Shortcode: CategoryPosts - Content Hub

functions.php

<?php

// WordPress Shortcode - Content Hub: Lists all posts for the first category of a post
// Need help: https://bloggerpilot.com/en/content-hub-wordpress/

function bp_categoryposts() {

    // Get first category
    $categories = get_the_category();
    if ( ! empty( $categories ) ) {
        $category = $categories[0]->name;	
    }

    // The query
    $the_query = new WP_Query( array( 
        'category_name' => $category, 
        'posts_per_page' => 100
    ) ); 
    
    // A little Style
    $list .= '<style>';
    $list .= 'ul.categoryposts {list-style-type:none;}';
    $list .= 'ul.categoryposts li::before {';
    $list .= '    content: "🎂 ";';
    $list .= '}';
    $list .= '</style>';
    
    // The Loop
    if ( $the_query->have_posts() ) {
        $list .= '<span class="h2 wp-block-heading">'.$category.'</span>';
        $list .= '<ul class="categoryposts">';
        while ( $the_query->have_posts() ) {
            $the_query->the_post();
            $list .= '<li><a href="' . get_the_permalink() .'" rel="bookmark">' . get_the_title() .'</a></li>';
        }
    }
    $list .= '</ul>';
    
    return $list;
    
    /* Restore original Post Data */
    wp_reset_postdata();
}

// Add a shortcode
add_shortcode('categoryposts', 'bp_categoryposts');