How PHP Gets the return display text for textarea in MySQL

Is that I have a
Text content
Then I pressed the return key in the textarea to change the line. Then write to the database.
Then use PHP to get the data. How does PHP recognize my return key in textarea?
(I don't want to textarea praying holding hands to enter the logo)
It's like posting a post. Automatically identifies my enter key;
Seek the Great God;

Reply to discussion (solution)

The NL2BR () function inserts an HTML newline character before each new line (\ n) in the string (
)。

The editor can handle line breaks ...

The editor can handle line breaks ...

The NL2BR () function inserts an HTML newline character before each new line (\ n) in the string (
)。
Moderator, can you take my downstairs reply string to save only a newline?

