Clear or reset the wordpress posts pagination while changing filters -

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i think simple, don't it. filter: 

<form class='post-filters'>     <select name="filter">         <?php         $filter_options = array(             'houses' => 'houses',             'hotels' => 'hotels',         );         foreach( $filter_options $value => $label ) {             echo "<option ".selected( $_get['filter'], $value )." value='$value'>$label</option>";         }         ?>     </select>     <input type='submit' value='filter!'> </form>

related php apply filter wordpress query:

<?php      global $destinations;     $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;     $destinations = new wp_query([         'paged' => $paged,         'location' => $location,         'category_name' => urldecode(get_query_var('filter')),         'posts_per_page' => 6     ]);  ?>

if select "filter" , result has more 6 entries, use next_posts_link() see next 6 results. problem now, if i'm on page 2 or 3 , other filter has less e.g. 6 entries, see no results while changing filter.

how clear variable (/page/2/) while changing filter?

example:

category/subcategory/subsubcategory/page/3/?filter=houses

now select "filter" hotels 

category/subcategory/subsubcategory/page/3/?filter=hotels

and "/page/3" not cleared. can not see posts.


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