Most Frequently Asked PHP Interview Questions

When you decide about making your career in PHP development you must go through the following Most Frequently Asked PHP Interview Questions.

Simple PHP Interview Questions

What is the latest version of PHP?
How will you display text on a web page using PHP? Discuss three different ways.
When will you use the switch case statement instead of if..else? Describe how does the switch case statement work?
What are the different operators available in PHP?
When we use === operator? What is the difference between == and ===?
How would you implement call by value and call by reference mechanism in PHP? Illustrate with an example.
When do we use the GET or POST method in processing a form? Discuss the difference between GET, POST, and REQUEST variables?
What are super global variables in PHP?
Besides the print_r() function, what are other ways to display an array in PHP? Give an example.
When should you use try-catch block?

Advanced PHP Interview Questions

When will you prefer PDO over mysqli?
Discuss any two mechanisms of sending mail in PHP.
When do we use query() method of mysqli?
What is the purpose of mysqli_connect()?
For the purpose of running a prepared statement of SQL, which functions of mysqli should be used?
Similarly, which functions of PDO do we need to run a prepared statement?
Differentiate between MongoDB and MySQL.
What is the purpose of the bind_param() function?
When do we use SQLite database?
What are the advantages of SQLite?