WordPress 4.7-scripts

[autoinstalls/wordpress.git] / wp-includes / customize / class-wp-customize-header-image-setting.php

diff --git a/wp-includes/customize/class-wp-customize-header-image-setting.php b/wp-includes/customize/class-wp-customize-header-image-setting.php
index 98b79aed56107b4a4e60a06e7742416740191b0a..af5c516243bbb203685430d5cfd353b136f8e39e 100644 (file)
--- a/wp-includes/customize/class-wp-customize-header-image-setting.php
+++ b/wp-includes/customize/class-wp-customize-header-image-setting.php
@@ -29,6 +29,15 @@ final class WP_Customize_Header_Image_Setting extends WP_Customize_Setting {
        public function update( $value ) {
                global $custom_image_header;
 
+               // If _custom_header_background_just_in_time() fails to initialize $custom_image_header when not is_admin().
+               if ( empty( $custom_image_header ) ) {
+                       require_once( ABSPATH . 'wp-admin/custom-header.php' );
+                       $args = get_theme_support( 'custom-header' );
+                       $admin_head_callback = isset( $args[0]['admin-head-callback'] ) ? $args[0]['admin-head-callback'] : null;
+                       $admin_preview_callback = isset( $args[0]['admin-preview-callback'] ) ? $args[0]['admin-preview-callback'] : null;
+                       $custom_image_header = new Custom_Image_Header( $admin_head_callback, $admin_preview_callback );
+               }
+
                // If the value doesn't exist (removed or random),
                // use the header_image value.
                if ( ! $value )