Online PHP editor | refs for kpSpq

<?php function mockInputRead() { static $commands = [ 'open foo', 'close bar', 'dance with the devil in the pale moonlight', 'exit', ]; return array_shift($commands); } function vprintfln($format, array $args = []) { vprintf($format . PHP_EOL, $args); } $handlers = [ 'open' => function ($target) { vprintfln('Opening "%s"', [$target]); return 0; }, 'close' => function ($target) { vprintfln('Closing "%s"', [$target]); return 0; }, 'exit' => function () { vprintfln('Exiting...'); return 1; }, ]; $invalidHandler = function ($command) { vprintfln('## Invalid command "%s"', [$command]); }; while (true) { list($command, $argument) = explode(' ', mockInputRead(), 2) + [null, null]; if (!empty($command)) { if (isset($handlers[$command])) { if ($handlers[$command]($argument) > 0) { break; } } else { $invalidHandler($command); } } } vprintfln('Bye!');