Archive for September 2008

ADDING ADDITIONAL IMAGES IN THE PRODUCT DETAILS PAGES -Virtuemart tips

If you are new to the virtue mart shopping cart software, the following steps will help you to add additional product images in Product details page.

Assumptions:
You are using,

  • Joomla 1.5 or Joomla 1.0.x
  • Virtue Mart 1.1.0 stable.

Steps to add additional images in Product details page:

  1. Go  to  virtue mart  admin panel
  2. Choose “choose extended layout” <helps easy navigation>
  3. List out your products.
  4. Click on media button. A new popup will be opened.
  5. Click the new button to add additional images
  6. Choose additional image s as option, give appropriate height and width for the image
  7. Click on save button. That’s all

I  am not sure about, it will work for lower version of virtue mart also. Please check and gimme a feed back to this post.

The following pictures help you for easy understanding.

ImageShack

ImageShack

ImageShack

ImageShack

ImageShack

ImageShack

Customizing the Read More link with WordPress

If you have set your WordPress site to display post excerpts on the front or home page, you will want visitors to click on the title or a link to encourage them to continue reading your post or article, right? WordPress makes this technique easy, and customizable.

Here is the steps:

  • Go to wordpress admin panel –> Design tab –> Theme Editor.
  • Select Main Index template (index.php) to edit it
  • Find the line  “<?php the_content(‘Read the rest of this entry &raquo;’); ?>”
  • And replace it with the following code.

<?php

$content = get_the_content($more_link_text, $stripteaser, $more_file);
if(strlen($content)>500) // chanage 500 as per your needs
{
$part_msg=substr($content, 0, 500);// chanage 500 as per your needs
echo ‘<p>’.$part_msg.’… ‘;
?>
<br /><br />
<a href=”<? comments_link(); ?>”>Read More…</a></div>
<?php
echo ‘</p>’;
}
else
{
echo ‘<p>’.$content.’</p></div>’;
}

?>

Where “500″ represents number of characters that you want to show.

If you cannot able to make the above changes with the wordpress theme editor, use your ftp.

Here is the template directory

/public_html/blog/wp-content/themes

or

/www/blog/wp-content/themes

where blog is the directory where i installed my wordpress

Magic with htaccess file – Increase execution time, session expiry time and file upload size limit

<IfModule mod_php5.c>
php_value post_max_size 5M
php_value upload_max_filesize 5M
php_value memory_limit 300M
php_value max_execution_time 259200
php_value max_input_time 259200
php_value session.gc_maxlifetime 1200
</IfModule>

php_value memory_limit 300M – Set higher default php_value memory_limit in .htaccess

upload_max_filesize 5M - it increases default upload limit. The default upload limit is 2MB. the above htaccess increase increases file limit 2mb to 5 mb

php_value max_execution_time:

Set the number of seconds a script is allowed to run. If this is reached,
the script returns a fatal error. The default limit is 30 seconds or, if it
exists, the max_execution_time value defined in the configuration file. If
seconds is set to zero, no time limit is imposed.

php_value session.gc_maxlifetime:

The session.gc_maxlifetime only sets the age of the session files that will be deleted when

garbage collection runs.

If you have a busy web site with a lot of sessions being created, garbage collection will

run based on session.gc_probability/session.gc_divisor. Despite this being called

“probability” I tested this and it is strictly a count. Using the default

gc_probability/gc_divisor of 1/100, this means that garbage collection will run every 100

new sessions (Edit: Actually this occurs within the session_start() coding and would count

re-started sessions as well) and delete any existing session files that are older than the

session.gc_maxlifetime. There is no file locking on the session files, so active session

files will be deleted and things like users getting logged out will occur.

If this is on shared hosting and the session files are all kept in the default location and

someone else is using a smaller session.gc_maxlifetime or a more frequent

gc_probability/gc_divisor, then any of the session files will get deleted based on the

lowest value of gc_maxlifetime and the most frequent gc_probability/gc_divisor.

You need to increase session.gc_maxlifetime or make session.gc_divisor larger and if this is

on shared hosting, set session.save_path to be a location within your web space.

Part of Page refresh using AJAX with timed delay

<head>
<script type=”text/javascript”>
function makAx() // this function to activate XMLHttpRequest Object
{
try
{
xm = new ActiveXObject(“Msxml2.XMLHTTP”);
return true;
}
catch (e)
{
try
{
xm = new ActiveXObject(“Microsoft.XMLHTTP”);
return true;
}
catch (e2)
{
xm = false;
}
}
if (!xm && typeof XMLHttpRequest != ‘undefined’)
{
xm = new XMLHttpRequest();
return true;
}
}
function showImages()
{
if(makAx()) // XMLHttpRequest checked here
{
url = “external-page-for-db-query.php”; // this file will contains your db query
callavail();
}
}
function callavail()
{
xm.open(“GET”,url,true); // This is ajax functionality. It may have true(for synchronous request) or false(for asynchronous request)
xm.onreadystatechange = cavail;
xm.send(null);
}
function cavail()
{
if(xm.readyState == 4) // If ready state reached
{
var response = xm.responseText;
var str = document.getElementById(“showResult”); // result of “external-page-for-db-query.php” will come here
str.innerHTML = response;
setTimeout(“showImages()”,1000); // here 1000 represents one second for time delay. showImage() function will be called with the specified time delay
}
}
</script>
</head>

<body>
<div id=”showResult”></div> <!–page result will be displayed here–>
</body>
</html>

Part of page refresh with time delay using MockAJAX – Facebook Developers

A Simple script that make our application works great. Yes, The following FBJS – FaceBook JavaScript will help you for part of page refresh in the facebook applications.

Uses:

1) Helps to retrieve data from your server database without refreshing the page
2) It would be useful for cricket scores and other live datas.

Mock AJAX Script as follows,

<script>

<!–
function partRefresh(){

var ajax = new Ajax();

ajax.responseType = Ajax.FBML;

ajax.ondone = function(data) {

document.getElementById(’partId’).setInnerFBML(data);

setTimeout(function() {partRefresh()},60000); // Making time delay

}
ajax.post(“http://www.example.com/filename.php”);
}
//–>
</script>

<div id=”partId”></div> // the output of filename.php is displayed here
<script>
partRefresh(); // Just calling the function on browser loads
</script>