That looks like an explaination of pointers. It strongly suggests that you can do arithmetic on references, to get to the "next" memory location. I like this image: 
           +--------+       
Alias:     | $alias | ------------+
           +--------+             |                          
                                  |
                                 \|/
           +--------+       +----------+       +---------+
Variable:  |  $var  | ----> | Variable | ----> | Content |
           +--------+       +----------+       +---------+
                                 /|\                   
                                  +--------+          
           +--------+       +----------+   |          
Reference: |  $ref  | ----> | Variable | --+          
           +--------+       +----------+

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But that might be too much internals for some.

In reply to Re: The Concept of References by Anonymous Monk
in thread The Concept of References by leriksen

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