<?php
class person{ public $name;
public $age;
public $qq; public $color; function __construct($name,$age,$color)
{
$this->name=$name;
$this->age=$age;
$this->color=$color;
}
} class student extends person
{ function __construct($name,$age,$color,$qq)
{
$this->name=$name;
$this->qq=$qq;
}
} $sd=new student('xuxin',22,'bld',562332); echo $td-name;
$p=new person('ligen',22,'red'); echo $p->name,'<br />',$p->age,'<br />',$p->color;
?>构造函数怎么不能覆盖?
class person{ public $name;
public $age;
public $qq; public $color; function __construct($name,$age,$color)
{
$this->name=$name;
$this->age=$age;
$this->color=$color;
}
} class student extends person
{ function __construct($name,$age,$color,$qq)
{
$this->name=$name;
$this->qq=$qq;
}
} $sd=new student('xuxin',22,'bld',562332); echo $td-name;
$p=new person('ligen',22,'red'); echo $p->name,'<br />',$p->age,'<br />',$p->color;
?>构造函数怎么不能覆盖?
class person{ public $name;
public $age;
public $qq; public $color; function __construct($name,$age,$color)
{
$this->name=$name;
$this->age=$age;
$this->color=$color;
}
} class student extends person
{ function __construct($name,$age,$color,$qq)
{
$this->name=$name;
$this->qq=$qq;
}
} $sd=new student('xuxin',22,'bld',562332); echo $td-name;
$p=new person('ligen',22,'red'); echo $p->name,'<br />',$p->age,'<br />',$p->color;
?>
需要显示的调用父类的构造方法parent::__construct();
$sd=new student('xuxin',22,'bld',562332);
echo $sd->name;------------------测试哥的签名--------------------------
哥默默的低下头,不是哥修养好,而是哥在找砖头!
--------------------------------------------------------
class MyClass
{
public $public = 'Public1';
protected $protectde = 'Protected1';
private $private = 'Private1';
function printHello()
{
echo $this->public."\n";
echo $this->protected."\n";
echo $this->private."\n";
}
}
class MyClass2 extends MyClass
{
protected $protected = 'Protected2';
function printHello()
{
echo $this->public."\n";
echo $this->protected."\n";
echo "--------\n";
echo parent::printHello()."\n";
}
}$obj2 = new MyClass2();
echo "<pre/>";$obj2->printHello();