PHP7新特性

	//设置时区
	date_default_timezone_set('Asia/Shanghai');
	echo '当前时间：'.date('Y-m-d H:i:s');

	echo "\n\n\n";
		
	$site = $_GET['site'] ?? '菜鸟php7';
	echo $site ;
	echo "\n\n\n";

	// 整型比较
	print( 1 <=> 1);
	echo "\n\n\n";
	print(PHP_EOL);
	
	echo "\n\n\n";
	//定义数组
	define('sites',array(
		'www.baidu.com',
		'www.google.com',
		'www.yetyun.com',
	));
	print_r(sites);
	echo "\n\n\n";
	
	//匿名类
		
	interface Logger{	
		public function log(string $msg);			
	}



	class Application{
		
		private $logger;
		
		public function getLogger():Logger{
			
			return $this->logger;	
		}	
		
		public function setLogger(Logger $logger){
			$this->logger = $logger;	
		}
		
	}
	
	
	
	$app = new Application();
	$app->setLogger(new Class implements Logger{
		public function log(string $msg){
			print($msg);	
		}	
		
	});
	$app->getLogger()->log('匿名类： 我的第一条日志');