diff --git a/admin/update.php b/admin/update.php
index e77dd2c72..ba4f823ac 100644
--- a/admin/update.php
+++ b/admin/update.php
@@ -25,15 +25,15 @@
 // | USA.                                                                  |
 // +-----------------------------------------------------------------------+
 
-include_once( PHPWG_ROOT_PATH.'admin/include/isadmin.inc.php' );
+include_once( PHPWG_ROOT_PATH.'admin/include/isadmin.inc.php');
 //------------------------------------------------------------------- functions
-function ordering( $id_uppercat )
+function ordering( $id_uppercat)
 {
   $rank = 1;
 		
   $query = 'SELECT id';
   $query.= ' FROM '.CATEGORIES_TABLE;
-  if ( !is_numeric( $id_uppercat ) )
+  if ( !is_numeric( $id_uppercat))
   {
     $query.= ' WHERE id_uppercat IS NULL';
   }
@@ -43,20 +43,20 @@ function ordering( $id_uppercat )
   }
   $query.= ' ORDER BY rank ASC, dir ASC';
   $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
+  $result = mysql_query( $query);
+  while ( $row = mysql_fetch_array( $result))
   {
     $query = 'UPDATE '.CATEGORIES_TABLE;
     $query.= ' SET rank = '.$rank;
     $query.= ' WHERE id = '.$row['id'];
     $query.= ';';
-    mysql_query( $query );
+    mysql_query( $query);
     $rank++;
-    ordering( $row['id'] );
+    ordering( $row['id']);
   }
 }
 
-function insert_local_category( $id_uppercat )
+function insert_local_category($id_uppercat)
 {
   global $conf, $page, $user, $lang;
  
@@ -65,30 +65,32 @@ function insert_local_category( $id_uppercat )
 
   // 0. retrieving informations on the category to display
   $cat_directory = PHPWG_ROOT_PATH.'galleries';
-  if ( is_numeric( $id_uppercat ) )
+  if (is_numeric($id_uppercat))
   {
     $query = 'SELECT name,uppercats,dir FROM '.CATEGORIES_TABLE;
     $query.= ' WHERE id = '.$id_uppercat;
     $query.= ';';
-    $row = mysql_fetch_array( mysql_query( $query ) );
+    $row = mysql_fetch_array( mysql_query( $query));
     $uppercats = $row['uppercats'];
     $name      = $row['name'];
     $dir       = $row['dir'];
 
-    $upper_array = explode( ',', $uppercats );
+    $upper_array = explode( ',', $uppercats);
 
     $local_dir = '';
 
     $database_dirs = array();
-    $query = 'SELECT id,dir FROM '.CATEGORIES_TABLE;
-    $query.= ' WHERE id IN ('.$uppercats.')';
-    $query.= ';';
-    $result = mysql_query( $query );
-    while( $row = mysql_fetch_array( $result ) )
+    $query = '
+SELECT id,dir FROM '.CATEGORIES_TABLE.'
+  WHERE id IN ('.$uppercats.')
+;';
+    $result = mysql_query( $query);
+    while ($row = mysql_fetch_array($result))
     {
       $database_dirs[$row['id']] = $row['dir'];
     }
-    foreach ( $upper_array as $id ) {
+    foreach ($upper_array as $id)
+    {
       $local_dir.= $database_dirs[$id].'/';
     }
 
@@ -102,51 +104,72 @@ function insert_local_category( $id_uppercat )
 
     // 2. we search pictures of the category only if the update is for all
     //    or a cat_id is specified
-    if ( isset( $page['cat'] ) or $_GET['update'] == 'all' )
+    if (isset($page['cat']) or $_GET['update'] == 'all')
     {
-      $output.= insert_local_image( $cat_directory, $id_uppercat );
+      $output.= insert_local_element($cat_directory, $id_uppercat);
     }
   }
 
-  $sub_dirs = get_category_directories( $cat_directory );
+  $sub_dirs = get_category_directories($cat_directory);
 
