Taxonomy and Terms

<?php
//get the taxonomy term in the template
get_the_term_list( $post->ID, 'taxonomy_name', );

//Get term items from a taxonomy
$terms = get_terms( array(
    'taxonomy' => 'taxonomy_name'
) );
foreach($terms as $term){
    echo "<li><a href="{$term->slug}">{$term->name}</a></li>";
}

//get_posts assigned to a specific custom taxonomy term
//https://codex.wordpress.org/Class_Reference/WP_Query#Taxonomy_Parameters
$args = [
    'posts_per_page'    => 4,
    'post_type'         => 'recipes',
    'order'             => 'rand',
    'tax_query'         => array(
        array(
            'taxonomy'  => 'course',
            'field'     => 'slug',
            'terms'     => 'desert'
        )
    ),
];
$query = new WP_Query($args);
while ( $query->have_posts() ) :
    $query->the_post();
    the_title( '<h2>', '</h2>');
endwhile;
wp_reset_postdata();


//To get taxonomy name dynamically
$term = get_queried_object();
$taxonomy = get_taxonomy( $term->taxonomy );
echo $taxonomy->label . ": " . $term->name;

//Show posts and recipes (that is a custom post type)
function print_taxonomy_posts( $query ) {
    if ( !is_admin() && $query->is_main_query() ) {
        if ( is_home() ) {
            $query->set( 'post_type', array( 'post', 'recipes') );
        }
    }
}
add_action( 'pre_get_posts', 'print_taxonomy_posts' );

//Get post type name for every post.
//use in the loop.
if( is_home() ) :
<span class="alert"><?php echo get_post_type(); ?></span>
<?php endif; ?>


//Get posts dynamically based on terms of a taxonomy of posts or custom post types
$terms = get_terms( array(
    'taxonomy' => 'course'
) );

foreach( $terms as $term ){
    echo "<li><a href='{$term->slug}'>{$term->name}</a></li>";
}
function tp_terms_based_posts( $term ) {
    $args = [
        'posts_per_page'    => 4,
        'post_type'         => 'recipes',
        'order'             => 'rand',
        'tax_query'         => array(
            array(
                'taxonomy'  => 'course',
                'field'     => 'slug',
                'terms'     => $term,
            )
        ),
    ];
    $query = new WP_Query($args);
    while ( $query->have_posts() ) :
        $query->the_post();
        echo get_the_title(  );
        echo get_the_post_thumbnail( $post->ID );
    endwhile;
    wp_reset_postdata();
}

foreach ( $term as $term ) {
    tp_terms_based_posts( $term );
}