问题描述：

I\'ve got this code:

<?php wp_dropdown_categories(); ?>

And I\'ve got this code from Codex:

var dropdown = document.getElementById(\"cat\");
function onCatChange() {
if ( dropdown.options[dropdown.selectedIndex].value > 0 ) {
location.href = \"<?php echo esc_url( home_url( \'/\' ) ); ?>?cat=\"+dropdown.options[dropdown.selectedIndex].value;
}
}
dropdown.onchange = onCatChange;

First function takes all categories, and second function displays them on select. When I select one of the categories, then I\'m redirected to the URL of the chosen category.

My problem is, that loop doesn\'t show posts from chosen category. Searching for a solution, I came across something like this:

$query = new WP_Query( array( \'category_name\' => \'staff\' ) );

But it works only for things like \"XYZ Category page\". My page allows creating new categories by end user, so I need something more dynamically.

Maybe something like this?

$cat = get_the_category();
$query = new WP_Query( array( \'category_name\' => $cat ) );

and then use it in loop?

EDIT: This is my code that I used in loop (both category.php and archive.php

            <?php
query_posts(array(\'posts_per_page\' => 2, \'paged\' => $paged));
$queryObject = new  Wp_Query( array(
\'posts_per_page\' => 2,
\'post_type\' => array(\'post\'),
\'paged\' => $paged,
\'orderby\' => 1,
));
if ( $queryObject->have_posts() ) {
while ( $queryObject->have_posts() ) {
$queryObject->the_post();
?>
<div class=\"shorts\">
<div class=\"shorts1\">
<a class=\"Text3\" href=\"<?php the_permalink(); ?>\"><strong><?php the_title(); ?></strong></a>
<br><br>
<a class=\"Text2\"><?php the_excerpt() ?></a>
<br><br>
<div class=\"more-wrapper\"> 
<div class=\"more\">
<a href=\"<?php the_permalink(); ?>\">Dowiedź się więcej</a>
</div>
</div>
</div>
</div>
</article>
<?php }}  ?>

网友观点：

<?php
query_posts(array(\'posts_per_page\' => 2, \'paged\' => $paged));
$queryObject = new  Wp_Query( array(
\'posts_per_page\' => 2,
\'post_type\' => array(\'post\'),
\'paged\' => $paged,
\'orderby\' => 1,
));
if ( $queryObject->have_posts() ) {
while ( $queryObject->have_posts() ) {
$queryObject->the_post();
?>

<?php
if ( have_posts() ) {
while ( have_posts() ) {
the_post();
?>

###

$categories = get_query_var(\'cat\');
if (!empty($categories)) 
{
$category       =  get_category($cat);
$categoryName   =  $category->name;   
$categorySlug   =  $category->slug;   
$catId          =  $category->cat_ID;
}
$args = array(
\'posts_per_page\'    => 12, 
\'post_type\'         => \'post\',    
\'order\'             =>  \'ASC\',                                  
\'paged\'             => $paged,        
\'tax_query\' => array(
array (
\'taxonomy\'  => \'category\',
\'field\'     => \'slug\',
\'terms\'     => $categorySlug
)
));
$query = NEW WP_Query($args);