Here, I will show you how you can change the default page layout in Magento. By page layout, I mean all CMS page, category page, etc.
There are different ways to change the page layout in Magento. Here are some of them:-

Here, I will show you how you can get list of all modules in your Magento installation. It’s a simple code.
Get all modules

Here is a quick tip to change the Default welcome message that appears in header of Magento shop.
When the user is not logged in, the message appears as ‘Default welcome msg!‘.
To change the message text, follow steps below:-