Question

php类的简单的继承问题

<?php
class student
{
private $name;
function __construct($name)
{
$this->name=$name;
}
public function getName()
{
return $this->name;
}
}
class man extends student
{
private $sex;
function __construct($name,$sex)
{
parent::__construct($name);
$this->$sex=$sex;
}
public function getName()
{
echo parent::getName();
echo $this->sex;
}
}
$s = new man("xiaoming",'woman');
$s->getName();

为什么最后不能输出xiaoming 和 woman 只能输出xiaoming

Answer 1

换下位置就可以了

class man extends student
{
    private $sex;
    function __construct($name,$sex)
    {
        $this->sex=$sex;
        parent::__construct($name);
    }
    public function getName()
    {
        echo parent::getName();
        echo $this->sex;
    }
}

$s = new man("xiaoming",'woman');

$s->getName();