3v4l.org

run code in 500+ PHP versions simultaneously
<?php class C { public $untyped; public string $typed; } $c = new C; var_dump( isset( $c->untyped ) ); // false var_dump( isset( $c->typed ) ); // false var_dump( $c->untyped ); // NULL //var_dump( $c->typed ); // Fatal error: Typed property C::$typed must not be accessed before initialization
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
bool(false) bool(false) NULL
preferences:
41.07 ms | 1127 KiB | 4 Q