Online PHP editor | refs for rl9GO

<?php if (!defined('PHP_VERSION_ID')) { $version = explode('.', PHP_VERSION); $version_id = $version[0] * 10000 + $version[1] * 100 + $version[2]; define('PHP_VERSION_ID', $version_id); } if (PHP_VERSION_ID < 50300) { $message = 'PHP version ' . PHP_VERSION . ' is not supported.'; if (class_exists('RuntimeException')) { throw new RuntimeException($message); } else { trigger_error($message, E_USER_ERROR); } }