How set rule in .htaccess when argument=argument?

For example:

RewriteCond %{QUERY_STRING} (?)argument=argument

but:

RewriteCond %{QUERY_STRING} (?)argumentext=argumentext

I find rule:

RewriteCond %{QUERY_STRING} (?)[a-zA-Z0-9_]=[a-zA-Z0-9_]

But this rule find only "=" and random text before and after, but i need when argument=value

Example:

IP - - [DATE] "GET /?value=value HTTP/1.1" 
IP - - [DATE] "GET /?random=random HTTP/1.1" 
IP - - [DATE] "GET /?qwerty=qwerty HTTP/1.1" 
IP - - [DATE] "GET /?randomvalues=randomvalues HTTP/1.1" 

Need a rule when they are equal

>Solution :

You can use this rule with a capture group and a back-reference:

RewriteCond %{QUERY_STRING} ^([^=]+)=\1$
RewriteRule ^ - [G]

Here RewriteRule ^ - [G] is used for testing only.

Explanation:

• ^: Match start
• ([^=]+): Match 1+ of any character that is not = in capture group #1
• =: Match a =
• \1: Match same value as in capture group #1
• $: End