if ( defined( 'WP_IMPORTING'
) ) { return;
} if ( get_option( 'default_pingback_flag'
) ) { add_post_meta( $post_id, '_pingme', '1', true
);
} add_post_meta( $post_id, '_encloseme', '1', true
);
$to_ping =
get_to_ping( $post_id );
if ( !
empty( $to_ping ) ) { add_post_meta( $post_id, '_trackbackme', '1'
);
} if ( !
wp_next_scheduled( 'do_pings'
) ) { wp_schedule_single_event( time(), 'do_pings'
);
}}/**
* Returns the ID of the post's parent.
*
* @since 3.1.0
* @since 5.9.0 The `$post` parameter was made optional.
*
* @param int|WP_Post|null $post Optional. Post ID or post object. Defaults to global $post.
* @return int|false Post parent ID (which can be 0 if there is no parent),
* or false if the post does not exist.
*/