diff --git a/ChangeLog b/ChangeLog
index 80c7d8d6b3..7cc7485638 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -44,6 +44,9 @@ phpMyAdmin - ChangeLog
 4.9.3 (not yet released)
 - issue #15570 Fix page contents go underneath of floating menubar in some cases
 - issue #15591 Fix php notice 'Undefined index: foreign_keys_data' on relations view when the user has column access
+- issue #15592 Fix php warning "error_reporting() has been disabled for security reasons"
+- issue #15434 Fix middle click on table sort column name shows a blank page
+- issue        Fix php notice "Undefined index table_create_time" when setting displayed columns on results of a view
 
 4.9.2 (2019-11-21)
 - issue #14184 Change the cookie name from phpMyAdmin to phpMyAdmin_https for HTTPS, fixes many "Failed to set session cookie" errors
diff --git a/libraries/classes/Config.php b/libraries/classes/Config.php
index 2bdcedc046..bbceae8dcc 100644
--- a/libraries/classes/Config.php
+++ b/libraries/classes/Config.php
@@ -779,13 +779,19 @@ class Config
             $this->error_config_default_file = true;
             return false;
         }
-        $old_error_reporting = error_reporting(0);
+        $canUseErrorReporting = function_exists('error_reporting');
+        $oldErrorReporting = null;
+        if ($canUseErrorReporting) {
+            $oldErrorReporting = error_reporting(0);
+        }
         ob_start();
         $GLOBALS['pma_config_loading'] = true;
         $eval_result = include $this->default_source;
         $GLOBALS['pma_config_loading'] = false;
         ob_end_clean();
-        error_reporting($old_error_reporting);
+        if ($canUseErrorReporting) {
+            error_reporting($oldErrorReporting);
+        }
 
         if ($eval_result === false) {
             $this->error_config_default_file = true;
@@ -831,13 +837,19 @@ class Config
          * Parses the configuration file, we throw away any errors or
          * output.
          */
-        $old_error_reporting = error_reporting(0);
+        $canUseErrorReporting = function_exists('error_reporting');
+        $oldErrorReporting = null;
+        if ($canUseErrorReporting) {
+            $oldErrorReporting = error_reporting(0);
+        }
         ob_start();
         $GLOBALS['pma_config_loading'] = true;
         $eval_result = include $this->getSource();
         $GLOBALS['pma_config_loading'] = false;
         ob_end_clean();
-        error_reporting($old_error_reporting);
+        if ($canUseErrorReporting) {
+            error_reporting($oldErrorReporting);
+        }
 
         if ($eval_result === false) {
             $this->error_config_file = true;
diff --git a/libraries/classes/Controllers/Table/RelationController.php b/libraries/classes/Controllers/Table/RelationController.php
index 07633d30d6..af26681fa9 100644
--- a/libraries/classes/Controllers/Table/RelationController.php
+++ b/libraries/classes/Controllers/Table/RelationController.php
@@ -264,8 +264,7 @@ class RelationController extends AbstractController
                     $this->options_array,
                     $this->table,
                     is_array($this->existrel_foreign) && array_key_exists('foreign_keys_data', $this->existrel_foreign)
-                    ? $this->existrel_foreign['foreign_keys_data']
-                    : null
+                    ? $this->existrel_foreign['foreign_keys_data'] : [],
                 );
             $this->response->addHTML($html);
         }
diff --git a/libraries/classes/Display/Results.php b/libraries/classes/Display/Results.php
index b4cd15aebc..98b62ca17e 100644
--- a/libraries/classes/Display/Results.php
+++ b/libraries/classes/Display/Results.php
@@ -1717,6 +1717,7 @@ class Results
             'db'                 => $this->__get('db'),
             'table'              => $this->__get('table'),
             'sql_query'          => $single_sorted_sql_query,
+            'sql_signature'      => Core::signSqlQuery($single_sorted_sql_query),
             'session_max_rows'   => $session_max_rows,
             'is_browse_distinct' => $this->__get('is_browse_distinct'),
         ];
@@ -1725,6 +1726,7 @@ class Results
             'db'                 => $this->__get('db'),
             'table'              => $this->__get('table'),
             'sql_query'          => $multi_sorted_sql_query,
+            'sql_signature'      => Core::signSqlQuery($multi_sorted_sql_query),
             'session_max_rows'   => $session_max_rows,
             'is_browse_distinct' => $this->__get('is_browse_distinct'),
         ];
diff --git a/libraries/classes/ErrorHandler.php b/libraries/classes/ErrorHandler.php
index efefd1e494..f5cf1247ff 100644
--- a/libraries/classes/ErrorHandler.php
+++ b/libraries/classes/ErrorHandler.php
@@ -52,7 +52,9 @@ class ErrorHandler
         if (! defined('TESTSUITE')) {
             set_error_handler([$this, 'handleError']);
         }
-        $this->error_reporting = error_reporting();
+        if (function_exists('error_reporting')) {
+            $this->error_reporting = error_reporting();
+        }
     }
 
     /**
@@ -163,16 +165,23 @@ class ErrorHandler
         string $errfile,
         int $errline
     ): void {
-        /**
-         * Check if Error Control Operator (@) was used, but still show
-         * user errors even in this case.
-         */
-        if (error_reporting() == 0 &&
-            $this->error_reporting != 0 &&
-            ($errno & (E_USER_WARNING | E_USER_ERROR | E_USER_NOTICE)) == 0
-        ) {
-            return;
+        if (function_exists('error_reporting')) {
+            /**
+            * Check if Error Control Operator (@) was used, but still show
+            * user errors even in this case.
+            */
+            if (error_reporting() == 0 &&
+                $this->error_reporting != 0 &&
+                ($errno & (E_USER_WARNING | E_USER_ERROR | E_USER_NOTICE)) == 0
+            ) {
+                return;
+            }
+        } else {
+            if (($errno & (E_USER_WARNING | E_USER_ERROR | E_USER_NOTICE)) == 0) {
+                return;
+            }
         }
+
         $this->addError($errstr, $errno, $errfile, $errline, true);
     }
 
diff --git a/libraries/classes/Sql.php b/libraries/classes/Sql.php
index e56df246b5..fb4b07f3f1 100644
--- a/libraries/classes/Sql.php
+++ b/libraries/classes/Sql.php
@@ -643,7 +643,7 @@ class Sql
         $retval = $pmatable->setUiProp(
             $property_to_set,
             $property_value,
-            $_POST['table_create_time']
+            isset($_POST['table_create_time']) ? $_POST['table_create_time'] : null
         );
         if (gettype($retval) != 'boolean') {
             $response = Response::getInstance();
diff --git a/show_config_errors.php b/show_config_errors.php
index 68e6826f43..46d854af9b 100644
--- a/show_config_errors.php
+++ b/show_config_errors.php
@@ -34,7 +34,10 @@ header('Content-Type: text/html; charset=utf-8');
 
 require ROOT_PATH . 'libraries/vendor_config.php';
 
-error_reporting(E_ALL);
+if (function_exists('error_reporting')) {
+    error_reporting(E_ALL);
+}
+
 /**
  * Read config file.
  */