Improve security of sessions:

- use only cookies to store session id on client side
- use default php session system with database handler to store sessions on server side

git-svn-id: http://piwigo.org/svn/trunk@1004 68402e56-0260-453c-a942-63ccdbb3a9ee

20 files changed, 72 insertions, 97 deletions

diff --git a/admin.php b/admin.php
index 1e9304171..107b4a40b 100644
--- a/admin.php
+++ b/admin.php
@@ -65,29 +65,29 @@ $template->set_filenames(array('admin' => 'admin.tpl'));
 
 $template->assign_vars(
   array(
-    'U_HISTORY'=>add_session_id($link_start.'stats' ),
-    'U_FAQ'=>add_session_id($link_start.'help' ),
-    'U_SITES'=>add_session_id($link_start.'remote_site'),
-    'U_MAINTENANCE'=>add_session_id($link_start.'maintenance'),
-    'U_CONFIG_GENERAL'=>add_session_id($conf_link.'general' ),
-    'U_CONFIG_COMMENTS'=>add_session_id($conf_link.'comments' ),
-    'U_CONFIG_DISPLAY'=>add_session_id($conf_link.'default' ),
-    'U_CATEGORIES'=>add_session_id($link_start.'cat_list' ),
-    'U_MOVE'=>add_session_id($link_start.'cat_move' ),
-    'U_CAT_UPLOAD'=>add_session_id($opt_link.'upload'),
-    'U_CAT_COMMENTS'=>add_session_id($opt_link.'comments'),
-    'U_CAT_VISIBLE'=>add_session_id($opt_link.'visible'),
-    'U_CAT_STATUS'=>add_session_id($opt_link.'status'),
-    'U_CAT_OPTIONS'=>add_session_id($link_start.'cat_options'),
-    'U_CAT_UPDATE'=>add_session_id($link_start.'update'),
-    'U_WAITING'=>add_session_id($link_start.'waiting' ),
-    'U_COMMENTS'=>add_session_id($link_start.'comments' ),
-    'U_CADDIE'=>add_session_id($link_start.'element_set&cat=caddie'),
-    'U_THUMBNAILS'=>add_session_id($link_start.'thumbnail' ),
-    'U_USERS'=>add_session_id($link_start.'user_list' ),
-    'U_GROUPS'=>add_session_id($link_start.'group_list' ),
-    'U_RETURN'=>add_session_id(PHPWG_ROOT_PATH.'category.php'),
-    'U_ADMIN'=>add_session_id( PHPWG_ROOT_PATH.'admin.php' ),
+    'U_HISTORY'=> $link_start.'stats',
+    'U_FAQ'=> $link_start.'help',
+    'U_SITES'=> $link_start.'remote_site',
+    'U_MAINTENANCE'=> $link_start.'maintenance',
+    'U_CONFIG_GENERAL'=> $conf_link.'general',
+    'U_CONFIG_COMMENTS'=> $conf_link.'comments',
+    'U_CONFIG_DISPLAY'=> $conf_link.'default',
+    'U_CATEGORIES'=> $link_start.'cat_list',
+    'U_MOVE'=> $link_start.'cat_move',
+    'U_CAT_UPLOAD'=> $opt_link.'upload',
+    'U_CAT_COMMENTS'=> $opt_link.'comments',
+    'U_CAT_VISIBLE'=> $opt_link.'visible',
+    'U_CAT_STATUS'=> $opt_link.'status',
+    'U_CAT_OPTIONS'=> $link_start.'cat_options',
+    'U_CAT_UPDATE'=> $link_start.'update',
+    'U_WAITING'=> $link_start.'waiting',
+    'U_COMMENTS'=> $link_start.'comments',
+    'U_CADDIE'=> $link_start.'element_set&cat=caddie',
+    'U_THUMBNAILS'=> $link_start.'thumbnail',
+    'U_USERS'=> $link_start.'user_list',
+    'U_GROUPS'=> $link_start.'group_list',
+    'U_RETURN'=> PHPWG_ROOT_PATH.'category.php'
+    'U_ADMIN'=> PHPWG_ROOT_PATH.'admin.php',
     'L_ADMIN' => $lang['admin'],
     'L_ADMIN_HINT' => $lang['hint_admin']
     )
@@ -98,7 +98,7 @@ if ($conf['allow_random_representative'])
   $template->assign_block_vars(
     'representative',
     array(
-      'URL' => add_session_id($opt_link.'representative')
+      'URL' => $opt_link.'representative'
       )
     );
 }
diff --git a/admin/cat_list.php b/admin/cat_list.php
index f7652db73..3acbbad5e 100644
--- a/admin/cat_list.php
+++ b/admin/cat_list.php
@@ -65,7 +65,7 @@ function save_categories_order($categories)
 $categories = array();
 
