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<title>[56583] trunk/src/wp-content/themes: Bundled Theme: Implement the_header_image_tag function for enhanced compatibility for older core themes.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/56583">56583</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/56583","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>spacedmonkey</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-09-14 11:23:59 +0000 (Thu, 14 Sep 2023)</dd>
</dl>
<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Bundled Theme: Implement the_header_image_tag function for enhanced compatibility for older core themes.
The `the_header_image_tag` function was introduced in WordPress 4.4 as part of <a href="https://core.trac.wordpress.org/changeset/35594">[35594]</a>. It is used in all themes created post WordPress 4.4 that supported header images. The function `get_header_image_tag` continues to get updated with new image features, like lazy loading, async decoding and fetch priority. To ensure our core themes maintain compatibility and benefit from these enhancements, a backward compatibility shim has been applied, integrating the `the_header_image_tag` function into the following core themes:
- Twenty Ten
- Twenty Eleven
- Twenty Twelve
- Twenty Fourteen
- Twenty Sixteen
This change ensures future compatibility and modern image features are applied for header images to these older themes.
Props spacedmonkey, flixos90, mukesh27.
Fixes <a href="https://core.trac.wordpress.org/ticket/58675">#58675</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpcontentthemestwentyelevenfunctionsphp">trunk/src/wp-content/themes/twentyeleven/functions.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentyelevenheaderphp">trunk/src/wp-content/themes/twentyeleven/header.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentyfourteenheaderphp">trunk/src/wp-content/themes/twentyfourteen/header.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentyfourteeninccustomheaderphp">trunk/src/wp-content/themes/twentyfourteen/inc/custom-header.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentysixteenheaderphp">trunk/src/wp-content/themes/twentysixteen/header.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentytenfunctionsphp">trunk/src/wp-content/themes/twentyten/functions.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentytenheaderphp">trunk/src/wp-content/themes/twentyten/header.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentytwelveheaderphp">trunk/src/wp-content/themes/twentytwelve/header.php</a></li>
<li><a href="#trunksrcwpcontentthemestwentytwelveinccustomheaderphp">trunk/src/wp-content/themes/twentytwelve/inc/custom-header.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpcontentthemestwentyelevenfunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentyeleven/functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentyeleven/functions.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentyeleven/functions.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -440,6 +440,39 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> endif; // twentyeleven_admin_header_image()
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+if ( ! function_exists( 'twentyeleven_header_image' ) ) :
+ /**
+ * Custom header image markup displayed.
+ *
+ * @since Twenty Eleven 4.5
+ */
+ function twentyeleven_header_image() {
+ $attrs = array(
+ 'alt' => get_bloginfo( 'name', 'display' ),
+ );
+
+ // Compatibility with versions of WordPress prior to 3.4.
+ if ( function_exists( 'get_custom_header' ) ) {
+ $custom_header = get_custom_header();
+ $attrs['width'] = $custom_header->width;
+ $attrs['height'] = $custom_header->height;
+ } else {
+ $attrs['width'] = HEADER_IMAGE_WIDTH;
+ $attrs['height'] = HEADER_IMAGE_HEIGHT;
+ }
+
+ if ( function_exists( 'the_header_image_tag' ) ) {
+ the_header_image_tag( $attrs );
+ return;
+ }
+
+ ?>
+ <img src="<?php header_image(); ?>" width="<?php echo esc_attr( $attrs['width'] ); ?>" height="<?php echo esc_attr( $attrs['height'] ); ?>" alt="<?php echo esc_attr( $attrs['alt'] ); ?>" />
+ <?php
+ }
+endif; // twentyeleven_header_image()
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Set the post excerpt length to 40 words.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span></span></pre></div>
<a id="trunksrcwpcontentthemestwentyelevenheaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentyeleven/header.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentyeleven/header.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentyeleven/header.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -111,17 +111,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // Houston, we have a new header image!
</span><span class="cx" style="display: block; padding: 0 10px"> echo get_the_post_thumbnail( $post->ID, 'post-thumbnail' );
</span><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // Compatibility with versions of WordPress prior to 3.4.
