Ticket #21389: 21389.2.diff

src/wp-includes/theme.php

@@ -994 +994 @@
 }
 
 /**
+ * Create image markup for a custom header image.
+ *
+ * @since 4.4.0
+ *
+ * @param array $attr Optional. Attributes for the image markup. Default empty.
+ * @return string HTML element or empty string on failure.
+ */
+function get_header_image_tag( $attr = array() ) {
+        $header = get_custom_header();
+
+        if ( empty( $header->attachment_id ) || empty( $header->url ) ) {
+                return '';
+        }
+
+        $width = absint( $header->width );
+        $height = absint( $header->height );
+
+        $defaults = array(
+                'src' => $header->url,
+                'width' => $width,
+                'height' => $height,
+        );
+
+        $size_array = array( $width, $height );
+        $image_meta = get_post_meta( $header->attachment_id, '_wp_attachment_metadata', true );
+        $srcset = wp_calculate_image_srcset( $header->url, $size_array, $image_meta, $header->attachment_id );
+        $sizes = wp_get_attachment_image_sizes( $size_array, $image_meta, $header->attachment_id, $header->url );
+
+        if ( $srcset && $sizes ) {
+                $defaults['srcset'] = $srcset;
+                $defaults['sizes'] = $sizes;
+        }
+
+        $attr = wp_parse_args( $attr, $defaults );
+        $attr = array_map( 'esc_attr', $attr );
+        $html = '<img';
+
+        foreach ( $attr as $name => $value ) {
+                $html .= ' ' . $name . '="' . $value . '"';
+        }
+
+        $html .= ' />';
+
+        /**
+         * Filter the markup of header images.
+         *
+         * @since 4.4.0
+         *
+         * @param string $html   The HTML markup being filtered.
+         * @param object $header The custom header object returned by 'get_custom_header()'
+         * @param array  $attr   An array of attributes for the image markup.
+         */
+        return apply_filters( 'get_header_image_tag',  $html, $header, $attr );
+}
+
+/**
+ * Display the image markup for a custom header image.
+ *
+ * @since 4.4.0
+ *
+ * @param array $attr Optional. Attributes for the image markup. Default empty.
+ */
+function the_header_image_tag( $attr = array() ) {
+        echo get_header_image_tag( $attr );
+}
+
+/**
  * Get random header image data from registered images in theme.
  *
  * @since 3.4.0