 $base_url = PHPWG_ROOT_PATH.'admin.php?page=cat_list';
-$navigation = '<a class="" href="'.add_session_id($base_url).'">';
+$navigation = '<a class="" href="'.$base_url.'">';
 $navigation.= $lang['home'];
 $navigation.= '</a>';
 
@@ -238,7 +238,7 @@ else
 $template->assign_vars(array(
   'CATEGORIES_NAV'=>$navigation,
   'NEXT_RANK'=>$next_rank,
-  'F_ACTION'=>add_session_id($form_action),
+  'F_ACTION'=>$form_action,
   
   'L_ADD_VIRTUAL'=>$lang['cat_add'],
   'L_SUBMIT'=>$lang['submit'],
@@ -318,14 +318,9 @@ foreach ($categories as $category)
       'ID'=>$category['id'],
       'RANK'=>$category['rank']*10,
 
-      'U_JUMPTO'=>
-      add_session_id(PHPWG_ROOT_PATH.'category.php?cat='.$category['id']),
-      
-      'U_CHILDREN'=>
-      add_session_id($cat_list_url.'&amp;parent_id='.$category['id']),
-      
-      'U_EDIT'=>
-      add_session_id($base_url.'cat_modify&amp;cat_id='.$category['id'])
+      'U_JUMPTO'=>PHPWG_ROOT_PATH.'category.php?cat='.$category['id'],
+      'U_CHILDREN'=>$cat_list_url.'&amp;parent_id='.$category['id'],      
+      'U_EDIT'=>$base_url.'cat_modify&amp;cat_id='.$category['id']
       )
     );
   
@@ -334,7 +329,7 @@ foreach ($categories as $category)
     $template->assign_block_vars(
       'category.delete',
       array(
-        'URL'=>add_session_id($self_url.'&amp;delete='.$category['id'])
+        'URL'=>$self_url.'&amp;delete='.$category['id']
         )
       );
   }
@@ -344,7 +339,7 @@ foreach ($categories as $category)
     $template->assign_block_vars(
       'category.elements',
       array(
-        'URL'=>add_session_id($base_url.'element_set&amp;cat='.$category['id'])
+        'URL'=>$base_url.'element_set&amp;cat='.$category['id']
         )
       );
   }
@@ -354,7 +349,7 @@ foreach ($categories as $category)
     $template->assign_block_vars(
       'category.permissions',
       array(
-        'URL'=>add_session_id($base_url.'cat_perm&amp;cat='.$category['id'])
+        'URL'=>$base_url.'cat_perm&amp;cat='.$category['id']
         )
       );
   }
diff --git a/admin/cat_modify.php b/admin/cat_modify.php
index 0d82c13d4..8291e9030 100644
--- a/admin/cat_modify.php
+++ b/admin/cat_modify.php
@@ -171,13 +171,11 @@ $template->assign_vars(array(
   'L_SUBMIT'=>$lang['submit'],
   'L_SET_RANDOM_REPRESENTANT'=>$lang['cat_representant'],
 
-  'U_JUMPTO'=>
-    add_session_id(PHPWG_ROOT_PATH.'category.php?cat='.$category['id']),
-  'U_CHILDREN'=>
-    add_session_id($cat_list_url.'&amp;parent_id='.$category['id']),
+  'U_JUMPTO'=>PHPWG_ROOT_PATH.'category.php?cat='.$category['id'],
+  'U_CHILDREN'=>$cat_list_url.'&amp;parent_id='.$category['id'],
   'U_HELP' => PHPWG_ROOT_PATH.'/popuphelp.php?page=cat_modify',
    
-  'F_ACTION'=>add_session_id($form_action)
+  'F_ACTION'=>$form_action
   ));
 
