Step by step learning PHP index stickers (1)

Recently, I have been studying PHP with great pains and cannot find any suitable tutorials on the market.

The general tutorials start from scratch, so it is not suitable for people who already have some programming experience, because it looks slow.

So here I want to write a tutorial that will allow people with programming experience to learn PHP at least.

If you have any better suggestions, I hope you can make them. Thank you.

1. Step by step learning PHP (1) -- to do things well, you must first sharpen the tool.

2. Step by step learning PHP (2) -- PHP type

3. Step by step learning PHP (3) -- Functions

4. Step by step learning PHP (4) -- Functions

5. Step by step learning PHP (5) -- classes and objects

6. Step by step learning PHP (6)-object-oriented

7. Step by step learning PHP (7) -- string

Not complete .......