list-virtual.php:

- remember domain and page browser offset in $_SESSION
  (fixes 50% of http://sourceforge.net/p/postfixadmin/bugs/298/ )
- various cleanups

functions.inc.php:
- add safesession() (like safeget(), but for $_SESSION)



git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@1593 a1433add-5e2c-0410-b055-b7f2511e0802

functions.inc.php

@@ -361,6 +361,20 @@ function safecookie ($param, $default="") {
     return $retval;
 }
 
+/**
+ * safesession
+ * @see safeget()
+ * @param String $param 
+ * @param String $default (optional)
+ * @return String value from $_SESSION[$param] or $default
+ */
+function safesession ($param, $default="") {
+    $retval=$default;
+    if (isset($_SESSION[$param])) $retval=$_SESSION[$param];
+    return $retval;
+}
+
+
 /**
  * pacol
  * @param int $allow_editing