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<?php class Foo { private static DateTimeImmutable $bar; private static ?string $foo; public static function getBar(): DateTimeImmutable { return self::$bar ??= new DateTimeImmutable(); } public static function getFoo(): ?string { return self::$foo ??= null; } public static function setFoo(string $foo): void { self::$foo = $foo; } } var_dump(Foo::getBar()); var_dump(Foo::getBar()); var_dump(Foo::getFoo()); Foo::setFoo('test'); var_dump(Foo::getFoo());
Output for git.master
object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2019-12-02 18:26:16.003768" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2019-12-02 18:26:16.003768" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } NULL string(4) "test"
Output for git.master_jit
object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2019-12-02 18:26:16.003835" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2019-12-02 18:26:16.003835" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } NULL string(4) "test"
Output for rfc.property-hooks
object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2019-12-02 18:26:16.003578" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2019-12-02 18:26:16.003578" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } NULL string(4) "test"

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