How to remove empty parameter or parameters anywhere in URL by .htaccess?

Question

Empty parameters that I mean can be anywhere in URL each time different place, each time with different name, each time on different php page e.g :

http://www.example.com/AnyPHPpageHere.php?parameter1=7&parameter2=&parameter3=blue&parameter4=

to the form:

 http://www.example.com/AnyPHPpageHere.php?parameter1=7&parameter3=blue

So how to do it via .htaccess?

Answer 1

You can use this URL to remove any one or more empty parameters from anywhere in URLs:

RewriteEngine On

RewriteCond %{QUERY_STRING} ^(.+?&)?[^=]+=(?:&(.*))?$
RewriteRule ^ %{REQUEST_URI}?%1%2 [R=302,L,NE]