 
@@ -186,7 +184,7 @@ if ('private' == $category['status'])
   $template->assign_block_vars(
     'permissions',
     array(
-      'URL'=>add_session_id($base_url.'cat_perm&amp;cat='.$category['id'])
+      'URL'=>$base_url.'cat_perm&amp;cat='.$category['id']
         )
     );
 }
@@ -197,7 +195,7 @@ if ($category['nb_images'] > 0)
   $template->assign_block_vars(
     'elements',
     array(
-      'URL'=>add_session_id($base_url.'element_set&amp;cat='.$category['id'])
+      'URL'=>$base_url.'element_set&amp;cat='.$category['id']
       )
     );
 }
@@ -267,7 +265,7 @@ else
   $template->assign_block_vars(
     'delete',
     array(
-      'URL'=>add_session_id($self_url.'&amp;delete='.$category['id'])
+      'URL'=>$self_url.'&amp;delete='.$category['id']
       )
     );
 
diff --git a/admin/cat_move.php b/admin/cat_move.php
index 7760b6494..0d030dca0 100644
--- a/admin/cat_move.php
+++ b/admin/cat_move.php
@@ -68,7 +68,7 @@ $template->set_filenames(
 
 $template->assign_vars(
   array(
-    'F_ACTION' => add_session_id(PHPWG_ROOT_PATH.'admin.php?page=cat_move'),
+    'F_ACTION' => PHPWG_ROOT_PATH.'admin.php?page=cat_move',
     )
   );
   
diff --git a/admin/cat_options.php b/admin/cat_options.php
index f8ca7527b..a43a4ec61 100644
--- a/admin/cat_options.php
+++ b/admin/cat_options.php
@@ -153,7 +153,7 @@ $template->assign_vars(
 
     'U_HELP' => PHPWG_ROOT_PATH.'/popuphelp.php?page=cat_options',
     
-    'F_ACTION'=>add_session_id($base_url.$page['section'])
+    'F_ACTION'=>$base_url.$page['section']
    )
  );
 
diff --git a/admin/cat_perm.php b/admin/cat_perm.php
index f0c961103..95e9edaa9 100644
--- a/admin/cat_perm.php
+++ b/admin/cat_perm.php
@@ -207,10 +207,7 @@ $template->assign_vars(
         'admin.php?page=cat_modify&amp;cat_id='
         ),
     'U_HELP' => PHPWG_ROOT_PATH.'/popuphelp.php?page=cat_perm',
-    'F_ACTION' =>
-      add_session_id(
-        PHPWG_ROOT_PATH.'admin.php?page=cat_perm&amp;cat='.$page['cat']
-        )
+    'F_ACTION' => PHPWG_ROOT_PATH.'admin.php?page=cat_perm&amp;cat='.$page['cat']
     )
   );
 
diff --git a/admin/comments.php b/admin/comments.php
index 53d498c84..ef366c783 100644
--- a/admin/comments.php
+++ b/admin/comments.php
@@ -117,7 +117,7 @@ $template->set_filenames(array('comments'=>'admin/comments.tpl'));
 
 $template->assign_vars(
   array(
-    'F_ACTION' => add_session_id(PHPWG_ROOT_PATH.'admin.php?page=comments')
+    'F_ACTION' => PHPWG_ROOT_PATH.'admin.php?page=comments'
     )
   );
 
@@ -141,10 +141,8 @@ while ($row = mysql_fetch_array($result))
     'comment',
     array(
       'U_PICTURE' =>
-        add_session_id(
           PHPWG_ROOT_PATH.'admin.php?page=picture_modify'.
-          '&amp;image_id='.$row['image_id']
-          ),
+          '&amp;image_id='.$row['image_id'],
       'ID' => $row['id'],
       'TN_SRC' => get_thumbnail_src($row['path'], @$row['tn_ext']),
       'AUTHOR' => $row['author'],
diff --git a/admin/configuration.php b/admin/configuration.php
index bb1c82646..0d0ee4476 100644
--- a/admin/configuration.php
+++ b/admin/configuration.php
@@ -149,7 +149,7 @@ $template->assign_vars(
 
