article-cover.php

<?php
/**
 * Facebook Instant Article Cover template, containing the following info:
 *
 * 1) Media type: Image, Video or Slideshow
 * 2) Title
 * 3) Subtitle
 * 4) Author(s)
 * 5) Kicker (aka "A tertiary blurb in the headline of the article.")
 * 6) Published Time
 * 7) Modified Time
 *
 * @see https://developers.facebook.com/docs/instant-articles/guides/articlecreate#specify-cover
 */
?>
<header>

	<?php // Kickers aren't really a universal thing on WordPress, so let's just add a filter here for people to hook onto. ?>
	<?php $kicker = apply_filters( 'simple_fb_kicker', '', get_the_ID() ); ?>
	<?php if ( ! empty( $kicker ) ) : ?>
		<details>
			<summary><?php echo esc_html( $kicker ); ?></summary>
		</details>
	<?php endif; ?>

	<?php

	$full_width_video  = get_post_meta( get_the_ID(), '_format_video_embed', true );
	$has_article_cover = ! empty( $full_width_video );
	$thumbnail_id      = get_post_thumbnail_id();

	// Post featured image as FB IA cover image.
	if ( ! $has_article_cover && $thumbnail_id ) {
		Simple_FB_Instant_Articles::instance()->render_image_markup( $thumbnail_id );
	}

	the_title( '<h1>', '</h1>' );

	if ( function_exists( 'the_subheading' ) ) {
		the_subheading( '<h2>', '</h2>' );
	}

	?>

	<?php if ( function_exists( 'coauthors' ) ) : ?>
		<?php coauthors( '</address>, <address>', ' </address> and <address> ', '<address>', '</address>' ); ?>
	<?php else : ?>
		<address><?php the_author(); ?></address>
	<?php endif; ?>

	<!-- The published and last modified time stamps -->
	<time class="op-published" dateTime="<?php echo esc_attr( get_the_time( 'c' ) ); ?>"><?php echo esc_attr( get_post_time( 'Y-m-d\TH:i:s\Z' ) ); ?></time>
	<time class="op-modified" dateTime="<?php echo esc_attr( get_the_modified_time( 'c' ) ); ?>"><?php echo esc_attr( get_the_modified_date('Y-m-d\TH:i:s\Z') ); ?></time>

	<?php

	$ad_template = __DIR__ . '/script-ad.php';

	if ( file_exists( $ad_template ) ) {
		include( $ad_template );
	}

	?>

</header>