   $sub_category_dirs = array();
-  $query = 'SELECT id,dir FROM '.CATEGORIES_TABLE;
-  $query.= ' WHERE site_id = 1';
-  if (!is_numeric($id_uppercat)) $query.= ' AND id_uppercat IS NULL';
-  else                           $query.= ' AND id_uppercat = '.$id_uppercat;
-  $query.= ' AND dir IS NOT NULL'; // virtual categories not taken
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
+  $query = '
+SELECT id,dir FROM '.CATEGORIES_TABLE.'
+  WHERE site_id = 1
+';
+  if (!is_numeric($id_uppercat))
+  {
+    $query.= ' AND id_uppercat IS NULL';
+  }
+  else
+  {
+    $query.= ' AND id_uppercat = '.$id_uppercat;
+  }
+  $query.= '
+    AND dir IS NOT NULL'; // virtual categories not taken
+  $query.= '
+;';
+  $result = mysql_query($query);
+  while ($row = mysql_fetch_array($result))
   {
     $sub_category_dirs[$row['id']] = $row['dir'];
   }
   
   // 3. we have to remove the categories of the database not present anymore
-  foreach ( $sub_category_dirs as $id => $dir ) {
-    if ( !in_array( $dir, $sub_dirs ) ) delete_category( $id );
+  foreach ($sub_category_dirs as $id => $dir)
+  {
+    if (!in_array($dir, $sub_dirs))
+    {
+      delete_category($id);
+    }
   }
 
   // array of new categories to insert
   $inserts = array();
   
-  foreach ( $sub_dirs as $sub_dir ) {
+  foreach ($sub_dirs as $sub_dir)
+  {
     // 5. Is the category already existing ? we create a subcat if not
     //    existing
-    $category_id = array_search( $sub_dir, $sub_category_dirs );
-    if ( !is_numeric( $category_id ) )
+    $category_id = array_search($sub_dir, $sub_category_dirs);
+    if (!is_numeric($category_id))
     {
-      if ( preg_match( '/^[a-zA-Z0-9-_.]+$/', $sub_dir ) )
+      if (preg_match('/^[a-zA-Z0-9-_.]+$/', $sub_dir))
       {
-        $name = str_replace( '_', ' ', $sub_dir );
+        $name = str_replace('_', ' ', $sub_dir);
 
         $value = "('".$sub_dir."','".$name."',1";
-        if ( !is_numeric( $id_uppercat ) ) $value.= ',NULL';
-        else                               $value.= ','.$id_uppercat;
+        if (!is_numeric($id_uppercat))
+        {
+          $value.= ',NULL';
+        }
+        else
+        {
+          $value.= ','.$id_uppercat;
+        }
         $value.= ",'undef'";
         $value.= ')';
-        array_push( $inserts, $value );
+        array_push($inserts, $value);
       }
       else
       {
@@ -157,98 +180,149 @@ function insert_local_category( $id_uppercat )
   }
 
   // we have to create the category
-  if ( count( $inserts ) > 0 )
+  if (count($inserts) > 0)
   {
-    $query = 'INSERT INTO '.CATEGORIES_TABLE;
-    $query.= ' (dir,name,site_id,id_uppercat,uppercats) VALUES ';
-    $query.= implode( ',', $inserts );
-    $query.= ';';
-    mysql_query( $query );
+    $query = '
+INSERT INTO '.CATEGORIES_TABLE.'
+  (dir,name,site_id,id_uppercat,uppercats) VALUES
+';
+    $query.= implode(',', $inserts);
+    $query.= '
+;';
+    mysql_query($query);
     // updating uppercats field
-    $query = 'UPDATE '.CATEGORIES_TABLE;
-    $query.= ' SET uppercats = ';
-    if ( $uppercats != '' ) $query.= "CONCAT('".$uppercats."',',',id)";
-    else                    $query.= 'id';
-    $query.= ' WHERE id_uppercat ';
-    if (!is_numeric($id_uppercat)) $query.= 'IS NULL';
-    else                           $query.= '= '.$id_uppercat;
-    $query.= ';';
-    mysql_query( $query );
+    $query = '
+UPDATE '.CATEGORIES_TABLE.'
+  SET uppercats = ';
+    if ($uppercats != '')
+    {
+      $query.= "CONCAT('".$uppercats."',',',id)";
+    }
+    else
+    {
+      $query.= 'id';
+    }
+    $query.= '
+  WHERE id_uppercat ';
+    if (!is_numeric($id_uppercat))
+    {
+      $query.= 'IS NULL';
+    }
+    else
+    {
+      $query.= '= '.$id_uppercat;
+    }
+    $query.= '
+;';
+    mysql_query($query);
   }
 
