From 95767decb070effd86a8cff96ac3859792cc1e9b Mon Sep 17 00:00:00 2001
From: IanDelMar <42134098+IanDelMar@users.noreply.github.com>
Date: Sun, 18 Nov 2018 16:26:49 +0100
Subject: [PATCH] Conditionally add pingback

and allow child theme to remove it without changing the header.php.
---
 header.php     |  1 -
 inc/extras.php | 12 +++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/header.php b/header.php
index f286048d..c1f1d33e 100644
--- a/header.php
+++ b/header.php
@@ -22,7 +22,6 @@ $container = get_theme_mod( 'understrap_container_type' );
 	<meta name="apple-mobile-web-app-capable" content="yes">
 	<meta name="apple-mobile-web-app-title" content="<?php bloginfo( 'name' ); ?> - <?php bloginfo( 'description' ); ?>">
 	<link rel="profile" href="http://gmpg.org/xfn/11">
-	<link rel="pingback" href="<?php bloginfo( 'pingback_url' ); ?>">
 	<?php wp_head(); ?>
 </head>
 
diff --git a/inc/extras.php b/inc/extras.php
index 404dfb7a..2ea36852 100644
--- a/inc/extras.php
+++ b/inc/extras.php
@@ -111,4 +111,14 @@ if ( ! function_exists ( 'understrap_post_nav' ) ) {
 
 		<?php
 	}
-}
\ No newline at end of file
+}
+
+/**
+ * Add a pingback url auto-discovery header for single posts of any post type.
+ */
+function understrap_pingback() {
+	if ( is_singular() && pings_open() ) {
+		echo '<link rel="pingback" href="' . esc_url( get_bloginfo( 'pingback_url' ) ) . '">' . "\n";
+	}
+}
+add_action( 'wp_head', 'understrap_pingback' );