Only print the parent category (WordPress)

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I am making a blog template for my theme.
But I have one problem…

If I post a post on my blog, I only want to display the parent category of that post.

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So for example, if I post a post with this category hierarchy:
– Vacation
– France
– First Day

I only want that Vacation is displayed on my blog.

Does anyone know how to solve this problem?

Sincerely,
Joren

Post Views: 2

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2 comments 

  1. <?php $parentscategory ="";

foreach((get_the_category()) as $category) {
if ($category->category_parent == 0) {

$parentscategory .= ' <a href="' . get_category_link($category->cat_ID) . '" title="' . $category->name . '">' . $category->name . '</a>, ';

}

}

echo substr($parentscategory,0,-2); ?>

  2. This code maybe useful for you:

    Display posts that have this category (and any children of that category), using category slug: 

    $query = new WP_Query( 'category_name=Vacation' );

    Or

    $category_query_args = array(
    'category_name' => 'Vacation'
);

$category_query = new WP_Query( $category_query_args );

    Please try and let me know.

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