diff --git a/libraries/common.inc.php b/libraries/common.inc.php
index 356f8fec02..425e1f974a 100644
--- a/libraries/common.inc.php
+++ b/libraries/common.inc.php
@@ -521,25 +521,13 @@ if ($token_mismatch) {
  * current selected database
  * @global string $GLOBALS['db']
  */
-$GLOBALS['db'] = '';
-if (PMA_isValid($_REQUEST['db'])) {
-    // can we strip tags from this?
-    // only \ and / is not allowed in db names for MySQL
-    $GLOBALS['db'] = $_REQUEST['db'];
-    $GLOBALS['url_params']['db'] = $GLOBALS['db'];
-}
+PMA_setGlobalDbOrTable('db');
 
 /**
  * current selected table
  * @global string $GLOBALS['table']
  */
-$GLOBALS['table'] = '';
-if (PMA_isValid($_REQUEST['table'])) {
-    // can we strip tags from this?
-    // only \ and / is not allowed in table names for MySQL
-    $GLOBALS['table'] = $_REQUEST['table'];
-    $GLOBALS['url_params']['table'] = $GLOBALS['table'];
-}
+PMA_setGlobalDbOrTable('table');
 
 /**
  * Store currently selected recent table.
diff --git a/libraries/core.lib.php b/libraries/core.lib.php
index e7915c2c01..210d3294c4 100644
--- a/libraries/core.lib.php
+++ b/libraries/core.lib.php
@@ -1029,4 +1029,22 @@ function PMA_setPostAsGlobal($post_patterns)
         }
     }
 }
+
+/**
+ * Creates some globals from $_REQUEST
+ *
+ * @param string $param db|table 
+ *
+ * @return void
+ */
+function PMA_setGlobalDbOrTable($param)
+{
+    $GLOBALS[$param] = '';
+    if (PMA_isValid($_REQUEST[$param])) {
+        // can we strip tags from this?
+        // only \ and / is not allowed in db names for MySQL
+        $GLOBALS[$param] = $_REQUEST[$param];
+        $GLOBALS['url_params'][$param] = $GLOBALS[$param];
+    }
+}
 ?>