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The
most commonly used content event is onPrepareContent. This event, always the
first of all the content events to be triggered, is used to modify the text content.
Let's imagine we want to create a content plugin which will replace all occurrences
of ':)' with a small smiley face icon. This is how we could implement this:
// no direct access
defined('_JEXEC') or die('Restricted access');
// register the handler
$mainframe->registerEvent('onPrepareContent',
'plgContentSmiley');
/**
* Replaces :) with a smiley icon.
*
* @param object Content item
* @param JParameter Content parameters
* @param int Page number
*/
function plgContentSmiley(&$row, &$params, $page)
{
$pattern = '/\:\)/';
$icon = '';
$row->text = preg_replace($pattern, $icon, $row->text);
}
Notice that we do not return the changes, we modify the referenced $row object.
The $row object is the content item; it includes a great many attributes. This table
describes the attributes that we are most likely to modify:
Attribute Description
created Created date and time in the format 0000-00-00 00:00:00.


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