In a custom module I'm inserting universal analytics so I have to change a few functions from Ga.php file

In Ga.php there is:

class Mage_GoogleAnalytics_Block_Ga extends Mage_Core_Block_Template
//google analytics functions

If I do like this:

class Custom_Module_Block_Universalanalytics extends Mage_GoogleAnalytics_Block_Ga{ 
//a couple of functions that I change from Ga.php

it doesn't work.

But if I do like this:

class Custom_Module_Block_Universalanalytics extends Mage_Core_Block_Template{  
//all functions from Ga.php plus the ones that I change

it does work.

So my question is why wouldn't it work if I extend the Mage_GoogleAnalytics_Block_Ga class which already has all the functions?

Update: Here is my config.xml

<?xml version="1.0"?>


Update: Folowing the comments, indeedthe issue is with this function:

protected function _toHtml(){
    if (!Mage::helper('universalanalytics')->isUniversalanalyticsAvailable()) {
        return '';
    return parent::_toHtml();

Mage::helper('universalanalytics')->isUniversalanalyticsAvailable() is returning true, but, as I read here https://stackoverflow.com/questions/11179732/overwritten-block-appears-in-addition-to-module-overwrite return parent::_toHtml(); will return the google classic analytics object.

  • please show your Custom_Module module config.xml code? – Amit Bera May 18 '15 at 9:49
  • @AmitBera done that – Claudiu Creanga May 18 '15 at 9:51
  • Are you sure this Mage::helper('googleanalytics')->isGoogleAnalyticsAvailable()) is returning true? If not, the toHtml function will return an empty string. – Fran Mayers May 18 '15 at 10:06
  • how you have call Custom_Module_Block_Universalanalytics file in your code? – Amit Bera May 18 '15 at 10:09
  • @Mayers I've created Mage::helper('universalanalytics')->isUniversalanalyticsAvailable() which is returning true. I want the client to be able to control it from the admin. – Claudiu Creanga May 19 '15 at 7:55

In the class that you extend, there is a _toHtml function that will return an empty string is isGoogleAnalyticsAvailable() returns false. And since your class extends this one, it inherits this function (unless you rewrite it)

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