Ticket #28303: 28303.patch

src/wp-admin/customize.php

@@ -87 +87 @@
 if ( is_rtl() ) {
         $body_class .= ' rtl';
 }
-$body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_locale() ) ) );
 
+$language_code = wp_get_language_code_of_locale();
+$body_class .= ' locale-' . sanitize_html_class( strtolower( $language_code ) );
+
 if ( $wp_customize->is_theme_active() ) {
         $document_title_tmpl = _x( 'Customize: %s', 'Placeholder is the document title from the preview' );
 } else {

src/wp-admin/includes/class-wp-press-this.php

@@ -1278 +1278 @@
         $admin_body_class .= ' branch-' . str_replace( array( '.', ',' ), '-', floatval( $wp_version ) );
         $admin_body_class .= ' version-' . str_replace( '.', '-', preg_replace( '/^([.0-9]+).*/', '$1', $wp_version ) );
         $admin_body_class .= ' admin-color-' . sanitize_html_class( get_user_option( 'admin_color' ), 'fresh' );
-        $admin_body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_locale() ) ) );
+        $language_code = wp_get_language_code_of_locale();
+        $admin_body_class .= ' locale-' . sanitize_html_class( strtolower( $language_code ) );
 
         /** This filter is documented in wp-admin/admin-header.php */
         $admin_body_classes = apply_filters( 'admin_body_class', '' );

src/wp-admin/includes/template.php

@@ -1647 +1647 @@
 /** This action is documented in wp-admin/admin-header.php */
 do_action( 'admin_head' );
 
-$admin_body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_locale() ) ) );
+$language_code = wp_get_language_code_of_locale();
+$admin_body_class .= ' locale-' . sanitize_html_class( strtolower( $language_code ) );
 
 if ( is_rtl() )
         $admin_body_class .= ' rtl';

src/wp-includes/class-wp-editor.php

@@ -628 +628 @@
                                 }
                         }
 
-                        $body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_locale() ) ) );
+                        $language_code = wp_get_language_code_of_locale();
+                        $body_class .= ' locale-' . sanitize_html_class( strtolower( $language_code ) );
 
                         if ( !empty($set['tinymce']['body_class']) ) {
                                 $body_class .= ' ' . $set['tinymce']['body_class'];

src/wp-includes/general-template.php

@@ -665 +665 @@
                         $output = $wp_version;
                         break;
                 case 'language':
-                        $output = get_locale();
-                        $output = str_replace('_', '-', $output);
+                        $output = wp_get_language_code_of_locale();
                         break;
                 case 'text_direction':
                         _deprecated_argument( __FUNCTION__, '2.2', sprintf(

src/wp-includes/l10n.php

@@ -820 +820 @@
                 if ( substr( $file, -3 ) !== '.po' ) {
                         continue;
                 }
-                if ( ! preg_match( '/(?:(.+)-)?([A-Za-z_]{2,6}).po/', $file, $match ) ) {
+                if ( ! preg_match( '/(?:(.+)-)?([a-z]{2,3}(?:_[A-Z]{2})?(?:_[a-z]+)?).po/', $file, $match ) ) {
                         continue;
                 }
                 if ( ! in_array( substr( $file, 0, -3 ) . '.mo', $files ) )  {
@@ -859 +859 @@
 }
 
 /**
+ * Extract the language code from a locale.
+ *
+ * @since 4.3.0
+ *
+ * @param string $locale Optional. Locale to parse.
+ * @return string Language code.
+ */
+function wp_get_language_code_of_locale( $locale = '' ) {
+        if ( ! $locale ) {
+                $locale = get_locale();
+        }
+
+        preg_match( '/^([a-z]{2,3}(_[A-Z]{2})?)/', $locale, $matches );
+        if ( $matches && $matches[1] ) {
+                return str_replace( '_', '-', $matches[1] );
+        }
+
+        return '';
+}
+
+/**
  * Language selector.
  *
  * @since 4.0.0

src/wp-login.php

@@ -133 +133 @@
                 if ( 'success' ===  $interim_login )
                         $classes[] = 'interim-login-success';
         }
-        $classes[] =' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_locale() ) ) );
+        $language_code = wp_get_language_code_of_locale();
+        $classes[] =' locale-' . sanitize_html_class( strtolower( $language_code ) );
 
         /**
          * Filter the login page body classes.