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<?php class Enum { private static $cache = []; public static function __callStatic($name, $params) { $className = get_called_class(); if(!isset(self::$cache[$name])) { self::$cache[$name] = new $className($className::$$name); } return self::$cache[$name]; } } class Operator { private const EQUALS = ['=']; private $symbol; private function __const(string $symbol) { $this->symbol = $symbol; } } var_dump(Enum::EQUALS());
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Access to undeclared static property Enum::$EQUALS in /in/KKkL6:10 Stack trace: #0 /in/KKkL6(24): Enum::__callStatic('EQUALS', Array) #1 {main} thrown in /in/KKkL6 on line 10
Process exited with code 255.

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