Php html tag printing solution

Php prints html tags. I post a piece of html code on the front end to the background. I want to print it in the background, but why is it like this? Front-end: & lt; div & nbsp; id = "" & nbsp; class = "" & gt; back-end printing: & lt; div & nbsp; id = \ "\" & nbsp; class = php prints html tags
I post a piece of html code on the front end to the background. I want to print it in the background, but why is it like this?
Front end:
Backend printing:

How to remove \?
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------ Solution --------------------
Stripslashes ()
------ Solution --------------------
Open magic_quotes_gpc. if you close it, you need to manually escape it.