     'U_HELP' => PHPWG_ROOT_PATH.'/popuphelp.php?page=configuration',
     
-    'F_ACTION'=>add_session_id($action)
+    'F_ACTION'=>$action
     ));
 
 switch ($page['section'])
diff --git a/admin/element_set_unit.php b/admin/element_set_unit.php
index fbffe99dd..f3bf12bbd 100644
--- a/admin/element_set_unit.php
+++ b/admin/element_set_unit.php
@@ -222,10 +222,8 @@ SELECT id,path,tn_ext,name,date_creation,comment,keywords,author,file
           !empty($row['name']) ?
             $row['name'] : get_name_from_file($row['file']),
         'U_EDIT' =>
-          add_session_id(
             PHPWG_ROOT_PATH.'admin.php?page=picture_modify'.
-            '&amp;image_id='.$row['id']
-            ),
+            '&amp;image_id='.$row['id'],
         'ID' => $row['id'],
         'FILENAME' => $row['path'],
         'TN_SRC' => $src,
diff --git a/admin/group_list.php b/admin/group_list.php
index 7bc08b3f4..0a9946fe5 100644
--- a/admin/group_list.php
+++ b/admin/group_list.php
@@ -124,8 +124,7 @@ $template->set_filenames(array('group_list' => 'admin/group_list.tpl'));
 
 $template->assign_vars(
   array(
-    'F_ADD_ACTION' =>
-      add_session_id(PHPWG_ROOT_PATH.'admin.php?page=group_list')
+    'F_ADD_ACTION' => PHPWG_ROOT_PATH.'admin.php?page=group_list'
     )
   );
 
diff --git a/admin/group_perm.php b/admin/group_perm.php
index 5c974008e..2c474eb89 100644
--- a/admin/group_perm.php
+++ b/admin/group_perm.php
@@ -140,11 +140,9 @@ $template->assign_vars(
     'L_CAT_OPTIONS_INFO'=>$lang['permuser_info'],
     
     'F_ACTION' =>
-      add_session_id(
         PHPWG_ROOT_PATH.
         'admin.php?page=group_perm&amp;group_id='.
         $page['group']
-        )
     )
   );
   
diff --git a/admin/intro.php b/admin/intro.php
index 71a657c03..a72171ec0 100644
--- a/admin/intro.php
+++ b/admin/intro.php
@@ -175,10 +175,8 @@ $template->assign_vars(
     'DB_USERS' => sprintf(l10n('%d users'), $nb_users),
     'DB_GROUPS' => sprintf(l10n('%d groups'), $nb_groups),
     'DB_COMMENTS' => sprintf(l10n('%d comments'), $nb_comments),
-    'U_CHECK_UPGRADE' =>
-      add_session_id(PHPWG_ROOT_PATH.'admin.php?action=check_upgrade'),
-    'U_PHPINFO' =>
-      add_session_id(PHPWG_ROOT_PATH.'admin.php?action=phpinfo')
+    'U_CHECK_UPGRADE' => PHPWG_ROOT_PATH.'admin.php?action=check_upgrade',
+    'U_PHPINFO' => PHPWG_ROOT_PATH.'admin.php?action=phpinfo'
     )
   );
 
@@ -215,7 +213,7 @@ if ($nb_waiting > 0)
   $template->assign_block_vars(
     'waiting',
     array(
-      'URL' => add_session_id(PHPWG_ROOT_PATH.'admin.php?page=waiting'),
+      'URL' => PHPWG_ROOT_PATH.'admin.php?page=waiting',
       'INFO' => sprintf(l10n('%d waiting for validation'), $nb_waiting)
       )
     );
@@ -234,7 +232,7 @@ if ($nb_comments > 0)
   $template->assign_block_vars(
     'unvalidated',
     array(
-      'URL' => add_session_id(PHPWG_ROOT_PATH.'admin.php?page=comments'),
+      'URL' => PHPWG_ROOT_PATH.'admin.php?page=comments',
       'INFO' => sprintf(l10n('%d waiting for validation'), $nb_comments)
       )
     );
diff --git a/admin/maintenance.php b/admin/maintenance.php
index ec45196db..067f1ff82 100644
--- a/admin/maintenance.php
+++ b/admin/maintenance.php
@@ -98,11 +98,11 @@ $start_url = PHPWG_ROOT_PATH.'admin.php?page=maintenance&amp;action=';
 
