我在基类中调用父函数但没有返回任何内容

Question

class ajay{
    function test(){
        return "sandeep";
    }
}

class Sandeep extends ajay{
    function testing(){
        parent::test();
    }
}
$objct = new Sandeep();echo $objct->testing();

Answer 1

There is no return data in testing function

<?php 
class ajay{
    function test(){
        return "sandeep";
    }
}

class Sandeep extends ajay{
    function testing(){
        $data = parent::test();
        return $data;
    }
}
$objct = new Sandeep();
echo $objct->testing();
?>

Answer 2

您在return方法中忘记了testing()：

class ajay {
    function test(){
        return "sandeep";
    }
}

class Sandeep extends ajay{
    function testing(){
        return parent::test();
    }
}