Pagination a filter result

this “query” doesn′t go through the Loop.

Where did you read that?

thanx for the reply, i read it yesterday, as soon as i ceck the historical i post the url.
But in the other hand if filtering goes through the Loop, why all the post addecuate to the filter conditions are swhowed in the first “main” screen instead of having them paged, as the behaviour of the Search filter, that means, when i am trying to check if a word is contained in the posts, results are paged.???
Any idea would be more than welcome.

i read it yesterday

Where? Are you talking about custom queries?

not sure, i modified a plugin which launch a query filtering the post with somo categories. The result of the main function es a php variable called $reult which contains all the posts which follows the fillter, but all together as i said, no page nothing.

That sounds like a custom query.
https://codex.www.ads-software.com/Function_Reference/query_posts
https://codex.www.ads-software.com/Function_Reference/get_posts
https://codex.www.ads-software.com/Function_Reference/WP_Query

thanx for the reply esmi,
i’ve already read this post, especially the query_posts, but i am sure i am doing something wrong because after adding the filter in the plugin php and executing the function, the array of posts …. i am trying right now to implement the loop into the function in the plugin (sounds crazy isn`t it?) but not even working…

What’s the query?

I perform in a function called smart_query teh SELECT * FROM database WHERE and i start mixing a lot of AND & OR in categories to get the results. Everything is storages in a php variable $query.
I return this variable and the problem appears, pagination and not even the amount of results are showed.
I tryed some solutions but they are not goot, for example using the LIMIT in the query but it is not ideal isnt it?
Moreover if you are interested in the php code let me know.

Why are you creating your own MySQL query instead of using https://codex.www.ads-software.com/Function_Reference/query_posts or https://codex.www.ads-software.com/Function_Reference/WP_Query

cuz i do not know if query_post can handel this example of query:
Defined Categories:
1. Size
1A small
1B medium
1C big
1c1 super big
1c2 extra big
2 color
2A black
2B White
…
now the user would like to check the super big or extra big and white,… here is where i face the problen with WP_query to hand AND and OR so deep level.
Moreover i added two datepicker so the user and the filter BETWEEN two dates. DOes qeury_post support it?
so that is the reason cuz i am not able to use the WP_qeury or query_post. ANy idea?

Are these WordPress categories or custom fields? Or something else entirely?

except the dates, all are categories and subcategories

Then you can use query_posts or WP_Query.

what about the date filter (BETWEEN) it is no t a category but a field in the post in DB
Besides how could be for example this array o categories implemented?
Category Places:
subdategory barcelona
subcategory madrid
subcategory roma
subcategory milan
Categoy Cars
subcategory Volkswagen (and two descendants in vw)
sub_subcategory polo
sub_subcategory coupe
sub_subcategory beetle
subcategory Audi
sub_subcategory tt
sub_subcategory x7
subcategory BWM

an example of query could be the user would like to read all posts of a cars in a cities, for example;
SELECT …. categories = ( (polo or coupe) AND Audi[all modles]) AND (Barcelona Or Madrid) BETWEEN 01/07/2010 AND 01/07/2011

Any suggestion? thanks in advance =)