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<?php class CFG { private static $data = []; public static function set($key, $value) { self::$data[$key] = $value; } public static function get($key) { if (isset(self::$data[$key])) { return self::$data[$key]; } throw new Exception('Key not set'); } } CFG::set('foo', 'bar'); echo CFG::get('baz');
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Exception: Key not set in /in/8mU7m:18 Stack trace: #0 /in/8mU7m(23): CFG::get('baz') #1 {main} thrown in /in/8mU7m on line 18
Process exited with code 255.

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