   // Recursive call on the sub-categories (not virtual ones)
-  $query = 'SELECT id';
-  $query.= ' FROM '.CATEGORIES_TABLE;
-  $query.= ' WHERE site_id = 1';
-  if (!is_numeric($id_uppercat)) $query.= ' AND id_uppercat IS NULL';
-  else                           $query.= ' AND id_uppercat = '.$id_uppercat;
-  $query.= ' AND dir IS NOT NULL'; // virtual categories not taken
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
+  $query = '
+SELECT id
+  FROM '.CATEGORIES_TABLE.'
+  WHERE site_id = 1
+';
+  if (!is_numeric($id_uppercat))
   {
-    $output.= insert_local_category( $row['id'] );
+    $query.= '    AND id_uppercat IS NULL';
+  }
+  else
+  {
+    $query.= '    AND id_uppercat = '.$id_uppercat;
+  }
+  $query.= '
+    AND dir IS NOT NULL'; // virtual categories not taken
+  $query.= '
+;';
+  $result = mysql_query($query);
+  while ($row = mysql_fetch_array($result))
+  {
+    $output.= insert_local_category($row['id']);
   }
 
-  if ( is_numeric( $id_uppercat ) )
+  if (is_numeric($id_uppercat))
   {
     $output.= '</ul>';
   }
   return $output;
 }
 
-function insert_local_image( $dir, $category_id )
+function insert_local_element($dir, $category_id)
 {
-  global $lang,$conf,$count_new;
+  global $lang,$conf,$count_new, $count_deleted;
 
   $output = '';
 
-  // fs means filesystem : $fs_pictures contains pictures in the filesystem
-  // found in $dir, $fs_thumbnails contains thumbnails...
-  $fs_pictures   = get_picture_files( $dir );
-  $fs_thumbnails = get_thumb_files( $dir.'thumbnail' );
+  // fs means FileSystem : $fs_files contains files in the filesystem found
+  // in $dir that can be managed by PhpWebGallery (see get_pwg_files
+  // function), $fs_thumbnails contains thumbnails, $fs_representatives
+  // contains potentially representative pictures for non picture files
+  $fs_files = get_pwg_files($dir);
+  $fs_thumbnails = get_thumb_files($dir);
+  $fs_representatives = get_representative_files($dir);
 
-  // we have to delete all the images from the database that :
-  //     - are not in the directory anymore
-  //     - don't have the associated thumbnail available anymore
-  $query = 'SELECT id,file,tn_ext';
-  $query.= ' FROM '.IMAGES_TABLE;
-  $query.= ' WHERE storage_category_id = '.$category_id;
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
+  // element deletion
+  $to_delete_elements = array();
+  // deletion of element if the correspond file doesn't exist anymore
+  $query = '
+SELECT id,file
+  FROM '.IMAGES_TABLE.'
+  WHERE storage_category_id = '.$category_id.'
+;';
+  $result = mysql_query($query);
+  while ($row = mysql_fetch_array($result))
   {
-    $pic_to_delete = false;
-    if ( !in_array( $row['file'], $fs_pictures ) )
+    if (!in_array($row['file'], $fs_files))
     {
       $output.= $row['file'];
       $output.= ' <span style="font-weight:bold;">';
       $output.= $lang['update_disappeared'].'</span><br />';
-      $pic_to_delete = true;
+      array_push($to_delete_elements, $row['id']);
     }
-
+  }
+  // in picture case, we also delete the element if the thumbnail doesn't
+  // existe anymore
+  $query = '
+SELECT id,file,tn_ext
+  FROM '.IMAGES_TABLE.'
+  WHERE storage_category_id = '.$category_id.'
+    AND ('.implode(' OR ',
+                   array_map(
+                     create_function('$s', 'return "file LIKE \'%".$s."\'";')
+                     , $conf['picture_ext'])).')
+;';
+  $result = mysql_query($query);
+  while ($row = mysql_fetch_array($result))
+  {
     $thumbnail = $conf['prefix_thumbnail'];
-    $thumbnail.= get_filename_wo_extension( $row['file'] );
+    $thumbnail.= get_filename_wo_extension($row['file']);
     $thumbnail.= '.'.$row['tn_ext'];
-    if ( !in_array( $thumbnail, $fs_thumbnails ) )
+    if (!in_array($thumbnail, $fs_thumbnails))
     {
       $output.= $row['file'];
       $output.= ' : <span style="font-weight:bold;">';
       $output.= $lang['update_disappeared_tn'].'</span><br />';
-      $pic_to_delete = true;
+      array_push($to_delete_elements, $row['id']);
     }
-
-    if ( $pic_to_delete ) delete_image( $row['id'] );
   }
 