- if ( function_exists( 'get_custom_header' ) ) {
- $header_image_width = get_custom_header()->width;
- $header_image_height = get_custom_header()->height;
- } else {
- $header_image_width = HEADER_IMAGE_WIDTH;
- $header_image_height = HEADER_IMAGE_HEIGHT;
- }
- ?>
- <img src="<?php header_image(); ?>" width="<?php echo esc_attr( $header_image_width ); ?>" height="<?php echo esc_attr( $header_image_height ); ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" />
- <?php
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ twentyeleven_header_image();
</ins><span class="cx" style="display: block; padding: 0 10px"> } // End check for featured image or standard header.
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </a>
</span></span></pre></div>
<a id="trunksrcwpcontentthemestwentyfourteenheaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentyfourteen/header.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentyfourteen/header.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentyfourteen/header.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -36,7 +36,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> <?php if ( get_header_image() ) : ?>
</span><span class="cx" style="display: block; padding: 0 10px"> <div id="site-header">
</span><span class="cx" style="display: block; padding: 0 10px"> <a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- <img src="<?php header_image(); ?>" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" />
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ <?php twentyfourteen_header_image(); ?>
</ins><span class="cx" style="display: block; padding: 0 10px"> </a>
</span><span class="cx" style="display: block; padding: 0 10px"> </div>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php endif; ?>
</span></span></pre></div>
<a id="trunksrcwpcontentthemestwentyfourteeninccustomheaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentyfourteen/inc/custom-header.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentyfourteen/inc/custom-header.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentyfourteen/inc/custom-header.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -151,3 +151,29 @@
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> endif; // twentyfourteen_admin_header_image()
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+
+if ( ! function_exists( 'twentyfourteen_header_image' ) ) :
+ /**
+ * Create the custom header image markup displayed.
+ *
+ * @see twentyfourteen_custom_header_setup()
+ *
+ * @since Twenty Fourteen 3.8
+ */
+ function twentyfourteen_header_image() {
+ $custom_header = get_custom_header();
+ $attrs = array(
+ 'alt' => get_bloginfo( 'name', 'display' ),
+ 'height' => $custom_header->height,
+ 'width' => $custom_header->width,
+ );
+ if ( function_exists( 'the_header_image_tag' ) ) {
+ the_header_image_tag( $attrs );
+ return;
+ }
+ ?>
+ <img src="<?php header_image(); ?>" width="<?php echo esc_attr( $attrs['width'] ); ?>" height="<?php echo esc_attr( $attrs['height'] ); ?>" alt="<?php echo esc_attr( $attrs['alt'] ); ?>" />
+ <?php
+ }
+endif; // twentyfourteen_header_image()
</ins></span></pre></div>
<a id="trunksrcwpcontentthemestwentysixteenheaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentysixteen/header.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentysixteen/header.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentysixteen/header.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -102,7 +102,17 @@
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> <div class="header-image">
</span><span class="cx" style="display: block; padding: 0 10px"> <a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- <img src="<?php header_image(); ?>" srcset="<?php echo esc_attr( wp_get_attachment_image_srcset( get_custom_header()->attachment_id ) ); ?>" sizes="<?php echo esc_attr( $custom_header_sizes ); ?>" width="<?php echo esc_attr( get_custom_header()->width ); ?>" height="<?php echo esc_attr( get_custom_header()->height ); ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" />
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ <?php
+ $custom_header = get_custom_header();
+ $attrs = array(
+ 'alt' => get_bloginfo( 'name', 'display' ),
+ 'sizes' => $custom_header_sizes,
+ 'height' => $custom_header->height,
+ 'width' => $custom_header->width,
+ );
+
+ the_header_image_tag( $attrs );
+ ?>
</ins><span class="cx" style="display: block; padding: 0 10px"> </a>
</span><span class="cx" style="display: block; padding: 0 10px"> </div><!-- .header-image -->
</span><span class="cx" style="display: block; padding: 0 10px"> <?php endif; // End header image check. ?>
</span></span></pre></div>
<a id="trunksrcwpcontentthemestwentytenfunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentyten/functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentyten/functions.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentyten/functions.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -290,6 +290,39 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> endif;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+if ( ! function_exists( 'twentyten_header_image' ) ) :
+ /**
+ * Custom header image markup displayed.
+ *
+ * @since Twenty Ten 4.0
+ */
+ function twentyten_header_image() {
+ $attrs = array(
+ 'alt' => get_bloginfo( 'name', 'display' ),
+ );
+
+ // Compatibility with versions of WordPress prior to 3.4.
