PHP Chaining method example

calc.php

<?php

class Calc {

    protected $value;

    public static function create()
    {
        return new self;
    }

    public function add($value)
    {
        $this->value = $this->value + $value;

        return $this;
    }

    public function substract($value)
    {
        $this->value = $this->value - $value;

        return $this;
    }

    public function multiply($value)
    {
        $this->value = $this->value * $value;

        return $this;
    }

    public function divide($value)
    {
        $this->value = $this->value / $value;

        return $this;
    }

    public function get()
    {
        return $this->value;
    }
}

$result = Calc::create()->add(5)->substract(1)->multiply(4)->divide(2)->get();

var_dump($result); // 8

mas saat saya mau initiate property $value pada saat pemanggilan method create() bagaimana caranya?

Saya menggunakan

public static function create()
{
        $this->value = 100
        return new self;
}

di dalam method create() tidak bisa.

Hmm, pertama bisa langsung set di property protected $value = 100. Atau seperti ini

public static function create()
{
    $instance = new self;

    $instance->value = 100;

    return $instance;
}