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<?php interface UserProviderInterface { public function supportsClass($class); } final class UserProvider implements UserProviderInterface { public function supportsClass($class): bool { return $class === $this->class || is_subclass_of($class, $this->class); } } echo (new UserProvider())->supportsClass('');
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined property: UserProvider::$class in /in/vVasO on line 12 Warning: Undefined property: UserProvider::$class in /in/vVasO on line 12 Deprecated: is_subclass_of(): Passing null to parameter #2 ($class) of type string is deprecated in /in/vVasO on line 12

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