如何在php

Question

我希望我的变量可以被php中的类中的所有函数访问。 我正在提供我想要实现的示例代码。请帮帮我。

class ClassName extends AnotherClass {

    function __construct(argument)
    {

    }

    $name = $this->getName();
    $city = $this->getCity();
    $age = 24;


    public function getName() {
        return 'foo';
    }

    public function getCity() {
        return 'kolkata';
    }

    public function fun1() {
        echo $name;
        echo $city;
        echo $age;
    }

    public function fun2() {
        echo $name;
        echo $city;
        echo $age;
    }

    public function fun3() {
        echo $name;
        echo $city;
        echo $age;
    }
}

或者，如果有任何其他方式可以减少开销。请建议

Answer 1

你可以像这样实现目标：

class ClassName extends AnotherClass {

    private $name;
    private $city;
    private $age;

    function __construct(argument)
    {
        $this->name = $this->getName();
        $this->city = $this->getCity();
        $this->age = 24;
    }

    public function getName(){
        return 'foo';
    }
    public function getCity(){
        return 'kolkata';
    }

    public function fun1(){
        echo $this->name; 
        echo $this->city;
        echo $this->age;
    }
    public function fun2(){
        echo $this->name;
        echo $this->city;
        echo $this->age;
    }
    public function fun3(){
        echo $this->name;
        echo $this->city;
        echo $this->age;
    }
}

Answer 2

class ClassName extends AnotherClass
{
    protected $name;
    protected $city;
    protected $age = 24;

    public function __construct()
    {
        $this->name = $this->getName();
        $this->city = $this->getCity();
    }

    ...

    public function fun1()
    {
        echo $this->name;
        echo $this->city;
        echo $this->age;
    }
    ...
}

那会让你有所收获。

Answer 3

您必须将变量设置为类属性：

class ClassName extends AnotherClass {
    private $name;
    private $city;
    private $age;

    //Here we do our setters and getters
    public function setName($name)
    {$this->name = $name;}
    public function getName()
    {return $this->name;}

   // you call the setters in your construct, and you set the values there

当然，您可以将它们设置为私有，公共或受保护，取决于您是否希望只能从此类或其他人访问它们。