In php, the echo and var_damp strings produced by re-splicing are different? [Wrong post just now]-php Tutorial

In php, the echo and var_damp strings produced by re-splicing are different? [An error occurred in the post just now] as shown in, the above is the echo, and the following is the var_damp.
Why? Help

Reply to discussion (solution)

View the source code of the web page and you will find the same

View the source code of the web page and you will find the same

Well, that's true. thank you.

Can the xml format directly echo ......

What's different? Why didn't I see it?

The browser helps you filter tags. you are not very grateful for it...

Can the xml format directly echo ......

What should I do?
I need to use these labels

What's different? Why didn't I see it?

Label.

The browser helps you filter tags. you are not very grateful for it...

Is this related to browsers?

I need to use these tags. I'm not grateful for filtering them out!

The html tag is enclosed by <>, so your <...> browser will be interpreted as an html tag.
What does this have to do with data transmission? Do not disturb yourself

The browser helps you filter tags. you are not very grateful for it...

Is this related to browsers?

I need to use these tags. I'm not grateful for filtering them out!

The string of your echo is tagged, but it is filtered out when displayed in the browser, so you can directly use it in the php script.

Echo htmlspecialchars ($ string );

Problems caused by lack of basic web knowledge,
First, learn the basic html knowledge.