How does php work?
What is PEAR?
Is empty check in php?
If anybody integrate "First Data Global Payment Gateway" in your site?
Explain Magento's autoload functionality and how to instantiate classes? What is the process you take when theming a store? Talk about Magento collections and how you use them?
What is difference between array_merge and array_combine in php?
When to use single quotes, double quotes, and backticks?
How should a model be structured in mvc?
What is trait in php?
What is cookie and why do we use it?
What are escaping characters?
Why these language is needed?
Where is php code written?