Random WordPress Function

Function Signature:

the_category_id

Function Description:

Returns or prints a category ID.

Function Examples:

⚠️ Examples below are generated with GPT-3 once every hour. Do not take them too seriously.
Consider them as some extra input in your learning process - reason about them. Will it work? What could fail?

// Basic usage of the_category_id to display the ID of the first category assigned to a post
$post_categories = get_the_category();
$first_category_id = $post_categories[0]->term_id;
the_category_id( $first_category_id );

// Using the_category_id within a loop to display the category ID for each post
$args = array( 'post_type' => 'post' );
$query = new WP_Query( $args );
if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {
        $query->the_post();
        the_category_id();
    }
    wp_reset_postdata();
}

// Avoiding common pitfall by passing the post ID as a parameter to the_category_id
$post_id = get_the_ID();
the_category_id( $post_id );