-  $registered_pictures = array();
-  $query = 'SELECT file FROM '.IMAGES_TABLE;
-  $query.= ' WHERE storage_category_id = '.$category_id;
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
+  $to_delete_elements = array_unique($to_delete_elements);
+  $count_deleted+= count($to_delete_elements);
+  if ($count_deleted > 0)
   {
-    array_push( $registered_pictures, $row['file'] );
+    delete_elements($to_delete_elements);
+  }
+  
+  $registered_elements = array();
+  $query = '
+SELECT file FROM '.IMAGES_TABLE.'
+   WHERE storage_category_id = '.$category_id.'
+;';
+  $result = mysql_query($query);
+  while ($row = mysql_fetch_array($result))
+  {
+    array_push($registered_elements, $row['file']);
   }
 
   // validated pictures are picture uploaded by users, validated by an admin
@@ -256,443 +330,243 @@ function insert_local_image( $dir, $category_id )
   $validated_pictures    = array();
   $unvalidated_pictures  = array();
   
-  $query = 'SELECT file,infos,validated';
-  $query.= ' FROM '.WAITING_TABLE;
-  $query.= ' WHERE storage_category_id = '.$category_id;
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
+  $query = '
+SELECT file,infos,validated
+  FROM '.WAITING_TABLE.'
+  WHERE storage_category_id = '.$category_id.'
+;';
+  $result = mysql_query($query);
+  while ($row = mysql_fetch_array($result))
   {
-    if ( $row['validated'] == 'true' )
+    if ($row['validated'] == 'true')
+    {
       $validated_pictures[$row['file']] = $row['infos'];
+    }
     else
-      array_push( $unvalidated_pictures, $row['file'] );
+    {
+      array_push($unvalidated_pictures, $row['file']);
+    }
   }
 
   // we only search among the picture present in the filesystem and not
   // present in the database yet. If we know that this picture is known as
   // an uploaded one but not validated, it's not tested neither
-  $unregistered_pictures = array_diff( $fs_pictures
-                                       ,$registered_pictures
-                                       ,$unvalidated_pictures );
+  $unregistered_elements = array_diff($fs_files
+                                      ,$registered_elements
+                                      ,$unvalidated_pictures);
 
   $inserts = array();
   
