WordPress自定义分类法(Actors)：实现首页显示今日生日演员

Hey there! Since you’ve already set up the "Actors" custom taxonomy for your movie site, let’s walk through how to show actors who have a birthday today on your homepage. We’ll need to add a birthday field to your Actors taxonomy first, then write a custom query to fetch those actors, and finally display them.

Step 1: Add a Birthday Custom Field to the Actors Taxonomy #

First, we need a way to store each actor’s birthday. Add this code to your functions.php file (make sure to back up the file first!):

// Add birthday field to Actors taxonomy edit page
add_action('edit_term_form_fields', 'add_actor_birthday_field', 10, 2);
function add_actor_birthday_field($term, $taxonomy) {
    // Only target the Actors taxonomy
    if ($taxonomy !== 'actors') return;
    
    $birthday = get_term_meta($term->term_id, 'actor_birthday', true);
    ?>
    <tr class="form-field">
        <th scope="row" valign="top">
            <label for="actor_birthday"><?php _e('Birthday', 'textdomain'); ?></label>
        </th>
        <td>
            <input type="date" name="actor_birthday" id="actor_birthday" value="<?php echo esc_attr($birthday); ?>" class="regular-text">
            <p class="description"><?php _e('Enter the actor\'s birthday (YYYY-MM-DD format)', 'textdomain'); ?></p>
        </td>
    </tr>
    <?php
}

// Save the birthday field when updating an actor term
add_action('edited_term', 'save_actor_birthday_field', 10, 3);
function save_actor_birthday_field($term_id, $tt_id, $taxonomy) {
    if ($taxonomy !== 'actors') return;
    
    if (isset($_POST['actor_birthday'])) {
        update_term_meta($term_id, 'actor_birthday', sanitize_text_field($_POST['actor_birthday']));
    } else {
        delete_term_meta($term_id, 'actor_birthday');
    }
}

Note: Replace 'actors' with your actual Actors taxonomy slug if it’s different.

Step 2: Write a Custom Query to Fetch Today’s Birthday Actors #

Next, we’ll create a function to get actors whose birthday matches today’s month and day. Add this to your functions.php too:

function get_today_birthday_actors() {
    // Get current month and day (format: MM-DD)
    $today_month_day = date('m-d');
    
    $args = array(
        'taxonomy' => 'actors',
        'hide_empty' => false, // Include actors even if no posts are assigned
        'meta_query' => array(
            array(
                'key' => 'actor_birthday',
                'value' => $today_month_day,
                'compare' => 'LIKE',
                'type' => 'DATE'
            )
        )
    );
    
    return get_terms($args);
}

This query looks for actor terms where the actor_birthday meta value ends with today’s MM-DD (since we stored birthdays as YYYY-MM-DD).

Step 3: Display the Actors on Your Homepage #

Now, open your homepage template file (usually front-page.php or index.php) and add this code where you want the birthday actors to appear:

<?php
$birthday_actors = get_today_birthday_actors();

if (!empty($birthday_actors)) {
    echo '<section class="birthday-actors">';
    echo '<h2>🎂 Today\'s Birthday Actors</h2>';
    echo '<ul>';
    foreach ($birthday_actors as $actor) {
        $actor_link = get_term_link($actor);
        $birthday = get_term_meta($actor->term_id, 'actor_birthday', true);
        // Calculate age (optional)
        $age = date_diff(date_create($birthday), date_create('today'))->y;
        
        echo '<li>';
        echo '<a href="' . esc_url($actor_link) . '">' . esc_html($actor->name) . '</a>';
        if ($age) {
            echo ' (' . $age . ' years old)';
        }
        echo '</li>';
    }
    echo '</ul>';
    echo '</section>';
} else {
    echo '<p>No actors have a birthday today.</p>';
}
?>

You can style the .birthday-actors section with CSS to match your site’s design.

Quick Notes #

• Make sure all existing actors have their birthdays added via the Actors taxonomy edit page (under Posts > Actors in your WordPress admin).
• If you stored birthdays in a different format (like DD/MM/YYYY), you’ll need to adjust the meta_query to match that format’s month/day positioning.

内容的提问来源于stack exchange，提问作者Reid C.