Ticket #30076: 30076.2.patch

wp-content/themes/twentyfifteen/inc/template-tags.php

@@ -272 +272 @@
         <?php else : ?>
 
         <a class="post-thumbnail" href="<?php the_permalink(); ?>">
-                <?php the_post_thumbnail(); ?>
+                <?php
+                        $thumbnail_id = get_post_thumbnail_id();
+                        $alt = get_post_meta( $thumbnail_id, '_wp_attachment_image_alt', true );
+                        $alt = ( $alt != '' ) ? "$alt; " : '';
+                        $args = array( 
+                                                'alt' => sprintf( __( '%1$sPermalink to %2$s', 'twentyfifteen' ), $alt, get_the_title() )
+                                        );
+                        the_post_thumbnail( 'post-thumbnail', $args ); 
+                ?>
         </a>
 
         <?php endif; // End is_singular()