PHP 8.1
Readonly properties
prop = $prop; // Initialized once in same scope
}
}
$test = new Test("foobar");
var_dump($test->prop);
$test->prop = "foobar"; // Error
]]>
Enums
Fibers
Full-stack interruptable functions
done(
fn(mixed $value) => $loop->futureTick(fn() => $fiber->resume($value)),
fn(Throwable $reason) => $loop->futureTick(fn() => $fiber->throw($reason))
);
return Fiber::suspend();
}
]]>
Change: Static Variable Inheritance
Inherited method shares parent's static vars
No Return type
final for class constants
new expressions can be used in initializers
logger = $logger ?? new NullLogger;
}
}
]]>
First-class callables
method(...)
$fn = Foo::method(...);
// instead of
$fn = Closure::fromCallable('strlen');
$fn = Closure::fromCallable([$this, 'method']);
$fn = Closure::fromCallable([Foo::class, 'method']);
]]>
Intersection types
countableIterator = $countableIterator;
}
public function getIterator(): Traversable&Countable {
return $this->countableIterator;
}
}
]]>
Inheritance cache (avoid relinking classes)
JIT improvements and add support for ARM64
Optimize class name resolution