+ if ( function_exists( 'get_custom_header' ) ) {
+ $custom_header = get_custom_header();
+ $attrs['width'] = $custom_header->width;
+ $attrs['height'] = $custom_header->height;
+ } else {
+ $attrs['width'] = HEADER_IMAGE_WIDTH;
+ $attrs['height'] = HEADER_IMAGE_HEIGHT;
+ }
+
+ if ( function_exists( 'the_header_image_tag' ) ) {
+ the_header_image_tag( $attrs );
+ return;
+ }
+
+ ?>
+ <img src="<?php header_image(); ?>" width="<?php echo esc_attr( $attrs['width'] ); ?>" height="<?php echo esc_attr( $attrs['height'] ); ?>" alt="<?php echo esc_attr( $attrs['alt'] ); ?>" />
+ <?php
+ }
+endif; // twentyten_header_image()
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Show a home link for our wp_nav_menu() fallback, wp_page_menu().
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span></span></pre></div>
<a id="trunksrcwpcontentthemestwentytenheaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentyten/header.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentyten/header.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentyten/header.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -95,17 +95,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // Houston, we have a new header image!
</span><span class="cx" style="display: block; padding: 0 10px"> echo get_the_post_thumbnail( $post->ID, 'post-thumbnail' );
</span><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // Compatibility with versions of WordPress prior to 3.4.
- if ( function_exists( 'get_custom_header' ) ) {
- $header_image_width = get_custom_header()->width;
- $header_image_height = get_custom_header()->height;
- } else {
- $header_image_width = HEADER_IMAGE_WIDTH;
- $header_image_height = HEADER_IMAGE_HEIGHT;
- }
- ?>
- <img src="<?php header_image(); ?>" width="<?php echo esc_attr( $header_image_width ); ?>" height="<?php echo esc_attr( $header_image_height ); ?>" alt="" />
- <?php
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ twentyten_header_image();
</ins><span class="cx" style="display: block; padding: 0 10px"> } // End check for featured image or standard header.
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </div><!-- #branding -->
</span></span></pre></div>
<a id="trunksrcwpcontentthemestwentytwelveheaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentytwelve/header.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentytwelve/header.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentytwelve/header.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -54,7 +54,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> </nav><!-- #site-navigation -->
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> <?php if ( get_header_image() ) : ?>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- <a href="<?php echo esc_url( home_url( '/' ) ); ?>"><img src="<?php header_image(); ?>" class="header-image" width="<?php echo esc_attr( get_custom_header()->width ); ?>" height="<?php echo esc_attr( get_custom_header()->height ); ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" /></a>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ <a href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php twentytwelve_header_image(); ?></a>
</ins><span class="cx" style="display: block; padding: 0 10px"> <?php endif; ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </header><!-- #masthead -->
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre></div>
<a id="trunksrcwpcontentthemestwentytwelveinccustomheaderphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentytwelve/inc/custom-header.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentytwelve/inc/custom-header.php 2023-09-14 10:41:24 UTC (rev 56582)
+++ trunk/src/wp-content/themes/twentytwelve/inc/custom-header.php 2023-09-14 11:23:59 UTC (rev 56583)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -166,3 +166,27 @@
</span><span class="cx" style="display: block; padding: 0 10px"> </div>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+
+/**
+ * Output markup to be displayed.
+ *
+ * @since Twenty Twelve 4.1
+ */
+function twentytwelve_header_image() {
+ $custom_header = get_custom_header();
+ $attrs = array(
+ 'alt' => get_bloginfo( 'name', 'display' ),
+ 'class' => 'header-image',
+ 'height' => $custom_header->height,
+ 'width' => $custom_header->width,
+ );
+
+ if ( function_exists( 'the_header_image_tag' ) ) {
+ the_header_image_tag( $attrs );
+ return;
+ }
+ ?>
+ <img src="<?php header_image(); ?>" class="<?php echo esc_attr( $attrs['class'] ); ?>" width="<?php echo esc_attr( $attrs['width'] ); ?>" height="<?php echo esc_attr( $attrs['height'] ); ?>" alt="<?php echo esc_attr( $attrs['alt'] ); ?>" />
+ <?php
+}
</ins></span></pre>
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