wp-content/themes/twentythirteen/functions.php:657Prints the attached image with a link to the next attached image.
One hook fires while twentythirteen_the_attached_image() runs, in this order:
Filters the image attachment size to use.
function twentythirteen_the_attached_image() { /** * Filters the image attachment size to use. * * @since Twenty thirteen 1.0 * * @param array $size { * @type int The attachment height in pixels. * @type int The attachment width in pixels. * } */ $attachment_size = apply_filters( 'twentythirteen_attachment_size', array( 724, 724 ) ); $next_attachment_url = wp_get_attachment_url(); $post = get_post(); /* * Grab the IDs of all the image attachments in a gallery so we can get the URL * of the next adjacent image in a gallery, or the first image (if we're * looking at the last image in a gallery), or, in a gallery of one, just the * link to that image file. */ $attachment_ids = get_posts( array( 'post_parent' => $post->post_parent, 'fields' => 'ids', 'numberposts' => -1, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID', ) ); // If there is more than 1 attachment in a gallery... if ( count( $attachment_ids ) > 1 ) { foreach ( $attachment_ids as $idx => $attachment_id ) { if ( $attachment_id === $post->ID ) { $next_id = $attachment_ids[ ( $idx + 1 ) % count( $attachment_ids ) ]; break; } } if ( $next_id ) { // ...get the URL of the next image attachment. $next_attachment_url = get_attachment_link( $next_id ); } else { // ...or get the URL of the first image attachment. $next_attachment_url = get_attachment_link( reset( $attachment_ids ) ); } } printf( '<a href="%1$s" title="%2$s" rel="attachment">%3$s</a>', esc_url( $next_attachment_url ), the_title_attribute( array( 'echo' => false ) ), wp_get_attachment_image( $post->ID, $attachment_size ) ); }Introduced in Twenty Thirteen 1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-content/themes/twentythirteen/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.