Question

I’m to make a (sort of) factory class that accepts a variable number of arguments and passes them on to the class that it will be invoking

<?php

class A {
    private $a;
    private $b;
    private $c;
    public function __construct($a=1, $b=2, $c=3){
        $this->a = $a;
        $this->b = $b;
        $this->c = $c;
    }
}

class B {
    private $foo;

    public function __construct(){
        $args = func_get_args();
        $this->foo = call_user_func_array(array('A', '__construct'), $args);
    }

    public function getObject(){
        return $this->foo;
    }
}

$b = new B(10, 20, 30);  
var_dump($b->getObject()); // should return equivalent of new A(10,20,30);

I’m getting this error

PHP Warning:  call_user_func_array() expects parameter 1 to be a valid callback, non-static method A::__construct() cannot be called statically

Answer 1

Found this answer reading about ReflectionClass. This seems to work best

<?php
class Factory {
    # ...
    public function __construct(){
        $args = func_get_args();
        $a = new ReflectionClass('A');
        $this->foo = $a->newInstanceArgs($args);
    }
    # ...
}