Parseerror:syntaxerror,unexpected'"class_Rect.php"'解决思路

Parse error: syntax error, unexpected '"class_Rect.php"'

	
		
		
	

	
		
				//自动加载
		requireonce"class_Rect.php";
		requireonce"class_Triangle.php";
		requireonce"class_Circle.php";

			function __autoload($className){
				include("class_".ucfirst($className).".php");
			}
		?>
		
			
图形的周长和面积计算器

			

			矩形||
			三角形||
			圆形

		

					switch($_REQUEST["action"]) {
				case '1':
					$form=new Form("矩形",$_REQUEST,"test.php");
					echo $form;
					break;

				case '2':
					$form=new Form("三角形",$_REQUEST,"test.php","post","_blank");
					echo $form;
					break;

				case '3':
					$form=new Form("圆形",$_REQUEST,"test.php");
					echo $form;
					break;

				default:
				echo "请选择一个形状
";
				
			}

			if (isset($_REQUEST["act"])) {
				switch ($_REQUEST["act"]) {
					case '1':
						$shape=new Rect($_REQUEST);
						break;

					case '2':
						$shape=new Triangle($_REQUEST);
						break;

					case '3':
						$shape=new Circle($_REQUEST);
						break;
										
				}

				echo "面积为：".$shape->area()."
";
				echo "周长为：".$shape->perimeter()."
";
			}
		?>

	

------解决思路----------------------

引用:

	
		
		
	

	
		
				//自动加载
		require_once "class_Rect.php";
        require_once "class_Triangle.php";
        require_once "class_Circle.php";

			function __autoload($className){
				include("class_".ucfirst($className).".php");
			}
		?>
		
			
图形的周长和面积计算器

			

			矩形
------解决思路----------------------

			三角形
------解决思路----------------------

			圆形

		

					switch($_REQUEST["action"]) {
				case '1':
					$form=new Form("矩形",$_REQUEST,"test.php");
					echo $form;
					break;

				case '2':
					$form=new Form("三角形",$_REQUEST,"test.php","post","_blank");
					echo $form;
					break;

				case '3':
					$form=new Form("圆形",$_REQUEST,"test.php");
					echo $form;
					break;

				default:
				echo "请选择一个形状
";
				
			}
			

			if (isset($_REQUEST["act"])) {
				switch ($_REQUEST["act"]) {
					case '1':
						$shape=new Rect($_REQUEST);
						break;

					case '2':
						$shape=new Triangle($_REQUEST);
						break;

					case '3':
						$shape=new Circle($_REQUEST);
						break;
										
				}

				echo "面积为：".$shape->area()."
";
				echo "周长为：".$shape->perimeter()."
";
			}
		?>

	

这里的报错是显示$_REQUEST["action"]不存在，没有这个索引

你需要判断是否为空

$action = isset($_REQUEST["action"]) ? $_REQUEST["action"] : '';
switch($action)
{
//。。。。。。。。
}