How to add Checkbox field in Form: Open app/code/local/Namespace/CustomModuleName/Block/Adminhtml/ CustomModuleName /Edit/Tab/Form.php and add the below code. How to re-populate the checkbox on Edit page: Just add the extra line in ablove code like below:
First Method Second Method
Extention Link: https://drive.google.com/open?id=0Bx1BoQLDAyPNZzJOcWt4UHlCWEE Some Modification I have made in this extention: 1- Like If you want to change the admin tab Name Go to: Inchoo_CustomLinkedProducts-master/app/code/community/Inchoo/CustomLinkedProducts/Block/Adminhtml/Catalog/Product/Edit/Tab.php 2- Or if you want that only one product should be selected. Go to: Inchoo_CustomLinkedProducts-master/app/code/community/Inchoo/CustomLinkedProducts/Model/Observer.php
\app\code\core\Mage\Payment\Model\Method\Cc.php Line Number : 143
The Defination is found in the class where it is defined: app/code/core/Mage/Core/Block/Abstract.php In Line No 1144 : function htmlEscape() deprecated or you can say renamed after 1.4.0.0-rc1 with escapeHtml() function