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POUse AJAX to update records in database
 

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  1. POUse AJAX to update records in database
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    <p>I have a shopping cart website where the user can add items to his cart. For each item, I have a drop-down list where the user can update the number of items. This is the loop where I show the drop-down list, and marks selected the quantity the user has added to his cart. (<em>quantity available</em> is for the amount of products, while <em>quantity</em> is for the user amount of that product).</p> <p><strong>cart.php</strong></p> <pre><code>echo '&lt;select name="product' . $prod_row["product_id"] . '"&gt;'; for ($i = 1; $i &lt;= $prod_row["quantity_available"]; $i++) { echo '&lt;option value="' . $i . '"'; if ($i == $cart_row["quantity"]) { echo ' selected="selected"'; } echo '&gt;' . $i . '&lt;/option&gt;'; } echo '&lt;/select&gt;'; </code></pre> <p>On the drop-down list <code>onchange</code> I wish to make an AJAX call to update the quantity. I have this Javascript method which I took from <a href="http://www.w3schools.com/php/php_ajax_database.asp" rel="nofollow">W3Schools</a>.</p> <pre><code>function updateCartQuantity(qty, cartid) { if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 &amp;&amp; xmlhttp.status==200) { } } xmlhttp.open("GET","updatecart.php?qty="+qty+"&amp;cartid="+cartid,true); xmlhttp.send(); } &lt;/script&gt; </code></pre> <p>How can I modify this Javascript method to cater for the update of a record?</p>
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    1. USchris05
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    1. COhow are you updating the cart in your website? do u have any cart.php?
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      1. USRajesh Pantula
    2. COAll the update occurs in the `updatecart.php`. Or it isn't the right logic?
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      1. POUse AJAX to update records in database
      1. USchris05
    3. COit is perfectly fine, i was just curious if you had a separate updatecart.php or not? your code seems to be perfect, what problem are you facing?
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      1. POUse AJAX to update records in database
      1. USRajesh Pantula
 

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