// NoFestival – Create a custom metabox function nofestival_add_event_date_metabox() { add_meta_box( ‘nofestival_event_date_metabox’, ‘Event Date’, ‘nofestival_display_event_date_metabox’, ‘post’, // You can specify other post types if needed ‘normal’, ‘high’ ); } // NoFestival – Display the custom field in the metabox function nofestival_display_event_date_metabox($post) { $event_date = get_post_meta($post->ID, ‘_event_date’, true); echo ‘<label for=”event_date”>Event Date:</label>’; echo ‘<input type=”date” id=”event_date” …
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