diff --git a/ChangeLog b/ChangeLog
index a83ce90402..cae32fa389 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -63,6 +63,7 @@ phpMyAdmin - ChangeLog
 - issue #12073 Hide edit and delete buttons when the results are not related to a table
 - issue #12083 Fixed parsing of field definition
 - issue #12081 Fixed rendering of table stats
+- issue #11705 Fixed problems with PHP on Windows on table structure
 
 4.5.5.1 (2016-02-29)
 - issue #11971 CREATE UNIQUE INDEX index type is not recognized by parser.
diff --git a/libraries/Index.php b/libraries/Index.php
index 79e70a74eb..7e206736ab 100644
--- a/libraries/Index.php
+++ b/libraries/Index.php
@@ -698,7 +698,11 @@ class Index
         $r .= '<th>' . __('Unique') . '</th>';
         $r .= '<th>' . __('Packed') . '</th>';
         $r .= '<th>' . __('Column') . '</th>';
-        $r .= '<th>' . __('Cardinality') . '</th>';
+        /**
+         * The htmlentities is there to workaround PHP bug on Windows
+         * see https://github.com/phpmyadmin/phpmyadmin/issues/11705
+         */
+        $r .= '<th>' . htmlentities(__('Cardinality')) . '</th>';
         $r .= '<th>' . __('Collation') . '</th>';
         $r .= '<th>' . __('Null') . '</th>';
         $r .= '<th>' . __('Comment') . '</th>';
diff --git a/libraries/Response.php b/libraries/Response.php
index db17a9db37..a7b6fe68f4 100644
--- a/libraries/Response.php
+++ b/libraries/Response.php
@@ -364,7 +364,40 @@ class Response
         // response correctly.
         PMA_headerJSON();
 
-        echo json_encode($this->_JSON);
+        $result = json_encode($this->_JSON);
+        if ($result === false) {
+            switch (json_last_error()) {
+                case JSON_ERROR_NONE:
+                    $error = 'No errors';
+                break;
+                case JSON_ERROR_DEPTH:
+                    $error = 'Maximum stack depth exceeded';
+                break;
+                case JSON_ERROR_STATE_MISMATCH:
+                    $error = 'Underflow or the modes mismatch';
+                break;
+                case JSON_ERROR_CTRL_CHAR:
+                    $error = 'Unexpected control character found';
+                break;
+                case JSON_ERROR_SYNTAX:
+                    $error = 'Syntax error, malformed JSON';
+                break;
+                case JSON_ERROR_UTF8:
+                    $error = 'Malformed UTF-8 characters, possibly incorrectly encoded';
+                break;
+                default:
+                    $error = 'Unknown error';
+                break;
+            }
+            echo json_encode(
+                array(
+                    'success' => false,
+                    'error' => 'JSON encoding failed: ' . $error,
+                )
+            );
+        } else {
+            echo $result;
+        }
     }
 
     /**