object, it's named carwash. I created a session and assigned that object for session, if I enter quantity then and press buy button, I have result (example 6):</p> <blockquote> <blockquote> <p>Your shopping cart contains 6 items.</p> </blockquote> </blockquote> <p>but when I enter nothing, I get:</p> <blockquote> <blockquote> <p>Your shopping cart contains items.</p> </blockquote> </blockquote> <p>How should I do? Thank you! Here is all my code:</p> <p>index.php <br /> PHP Code:</p> <pre><code>&lt;?php session_start(); require_once 'carwash.php'; if (isset($_SESSION['encoded_cartopass'])) { // first let's get the variable from the session $encoded_cartopass = $_SESSION['encoded_cartopass']; // now let's unpack it $cartopass = unserialize($encoded_cartopass); // echo quantity echo "Your shopping cart contains {$cartopass-&gt;getQuantity()} items. &lt;br /&gt;&lt;br /&gt;"; } else { echo "Your shopping cart contains 0 items. &lt;br /&gt;&lt;br /&gt;"; } ?&gt; &lt;form action="process.php" method="post"&gt; Quantity: &lt;input type="text" name="quantity" id="quantity"/&gt; &lt;input type="submit" value="Buy" name="submit" /&gt; &lt;/form&gt; </code></pre> <p>process.php <br /> PHP Code:</p> <pre><code>&lt;?php require_once 'carwash.php'; if (isset($_POST['submit'])) { if (!isset($_SESSION['encoded_cartopass'])) { // construct and set quantity $cartopass = new carwash(); $cartopass-&gt;setQuantity($_POST['quantity']); // construct and encode session session_register('encoded_cartopass'); $_SESSION['encoded_cartopass'] = serialize($cartopass); } else { // if session is existing, decode it and // increment quantity $encoded_cartopass = $_SESSION['encoded_cartopass']; $cartopass = unserialize($encoded_cartopass); $cartopass-&gt;incrementQuantity($_POST['quantity']); // encode class and assign to session and // session is used pass to index.php $_SESSION['encode_cartopass'] = serialize($cartopass); } } echo "&lt;script&gt;window.location.href='index.php'&lt;/script&gt;"; ?&gt; </code></pre> <p>carwash.php <br /> PHP Code:</p> <pre><code>&lt;?php class carwash { private $carmake; private $caryear; private $quantity; public function getCarmake() { return $this-&gt;carmake; } public function setCarmake($carmake) { $this-&gt;carmake = $carmake; } public function getCaryear() { return $this-&gt;caryear; } public function setCaryear($caryear) { $this-&gt;caryear = $caryear; } public function getQuantity() { return $this-&gt;quantity; } public function setQuantity($quantity) { $this-&gt;quantity = $quantity; } public function incrementQuantity($quantity = '') { if (empty($quantity)) { $this-&gt;quantity++; } else { $this-&gt;quantity += $quantity; } } public function washcar() { echo "scruba, dub, dub, scruba, dub, dub &lt;br /&gt;"; echo "I'm feelling cleaner, Thank you!"; } } ?&gt; </code></pre>
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    1. USPeeHaa
    1. USKiller Whale
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      1. VTUpMod
    1. COCan you do public function setQuantity($quantity = 0) { ?
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      1. POCan't increment product's quantity in session object
      1. USScott Yang
    2. COThank you!!!!!!
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      1. POCan't increment product's quantity in session object
      1. USKiller Whale
    3. COHa, I didn't think that would work, so I posted some alternative "display hacks". But glad you got it.
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      1. USScott Yang
 

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