dependency injection in php/codeigniter

dependency_inject.php

<?php
class BASE_Model extends CI_Model 
{
    /**
     * inject_class - load class using dependency injection
     *
     * @access public
     * @param  string $path
     * @param  string $class
     * @param  string $func
     * @param  string $method
     **/
    public function inject_class($path, $class, $func, $method)
    {
        // load_class is a function located in system/core/common.php on line 123
        $obj = load_class($class, $path, NULL);
        return $obj->$func();
    }
}

// lets say this is instantiated by a user controller when a new user is made
class User_model extends BASE_Model
{
    public function create()
    {
        echo 'create a new user';
        $request = $this->inject_class('path/to/models', 'Logger_model', 'log');
        echo $request;
    }
}

class Logger_model extends BASE_Model
{
    public function log()
    {
        return 'Logged';
    }
}

this would be better defined as object collaboration/delegation and not dependency injection. DI would have the controller passing an instance of a Model to a Model