Creating the plugin PHP file

So now we need to write the PHP file that does all the hard work for this plugin and implements the functionality that we are trying to achieve. In your plg_content_clicktocall folder, create the file clicktocall.php with the following code:

<?php
defined('_JEXEC') or die;

jimport('joomla.plugin.plugin');

class plgContentClicktocall extends JPlugin
{
  function plgContentClicktocall( &$subject, $params )
  {
    parent::__construct( $subject, $params );
  }

  public function onContentPrepare($context, &$row, &$params, $page = 0)
  {
    // Do not run this plugin when the content is being indexed
    if ($context == 'com_finder.indexer')
    {
      return true;
    }

    if (is_object($row))
    {
      return $this->clickToCall($row->text, $params);
    }
    return $this->clickToCall($row, $params);
  }

  protected function clickToCall(&$text, &$params)
  {
    // matches 4 numbers followed by an optional hyphen or space...