What are PHP 8 features you use regularly?
Interviewer Expectations for this Question
01
Core Competency
Assesses fundamental understanding of PHP conventions, runtime behavior, and memory/performance considerations.
02
Evaluation Criteria
Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.
Comprehensive Model Answer
Verified Solution
- Named arguments: htmlspecialchars(string: $s, flags: ENT_QUOTES).
- Constructor property promotion and readonly properties.
- Match expression (strict comparison, returns a value).
- Nullsafe operator: $user?->address?->city.
- Union types, mixed and static return type.
- Attributes for metadata instead of docblock annotations.
- Enums with methods and backed values.
- Fibers for cooperative multitasking.
- Throw as an expression.
- JIT compiler for CPU-bound workloads.
enum Status: string {
case Active = 'active';
case Banned = 'banned';
public function label(): string { return ucfirst($this->value); }
}
Candidate Response Strategy & Interview Tips
- Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
- Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
- Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
- Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.