 $template->assign_vars(
   array(
-    'U_MAINT_CATEGORIES' => add_session_id($start_url.'categories'),
-    'U_MAINT_IMAGES' => add_session_id($start_url.'images'),
-    'U_MAINT_HISTORY' => add_session_id($start_url.'history'),
-    'U_MAINT_SESSIONS' => add_session_id($start_url.'sessions'),
-    'U_MAINT_FEEDS' => add_session_id($start_url.'feeds'),
+    'U_MAINT_CATEGORIES' => $start_url.'categories',
+    'U_MAINT_IMAGES' => $start_url.'images',
+    'U_MAINT_HISTORY' => $start_url.'history',
+    'U_MAINT_SESSIONS' => $start_url.'sessions',
+    'U_MAINT_FEEDS' => $start_url.'feeds',
     'U_HELP' => PHPWG_ROOT_PATH.'/popuphelp.php?page=maintenance',
     )
   );
diff --git a/admin/picture_modify.php b/admin/picture_modify.php
index a8fa2b953..097857ec5 100644
--- a/admin/picture_modify.php
+++ b/admin/picture_modify.php
@@ -195,12 +195,10 @@ $template->set_filenames(
 $template->assign_vars(
   array(
     'U_SYNC' =>
-      add_session_id(
         PHPWG_ROOT_PATH.'admin.php?page=picture_modify'.
         '&amp;image_id='.$_GET['image_id'].
         (isset($_GET['cat_id']) ? '&amp;cat_id='.$_GET['cat_id'] : '').
-        '&amp;sync_metadata=1'
-        ),
+        '&amp;sync_metadata=1',
     
     'PATH'=>$row['path'],
     
@@ -230,10 +228,8 @@ $template->assign_vars(
         stripslashes($_POST['description']) : @$row['comment'],
   
     'F_ACTION' =>
-      add_session_id(
         PHPWG_ROOT_PATH.'admin.php'
         .get_query_string_diff(array('sync_metadata'))
-        )
     )
   );
 
diff --git a/admin/remote_site.php b/admin/remote_site.php
index fb778084f..1ce1813a2 100644
--- a/admin/remote_site.php
+++ b/admin/remote_site.php
@@ -515,7 +515,7 @@ $template->assign_vars(
 
     'U_HELP' => PHPWG_ROOT_PATH.'/popuphelp.php?page=remote_site',
     
-    'F_ACTION'=>add_session_id(PHPWG_ROOT_PATH.'admin.php?page=remote_site')
+    'F_ACTION'=>PHPWG_ROOT_PATH.'admin.php?page=remote_site'
    )
  );
  
@@ -686,7 +686,7 @@ else
       'local',
       array(
         'URL' => $url,
-        'U_UPDATE' => add_session_id($base_url.'local_update')
+        'U_UPDATE' => $base_url.'local_update'
         )
       );
 
@@ -731,10 +731,10 @@ while ($row = mysql_fetch_array($result))
     'sites.site',
     array(
       'NAME' => $row['galleries_url'],
-      'U_GENERATE' => add_session_id($base_url.'generate'),
-      'U_UPDATE' => add_session_id($base_url.'update'),
-      'U_CLEAN' => add_session_id($base_url.'clean'),
-      'U_DELETE' => add_session_id($base_url.'delete')
+      'U_GENERATE' => $base_url.'generate',
+      'U_UPDATE' => $base_url.'update',
+      'U_CLEAN' => $base_url.'clean',
+      'U_DELETE' => $base_url.'delete'
      )
    );
 }
diff --git a/admin/stats.php b/admin/stats.php
index 1a821a476..02d7ec5d8 100644
--- a/admin/stats.php
+++ b/admin/stats.php
@@ -62,7 +62,7 @@ if (isset($_GET['day']) && isset($_GET['month']) && isset($_GET['year']) )
   $date_of_day=$_GET['day'].' '.$lang['month'][$_GET['month']].' '.$_GET['year'];
   $title_page=$lang['stats_day_title'].' du '.$date_of_day;
   $url_back = PHPWG_ROOT_PATH."admin.php?page=stats";
-  $url_back = add_session_id($url_back);
+  $url_back = $url_back;
   $title_details='<a href='.$url_back.'>'.$lang['stats_day_title'].'</a>';
   $title_day = $date_of_day;
 }
@@ -71,7 +71,7 @@ elseif ( isset($_GET['month']) && isset($_GET['year']) )
   $date_of_day=$lang['month'][$_GET['month']].' '.$_GET['year'];
   $title_page=$lang['stats_month_title'].' : '.$date_of_day;
   $url_back = PHPWG_ROOT_PATH."admin.php?page=stats";
-  $url_back = add_session_id($url_back);
+  $url_back = $url_back;
   $title_details='<a href='.$url_back.'>'.$lang['stats_day_title'].'</a>';
   $title_day=$lang['today'];
 }
@@ -105,7 +105,7 @@ $template->assign_vars(array(
   'L_STAT_FILE'=>$lang['stats_file'],
   'L_STAT_PICTURE'=>$lang['stats_picture'],
   
