htacces checking each server url word if its match =' tick then
it wil redirect.
you can add block ip ,show 404 error .
what ever u want to do
very useful if dealing with huge sql records website
PHP Code:
RewriteEngine on
RewriteCond %{QUERY_STRING} [+,*/']
RewriteRule . - [F]
RewriteCond %{QUERY_STRING} \%27
RewriteRule . - [F]
RewriteCond %{QUERY_STRING} \%5C
RewriteRule . - [F]
you can add custom string also
Eg:
RewriteCond %{QUERY_STRING} \order
RewriteRule . - [F]