我如何使变量可访问php类中的所有函数

Question

I want my variables to be accessible to all the functions within the class in php. I am giving a sample code of what Im trying to achieve. Please help me out.

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;
    }
}

Or if there is any other way to have least overhead .Please suggest

Answer 1

You can acheave you goal like this :

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;
    }
    ...
}

That would get you going a bit.

Answer 3

You have to set your variables as class attributes:

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

Of course you can set them as private, public or protected, depends if you want them to be accessible only from this class or others.