我正在尝试通过调用父函数数据来学习php oop的简单方法。然而，我在某个地方犯了错误。
class name{
var $firstname;
var $lastname;
var $name;
public function name($firstname, $lastname){
$this->firstname=$firstname;
$this->lastname=$lastname;
$this->name=$this->firstname." ".$this->lastname;
return $this->name;
}
}
class sentence extends name{
var $name;
var $letter;
function sentence(){
$this->letter="My name is ";
echo $this->letter.$this->name;
}
}
$name=new name(ABC, Xyz);
$letter=new sentence();
我已经创建了一个调用来获取名称输入和另一个子类来编写句子。
一个快速修复，因为这可能是你想要的。
<?php
class name {
private $firstname;
private $lastname;
private $name;
private $sentence;
public function __construct($firstname, $lastname){
$this->firstname = $firstname;
$this->lastname = $lastname;
$this->name = $firstname . " " . $lastname;
$this->sentence = "My name is : " . $this->name;
}
public function getName(){
return $this->name;
}
public function getSentence(){
return $this->sentence;
}
}
$instance = new name("test","lastname");
echo $instance->getSentence();
?>
class name
{
public $firstname;
public $lastname;
public $name;
public function name($firstname, $lastname)
{
$this->firstname = $firstname;
$this->lastname = $lastname;
$this->name = $this->firstname.' '.$this->lastname;
return $this->name;
}
}
class sentence extends name
{
public $name;
public $letter;
public function greeting()
{
$this->letter = 'My name is ';
echo $this->letter.$this->name;
}
}
//$name=new name(ABC, Xyz);
$letter = new sentence('ABC', 'Xyz');
$letter->greeting();
感谢@ManhNguyen
您是否试图读取父类中变量的状态?
这不是OOP的工作方式。
你要么把所有的变量组合成一个类，要么把它作为参数传递给你想要访问数据的函数。
其次，您似乎没有使用__construct函数，但将变量传递给new name()函数，这也是一个禁忌。