How to limit an expression to 7 characters in mod_rewire?

Question

Apache HTTP Server

Rule!

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !^.+\/&
RewriteRule ^([^/]*{7})$ /go\?id\=$1 [L]

As a result, it gives an error! And {0,7} too! I don’t know what to do, what are other regular expressions in general

Answer 1

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^/]{0,7})$ /go?id=$1 [L]

Answer 2

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(+{1,7})$ /go\?id\=$1 [L]

Character 1 from one to 7 times
And who will escape special characters for you?