-  'IMG_REPORT'=>add_session_id($url_img)
+  'IMG_REPORT'=>$url_img
   ));
 
 //---------------------------------------------------------------- log  history
@@ -141,7 +141,7 @@ while ( $row = mysql_fetch_array( $result ) )
       .'&amp;day='.$row['d']
       ;
 
-    $value = '<a href="'.add_session_id($url).'">';
+    $value = '<a href="'.$url.'">';
     $value.= $row['d'].' ('.$week_day.')';
     $value.= "</a>";
   }
@@ -160,7 +160,7 @@ while ( $row = mysql_fetch_array( $result ) )
       .'&amp;month='.$row['m']
       ;
     
-    $value = '<a href="'.add_session_id($url).'">';
+    $value = '<a href="'.$url.'">';
     $value.= $lang['month'][$row['m']].' '.$row['y'];
     $value.= "</a>";
   }
diff --git a/admin/thumbnail.php b/admin/thumbnail.php
index 5193388d7..88ffdc952 100644
--- a/admin/thumbnail.php
+++ b/admin/thumbnail.php
@@ -358,7 +358,7 @@ if (count($remainings) > 0)
   $template->assign_block_vars(
     'params',
     array(
-      'F_ACTION'=>add_session_id($form_url),
+      'F_ACTION'=>$form_url,
       $gdlabel=>'checked="checked"',
       $nlabel=>'checked="checked"',
       'WIDTH_TN'=>$width,
diff --git a/admin/user_list.php b/admin/user_list.php
index f069dfe63..ea1748a2d 100644
--- a/admin/user_list.php
+++ b/admin/user_list.php
@@ -424,7 +424,7 @@ while ($row = mysql_fetch_array($result))
 
 $template->set_filenames(array('user_list'=>'admin/user_list.tpl'));
 
-$base_url = add_session_id(PHPWG_ROOT_PATH.'admin.php?page=user_list');
+$base_url = PHPWG_ROOT_PATH.'admin.php?page=user_list';
 
 if (isset($_GET['start']) and is_numeric($_GET['start']))
 {
@@ -790,8 +790,8 @@ foreach ($page['filtered_users'] as $num => $local_user)
       'CLASS' => ($num % 2 == 1) ? 'row2' : 'row1',
       'ID' => $local_user['id'],
       'CHECKED' => $checked,
-      'U_MOD' => add_session_id($profile_url.$local_user['id']),
-      'U_PERM' => add_session_id($perm_url.$local_user['id']),
+      'U_MOD' => $profile_url.$local_user['id'],
+      'U_PERM' => $perm_url.$local_user['id'],
       'USERNAME' => $local_user['username'],
       'STATUS' => $lang['user_status_'.$local_user['status']],
       'EMAIL' => isset($local_user['email']) ? $local_user['email'] : '',
diff --git a/admin/user_perm.php b/admin/user_perm.php
index 400678ce2..91ade3618 100644
--- a/admin/user_perm.php
+++ b/admin/user_perm.php
@@ -133,11 +133,9 @@ $template->assign_vars(
     'L_CAT_OPTIONS_FALSE'=>$lang['forbidden'],
     
     'F_ACTION' =>
-      add_session_id(
         PHPWG_ROOT_PATH.
         'admin.php?page=user_perm'.
         '&amp;user_id='.$page['user']
-        )
     )
   );
 
diff --git a/admin/waiting.php b/admin/waiting.php
index 7c8e05b51..647fcafe2 100644
--- a/admin/waiting.php
+++ b/admin/waiting.php
@@ -148,7 +148,7 @@ $template->assign_vars(array(
   'L_RESET'=>$lang['reset'],
   'L_DELETE'=>$lang['delete'],
   
-  'F_ACTION'=>add_session_id(str_replace( '&', '&amp;', $_SERVER['REQUEST_URI'] ))
+  'F_ACTION'=>str_replace( '&', '&amp;', $_SERVER['REQUEST_URI'])
   ));
   
 //---------------------------------------------------------------- form display