Some useful questions for a PHP interview

PHP_Interview.md

PHP interview

• Are you familiar with the tools we're given in PHP 5.4 to write Object Oriented code?
  We can manipulate scope, have interfaces, abstract classes, traits, namespaces…

• What's the difference between Public, Protected and Private?
  Public ensures a class method/variable is available everywhere, from any instance of the class. Protected makes the method/variable only available to the class itself and extending classes. Private makes the method/var only accessible to the class itself.

• Do you know any of these acronyms?

  • DRY "Don't Repeat Yourself"
  • MVC "Model - View - Controller"
  • SOLID "Single responsibility, Open-closed, Liskov substitution, Interface segregation and Dependency inversion"

• Do you know Composer, do you use it?
  Composer is a package manager and dependency manager for PHP.

  • Follow up: Would you want to use it, why or why not?

• Have you heard about the PHP-FIG?
  PHP Framework Interop Group. Group of developers that strives to create standards in PHP. Style standards but also standardized practices for autoloading etc…

• Have you heard about OWASP and their Top 10 list?

• A certain page is loading extremely slow. How do you debug and trace the bottleneck?
  You could use a tool like XHProf to profile your page and scan for bottlenecks. New Relic is a handy tool for profiling online applications.