_call php method

<?php
class storage
{
    protected $data;
    
    public function __construct($data)
    {
        $this->data = $data;
    }
    
    public function __call($method, $arguments)
    {
        if(true === array_key_exists($method, $this->data))
        {
            if(is_array($this->data[$method]) && count($arguments) > 0)
            {
                if(true === array_key_exists($arguments[0], $this->data[$method]))
                {
                    return new self($this->data[$method][$arguments[0]]);
                }
            }
            return $this->data[$method];
        }
    }
}

$data = array(
    'users'    =>    array(
        1    =>    array(
            'name'    =>    'sample',
            'age'    =>    21
        ),
        5    =>    array(
            'name'    =>    'sample',
            'age'    =>    25,
            'books'    =>    array(
                1    =>    array(
                    'title'    =>    'Moby Dick'
                )
            )
        )
    )
);

$storage = new storage($data);
echo $storage->users(1)->age(); #21
echo $storage->users(5)->age();    #25
echo $storage->users(5)->books(1)->title(); #Moby Dick
?>