8.4 - Asymmetric Visibility

[genintho]

RFC - https://wiki.php.net/rfc/asymmetric-visibility-v2

• classic

class Foo
{
    public private(set) string $bar = 'baz';
}

• property promotion

class Foo
{
    public function __construct(
        public private(set) string $bar,
    ) {}
}

• abbreviated form

public private(set) string $foo;
private(set) string $foo;
 
public protected(set) string $foo;
protected(set) string $foo;

• relation with readonly

// These create a public-read, protected-write, write-once property.
public protected(set) readonly string $foo;
public readonly string $foo;
readonly string $foo;
 
// These creates a public-read, private-set, write-once, final property.
public private(set) readonly string $foo;
private(set) readonly string $foo;
 
// These create a public-read, public-write, write-once property.
// While use cases for this configuration are likely few, 
// there's no intrinsic reason it should be forbidden.
public public(set) readonly string $foo;
public(set) readonly string $foo;
 
// These create a private-read, private-write, write-once, final property.
private private(set) readonly string $foo;
private readonly string $foo;
 
// These create a protected-read, protected-write, write-once property.
protected protected(set) readonly string $foo;
protected readonly string $foo;