Online PHP editor | refs for alOaI

<?php class Demo { public static $foo = 42; protected static $boo = 43; public static function getProtected($name) { return self::$$name; } } $var1 = 'foo'; $var2 = 'boo'; $class = 'Demo'; $func = 'getProtected'; var_dump(Demo::$$var1); var_dump($class::$foo); var_dump($class::$$var1); //var_dump(Demo::$$var2); // Fatal error: Cannot access protected property Demo::$boo var_dump(Demo::getProtected($var2)); var_dump($class::getProtected($var2)); var_dump($class::$func($var2));