Dependency injection in php? - php

Question

I am currently building a little project with PHP whilst not using any static methods or global state.
My class' constructors currently look a little like this, I am just injecting the dependent objects upon creating an object instance.
class Something {
public function __construct(Name\Space\Object $object, Other\Name\Space $object2)
{
# Assign properties here
}
}
In one of my application's classes I need to create new instances of various objects through the calling of its methods. Something a little like below;
class Something {
public function getNewObject()
{
return new Name\Space\Object();
}
public function getNewObject2()
{
return new Name\Space\ObjectTwo();
}
}
Is this how it should be done whilst adhering to the standard rule of dependency injection?
I am unsure how else it could be done as if I inject the object into the constructor then I will only have one instance whereas I may need many within my application?
Thanks,

Answer 1

I believe that functions are first class objects in PHP, so this should work:
<?php
class MyClass {
function foo() {
return 'foo';
}
};
class MyOtherClass {
function __construct($klass) {
$this->klass = $klass;
}
function get_instance() {
return new $this->klass();
}
}
$factory = new MyOtherClass(MyClass);
$obj = $factory->get_instance();
?>
// <h1> value should equal foo
<h1><?php echo $obj->foo();?></h1>
Edit: Tested and works.