关于 namespace 和 use的报错,该怎么处理

关于 namespace 和 use的报错

PHP code

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<?php #test.class.php
namespace myNamespace;
 
class MyClass {
    public function Show(){
        echo "hello";
    }
}
 
?>

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PHP code

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<?php #index.php
    require_once "test.class.php";
    $c1 = new myNamespace::MyClass();
    $c1->Show();
?>

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