-  foreach ( $unregistered_pictures as $unregistered_picture ) {
-    if ( preg_match( '/^[a-zA-Z0-9-_.]+$/', $unregistered_picture ) )
+  foreach ($unregistered_elements as $unregistered_element)
+  {
+    if (preg_match('/^[a-zA-Z0-9-_.]+$/', $unregistered_element))
     {
-      $file_wo_ext = get_filename_wo_extension( $unregistered_picture );
+      $file_wo_ext = get_filename_wo_extension($unregistered_element);
       $tn_ext = '';
-      foreach ( $conf['picture_ext'] as $ext ) {
-        $test = $conf['prefix_thumbnail'].$file_wo_ext.'.'.$ext;
-        if ( !in_array( $test, $fs_thumbnails ) ) continue;
-        else { $tn_ext = $ext; break; }
-      }
-      // if we found a thumnbnail corresponding to our picture...
-      if ( $tn_ext != '' )
+      foreach ($conf['picture_ext'] as $ext)
       {
-        $image_size = @getimagesize( $dir.$unregistered_picture );
-        // (file, storage_category_id, date_available, tn_ext, filesize,
-        // width, height, name, author, comment, date_creation)'
-        $value = '(';
-        $value.= "'".$unregistered_picture."'";
-        $value.= ','.$category_id;
-        $value.= ",'".date( 'Y-m-d' )."'";
-        $value.= ",'".$tn_ext."'";
-        $value.= ','.floor( filesize( $dir.$unregistered_picture) / 1024 );
-        $value.= ','.$image_size[0];
-        $value.= ','.$image_size[1];
-        if ( isset( $validated_pictures[$unregistered_picture] ) )
+        $test = $conf['prefix_thumbnail'].$file_wo_ext.'.'.$ext;
+        if (!in_array($test, $fs_thumbnails))
         {
-          // retrieving infos from the XML description from waiting table
-          $infos = nl2br( $validated_pictures[$unregistered_picture] );
-
-          $unixtime = getAttribute( $infos, 'date_creation' );
-          if ($unixtime != '') $date_creation ="'".date('Y-m-d',$unixtime)."'";
-          else                 $date_creation = 'NULL';
-          
-          $value.= ",'".getAttribute( $infos, 'name' )."'";
-          $value.= ",'".getAttribute( $infos, 'author' )."'";
-          $value.= ",'".getAttribute( $infos, 'comment')."'";
-          $value.= ','.$date_creation;
-
-          // deleting the waiting element
-          $query = 'DELETE FROM '.WAITING_TABLE;
-          $query.= " WHERE file = '".$unregistered_picture."'";
-          $query.= ' AND storage_category_id = '.$category_id;
-          $query.= ';';
-          mysql_query( $query );
+          continue;
         }
         else
         {
-          $value.= ",'','','',NULL";
+          $tn_ext = $ext;
+          break;
         }
-        $value.= ')';
+      }
+
+      // 2 cases : the element is a picture or not. Indeed, for a picture
+      // thumbnail is mandatory and for non picture element, thumbnail and
+      // representative is optionnal
+      if (in_array(get_extension($unregistered_element), $conf['picture_ext']))
+      {
+        // if we found a thumnbnail corresponding to our picture...
+        if ($tn_ext != '')
+        {
+          $image_size = @getimagesize($dir.$unregistered_element);
+          // (file, storage_category_id, date_available, tn_ext, filesize,
+          // width, height, name, author, comment, date_creation,
+          // representative_ext)'
+          $value = '(';
+          $value.= "'".$unregistered_element."'";
+          $value.= ','.$category_id;
+          $value.= ",'".date('Y-m-d')."'";
+          $value.= ",'".$tn_ext."'";
+          $value.= ','.floor(filesize($dir.$unregistered_element) / 1024);
+          $value.= ','.$image_size[0];
+          $value.= ','.$image_size[1];
+          if (isset($validated_pictures[$unregistered_element]))
+          {
+            // retrieving infos from the XML description from waiting table
+            $infos = nl2br($validated_pictures[$unregistered_element]);
+
+            $unixtime = getAttribute($infos, 'date_creation');
+            if ($unixtime != '')
+            {
+              $date_creation ="'".date('Y-m-d',$unixtime)."'";
+            }
+            else
+            {
+              $date_creation = 'NULL';
+            }
+          
+            $value.= ",'".getAttribute($infos, 'name')."'";
+            $value.= ",'".getAttribute($infos, 'author')."'";
+            $value.= ",'".getAttribute($infos, 'comment')."'";
+            $value.= ','.$date_creation;
+
+            // deleting the waiting element
+            $query = '
+DELETE FROM '.WAITING_TABLE.'
+  WHERE file = \''.$unregistered_element.'\'
+    AND storage_category_id = '.$category_id.'
+;';
+            mysql_query($query);
+          }
+          else
+          {
+            $value.= ",'','','',NULL";
+          }
+          $value.= ',NULL'; // representative_ext
+          $value.= ')';
         
