moradwan

Update

I found a bug in the code which caused the letters after ? not to be matched.
After some researches, I found that there are two ranges of characters… From ? to ? and from ? to ?.

https://www.unicodemap.org/range/12/Arabic/

So I added both ranges and adjusted the code to be as below:

add_rewrite_rule(
    		'(mycategory/)([?-?a-z?-?]+)/?$','index.php?category_name=$matches[1]&letter=$matches[2]','top'
);

Note that I added a-z in the middle just to split the letters, however, the following code is also working properly.

add_rewrite_rule(
    		'(mycategory/)([?-??-?]+)/?$','index.php?category_name=$matches[1]&letter=$matches[2]','top'
);

Resolved using the following:

add_rewrite_rule(
		'(stars-a-z/)([?-?]+)/?$','index.php?category_name=$matches[1]&letter=$matches[2]','top'
	);