How to determine whether the source code is encrypted-php Tutorial

How can I determine whether the source code is encrypted with a piece of source code? I suspect it is encrypted, but I don't know how to determine it.

Reply to discussion (solution)

Paste the code, if you think you are not sure

Visual testing ....

Isn't the encrypted code visible at once? it's a bunch of garbled characters ..

Can I find the key search methods?

You can paste it out or cut a graph.

What is the strength of such a guess?

You can see it at a glance.

There are too many codes. how can I post it? one post is more than 20 pages. are you not tired? is there a way to blindly look at it, if the source code is encrypted, do you blindly read it? you know, there must be a solution.

If it is encrypted, you only need to see the previous one.