PHP 7 and 8 Runtime Features

OPcache stores compiled opcodes across requests and usually matters more to web workloads than JIT. JIT compiles eligible code to machine code but does not accelerate network/database waiting.

Practical example

<?php
#[Attribute(Attribute::TARGET_METHOD)]
final class Route { public function __construct(public string $path) {} }
enum Status: string { case Draft = 'draft'; case Published = 'published'; }

Attributes provide native metadata; enums model closed case sets; match and readonly features strengthen domain code. Benchmark JIT on representative CPU-heavy workloads. Declare a minimum PHP version, monitor deprecations, and upgrade dependencies before runtime transitions.