thinkphp $_get string + is filtered into spaces

UID value, string "+", $_get print out, is filtered into a space?

Reply content:

UID value, string "+", $_get print out, is filtered into a space?

And no filtering occurs, the normal URL parsing should be a space here.
For Base64 strings, because there is a +, if you want to pass through a URL,
Either make sure that the + number that appears in the URL is%20, that is, the replacement + number is%20,
Either use Urlsafe's Base64 code, and replace the +,/,/-, _

URL parsing is performed on UrlDecode
Echo urldecode (' + ')

