PHP 7 interview question
Explain `array_map`, `array_filter` and `array_reduce` with examples.
The answer is available to members. Create a free account to see every answer, track which questions you're confident about and practise with timed mock interviews.
More most-asked PHP 7 questions
- What are typed properties in PHP 7.4?
- How do return type declarations work in PHP 7?
- What were the headline improvements of PHP 7.0 over PHP 5.6?
- Explain scalar type declarations and coercive vs strict mode in PHP 7.
- Explain the `Throwable`, `Error` and `Exception` hierarchy introduced in PHP 7.
- What are nullable types in PHP 7.1?
- What does the null coalescing operator `??` do, and how is it different from `isset()` with a ternary?
- What are arrow functions in PHP 7.4 and how do they differ from closures?