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<?php class Foo { private ?int $id; private ?string $name; /** * @param null|int<1, 20> $id */ private function __construct(?int $id = null, ?string $name = null) { $this->id = $id; $this->name = $name; } final public static function withId(int $id) : self { if ($id < 1 || $id > 20) { throw new \Exception(); } $self = new self; $self->__construct($id); return $self; } } class Bar { private ?int $id; private ?string $name; /** * @param null|int<1, 20> $id */ private function __construct(?int $id = null, ?string $name = null) { $this->id = $id; $this->name = $name; } final public static function withId(int $id) : self { if ($id < 1 || $id > 20) { throw new \Exception(); } return new self($id); } } $foo = Foo::withId(1); var_dump($foo); $bar = Bar::withId(1); var_dump($bar);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.14, 8.4.16 - 8.4.18, 8.5.0 - 8.5.3
object(Foo)#1 (2) { ["id":"Foo":private]=> int(1) ["name":"Foo":private]=> NULL } object(Bar)#2 (2) { ["id":"Bar":private]=> int(1) ["name":"Bar":private]=> NULL }
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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