PHP：带有新self（）的方法链？

I have an object created within a method, and I would like to further process it in another method of the same class.

I tried it like this, but $obj is not passed through to method two():

class SomeClass {
    public static function one($id)
    {
        $obj = new self();
        $obj->id = $id;
        //...
        return $obj;
    }

    public function two()
    {
        $obj->id = 2;
        return $obj;
    }
}

$obj = SomeClass::one($id)->two();

Is there a way to achieve this?

I found this thread How to chain method on a newly created object?, but it's still not quite clear whether this is possible or not.

If I'm not misunderstanding what you're trying to do, if you don't make the second method static, you can return an object and it'll be passed in as $this in the chained call;

class SomeClass {

    public $id = 0;

    public static function one($id)
    {
        $obj = new self();  // Create and return new object
        $obj->id = $id;
        return $obj;
    }

    public function two()
    {
        $this->id = 3;      // The new object is $this here
        return $this;
    }
}

$obj = SomeClass::one(5)->two();

two is a static method. You're trying to invoke it on an instance, and static methods by definition don't work on a specific instance.

Make the method not static, and manipulate $this instead of $obj.

Method chaining only makes sense when you are using setters. In combination with PHPDoc most IDE's (like NetBeans) will support code completion/autocomplete feature again.

p.s note that method chaining can give your more chance on errors like PHP Fatal error: Call to a member function .... on a non-object in .... when mixing in more classes with returning

class Example {

    protected $var = null;


    public function __construct() {

    }

    public function __destruct() {
        unset($this->var); // explicit memory clearing 
    }

    /**
     * @return \Example
     */
    public static function create() {
        return new self();
    }

    /**
     * @return \Example
     */    
    public static function getInstance() {
        return self::create();
    }

    /**
     * @return \Example
     */    
    public static function newInstance() {
        return self::create();
    }


    /**
     * 
     * @param mixed $var
     * @return \Example
     */
    public function setThing1($var) {
        $this->var = $var;
        return $this;
    }

    /**
     * 
     * @param mixed $var
     * @return \Example
     */
    public function setThing2($var) {
        $this->var = $var;
        return $this;
    }    
}

Example::create()->setThing1(1)->setThing2('2');