Ticket #15827: 15827.diff

src/wp-admin/includes/class-wp-list-table.php

@@ -1006 +1006 @@
                         $this->display_rows_or_placeholder();
                 }
 
-                $rows = ob_get_clean();
+                $rows = wp_check_invalid_utf8( ob_get_clean(), true );
 
                 $response = array( 'rows' => $rows );
 

src/wp-includes/formatting.php

@@ -697 +697 @@
         }
 
         // Attempt to strip the bad chars if requested (not recommended)
-        if ( $strip && function_exists( 'iconv' ) ) {
-                return iconv( 'utf-8', 'utf-8', $string );
+        if ( $strip ) {
+                if ( function_exists( 'iconv' ) ) {
+                        return iconv( 'utf-8', 'utf-8//IGNORE', $string );
+                } elseif ( function_exists( 'mb_convert_encoding' ) ) {
+                        return mb_convert_encoding( $string, 'utf-8', 'utf-8' );
+                }
         }
 
         return '';