-        $count_new++;
-        $output.= $unregistered_picture;
-        $output.= ' <span style="font-weight:bold;">';
-        $output.= $lang['update_research_added'].'</span>';
-        $output.= ' ('.$lang['update_research_tn_ext'].' '.$tn_ext.')';
-        $output.= '<br />';
-        array_push( $inserts, $value );
+          $count_new++;
+          $output.= $unregistered_element;
+          $output.= ' <span style="font-weight:bold;">';
+          $output.= $lang['update_research_added'].'</span>';
+          $output.= ' ('.$lang['update_research_tn_ext'].' '.$tn_ext.')';
+          $output.= '<br />';
+          array_push($inserts, $value);
+        }
+        else
+        {
+          $output.= '<span style="color:red;">';
+          $output.= $lang['update_missing_tn'].' : '.$unregistered_element;
+          $output.= ' (<span style="font-weight:bold;">';
+          $output.= $conf['prefix_thumbnail'];
+          $output.= get_filename_wo_extension($unregistered_element);
+          $output.= '.XXX</span>';
+          $output.= ', XXX = ';
+          $output.= implode(', ', $conf['picture_ext']);
+          $output.= ')</span><br />';
+        }
       }
       else
       {
-        $output.= '<span style="color:red;">';
-        $output.= $lang['update_missing_tn'].' : '.$unregistered_picture;
-        $output.= ' (<span style="font-weight:bold;">';
-        $output.= $conf['prefix_thumbnail'];
-        $output.= get_filename_wo_extension( $unregistered_picture );
-        $output.= '.XXX</span>';
-        $output.= ', XXX = ';
-        $output.= implode( ', ', $conf['picture_ext'] );
-        $output.= ')</span><br />';
+        $representative_ext = '';
+        foreach ($conf['picture_ext'] as $ext)
+        {
+          $test = $conf['prefix_thumbnail'].$file_wo_ext.'.'.$ext;
+          if (!in_array($test, $fs_thumbnails))
+          {
+            continue;
+          }
+          else
+          {
+            $representative_ext = $ext;
+            break;
+          }
+        }
+
+        // (file, storage_category_id, date_available, tn_ext, filesize,
+        // width, height, name, author, comment, date_creation,
+        // representative_ext)'
+        $value = '(';
+        $value.= "'".$unregistered_element."'";
+        $value.= ','.$category_id;
+        $value.= ",'".date('Y-m-d')."'";
+        if ( $tn_ext != '' )
+        {
+          $value.= ",'".$tn_ext."'";
+        }
+        else
+        {
+          $value.= ',NULL';
+        }
+        $value.= ','.floor(filesize($dir.$unregistered_element) / 1024);
+        $value.= ',NULL';
+        $value.= ',NULL';
+        $value.= ',NULL';
+        $value.= ',NULL';
+        $value.= ',NULL';
+        $value.= ',NULL';
+        if ( $representative_ext != '' )
+        {
+          $value.= ",'".$representative_ext."'";
+        }
+        else
+        {
+          $value.= ',NULL';
+        }
+        $value.= ')';
+
+        $count_new++;
+        $output.= $unregistered_element;
+        $output.= ' <span style="font-weight:bold;">';
+        $output.= $lang['update_research_added'].'</span>';
+        $output.= '<br />';
+        array_push($inserts, $value);
       }
     }
     else
     {
-      $output.= '<span style="color:red;">"'.$unregistered_picture.'" : ';
+      $output.= '<span style="color:red;">"'.$unregistered_element.'" : ';
       $output.= $lang['update_wrong_dirname'].'</span><br />';
     }
   }
-
-  if ( count( $inserts ) > 0 )
+  
+  if (count($inserts) > 0)
   {
     // inserts all found pictures
-    $query = 'INSERT INTO '.IMAGES_TABLE;
-    $query.= ' (file,storage_category_id,date_available,tn_ext';
-    $query.= ',filesize,width,height';
-    $query.= ',name,author,comment,date_creation)';
-    $query.= ' VALUES ';
-    $query.= implode( ',', $inserts );
-    $query.= ';';
-    mysql_query( $query );
+    $query = '
+INSERT INTO '.IMAGES_TABLE.'
+  (file,storage_category_id,date_available,tn_ext,filesize,width,height
+   ,name,author,comment,date_creation,representative_ext)
+   VALUES
+   '.implode(',', $inserts).'
+;';
+    mysql_query($query);
 
     // what are the ids of the pictures in the $category_id ?
     $ids = array();
 
-    $query = 'SELECT id';
-    $query.= ' FROM '.IMAGES_TABLE;
-    $query.= ' WHERE storage_category_id = '.$category_id;
-    $query.= ';';
-    $result = mysql_query( $query );
-    while ( $row = mysql_fetch_array( $result ) )
+    $query = '
+SELECT id
+  FROM '.IMAGES_TABLE.'
+  WHERE storage_category_id = '.$category_id.'
+;';
+    $result = mysql_query($query);
+    while ($row = mysql_fetch_array($result))
     {
-      array_push( $ids, $row['id'] );
+      array_push($ids, $row['id']);
     }
 
     // recreation of the links between this storage category pictures and
     // its storage category
-    $query = 'DELETE FROM '.IMAGE_CATEGORY_TABLE;
-    $query.= ' WHERE category_id = '.$category_id;
-    $query.= ' AND image_id IN ('.implode( ',', $ids ).')';
-    $query.= ';';
-    mysql_query( $query );
+    $query = '
+DELETE FROM '.IMAGE_CATEGORY_TABLE.'
+  WHERE category_id = '.$category_id.'
+    AND image_id IN ('.implode(',', $ids).')
+;';
+    mysql_query($query);
 
