Please checkout http://www.clickitaudio.com I think this is a great feature for your web and blog. Kistening is much easier than reading and less costly than video.
As you know I have started teaching myself PHP programming. I hove programmed before in different language. I hope I am not just too old to learn. You cannot teach an old dog new tricks.
This is use to add 1 or delete 1 from the valuable when the line is processed. This is what we use to set the number of loops.
To understand bit operations, I need to understand binary. In this example 7 in binary is 00000111, 8 is 00001000. Do I ever used those bit operations? I don't know. But I know PHP can handle bit operations. It is good to know.
Some of the operations are easier to understood when you write them and execute them. The logical Operations are just that. Logical Operations are "AND" "OR" "XOR" and "NOT"