Magento Widget Development

Developing a Magento widget starts with widget.xml file in your modules etc directory.

    
    Widget Title
    Widget description

    1
    
        
            1
            1
            5
            Param Label
            text
        
         
        
            0
            1
            
            Select Derp-down
            select
            0
            
                
                    0
                    No
                
                
                    1
                    Yes
                
            
        
        
        
            Cache Lifetime (Seconds)
            86400 by default, if not set. To refresh instantly, Clear the Blocks HTML Output Cache.
            1
            text
        
    
    
    

Now you have to build a block class which extends Mage_Core_Block_Template
implements Mage_Widget_Block_Interface
Then just use method _toHtml() and _beforeToHtml() in that class to get set data in template

And that’s all you need.