Ticket #51362: 51362.diff

src/wp-includes/media.php

@@ -379 +379 @@
 
         $title = $title ? 'title="' . esc_attr( $title ) . '" ' : '';
 
-        $class = 'align' . esc_attr( $align ) . ' size-' . esc_attr( $size ) . ' wp-image-' . $id;
+        $size_class = is_array( $size ) ? implode( 'x', $size ) : $size;
+        $class      = 'align' . esc_attr( $align ) . ' size-' . esc_attr( $size_class ) . ' wp-image-' . $id;
 
         /**
          * Filters the value of the attachment's image tag class attribute.
@@ -2337 +2338 @@
                 </style>\n\t\t";
         }
 
-        $size_class  = sanitize_html_class( $atts['size'] );
+        $size_class  = sanitize_html_class( is_array( $atts['size'] ) ? implode( 'x', $atts['size'] ) : $atts['size'] );
         $gallery_div = "<div id='$selector' class='gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}'>";
 
         /**