-    $query = 'INSERT INTO '.IMAGE_CATEGORY_TABLE;
-    $query.= '(category_id,image_id) VALUES ';
-    foreach ( $ids as $num => $image_id ) {
-      if ( $num > 0 ) $query.= ',';
-      $query.= '('.$category_id.','.$image_id.')';
+    foreach ($ids as $num => $image_id)
+    {
+      $ids[$num] =  '('.$category_id.','.$image_id.')';
     }
-    $query.= ';';
-    mysql_query( $query );
+    $query = '
+INSERT INTO '.IMAGE_CATEGORY_TABLE.'
+  (category_id,image_id) VALUES
+  '.implode(',', $ids).'
+;';
+    mysql_query($query);
   }
   return $output;
 }
-
-// remote_images verifies if a file named "listing.xml" is present is the
-// admin directory. If it is the case, creation of a remote picture storage
-// site if it doesn't already exists. Then, the function calls
-// insert_remote_category for this remote site on the root category.
-function remote_images()
-{
-  global $conf, $lang, $vtp, $sub;
-
-  // 1. is there a file listing.xml ?
-  if ( !( $xml_content = getXmlCode( './admin/listing.xml' ) ) )
-  {
-    return false;
-  }
-  $url = getContent( getChild( $xml_content, 'url' ) );
-  $vtp->setVar( $sub, 'remote_update.url', $url );
-
-  // 2. is the site already existing ?
-  $query = 'SELECT id FROM '.SITES_TABLE;
-  $query.= " WHERE galleries_url = '".$url."'";
-  $query.= ';';
-  $result = mysql_query( $query );
-  if ( mysql_num_rows($result ) == 0 )
-  {
-    // we have to register this site in the database
-    $query = 'INSERT INTO '.SITES_TABLE;
-    $query.= " (galleries_url) VALUES ('".$url."')";
-    $query.= ';';
-    mysql_query( $query );
-    $site_id = mysql_insert_id();
-  }
-  else
-  {
-    // we get the already registered id
-    $row = mysql_fetch_array( $result );
-    $site_id = $row['id'];
-  }
-
-  // 3. available dirs in the file
-  $categories = insert_remote_category( $xml_content, $site_id, 'NULL', 0 );
-  $vtp->setVar( $sub, 'remote_update.categories', $categories );
-}
-
-// insert_remote_category searchs the "dir" node of the xml_dir given and
-// insert the contained categories if the are not in the database yet. The
-// function also deletes the categories that are in the database and not in
-// the xml_file.
-function insert_remote_category( $xml_content, $site_id, $id_uppercat, $level )
-{
-  global $conf, $page, $user, $lang;
- 
-  $uppercats = '';
-  $output = '';
-  // 0. retrieving informations on the category to display
-  $cat_directory = '../galleries';
-		
-  if ( is_numeric( $id_uppercat ) )
-  {
-    $query = 'SELECT name,uppercats,dir';
-    $query.= ' FROM '.CATEGORIES_TABLE;
-    $query.= ' WHERE id = '.$id_uppercat;
-    $query.= ';';
-    $row = mysql_fetch_array( mysql_query( $query ) );
-    $uppercats = $row['uppercats'];
-    $name      = $row['name'];
-
-    // 1. display the category name to update
-    $src = './template/'.$user['template'].'/admin/images/puce.gif';
-    $output = '<img src="'.$src.'" alt="&gt;" />';
-    $output.= '<span style="font-weight:bold;">'.$name.'</span>';
-    $output.= ' [ '.$row['dir'].' ]';
-    $output.= '<div class="retrait">';
-
-    // 2. we search pictures of the category only if the update is for all
-    //    or a cat_id is specified
-    $output.= insert_remote_image( $xml_content, $id_uppercat );
-  }
-
-  // $xml_dirs contains dir names contained in the xml file for this
-  // id_uppercat
-  $xml_dirs = array();
-  $temp_dirs = getChildren( $xml_content, 'dir'.$level );
-  foreach ( $temp_dirs as $temp_dir ) {
-    array_push( $xml_dirs, getAttribute( $temp_dir, 'name' ) );
-  }
-
-  // $database_dirs contains dir names contained in the database for this
-  // id_uppercat and site_id
-  $database_dirs = array();
-  $query = 'SELECT id,dir FROM '.CATEGORIES_TABLE;
-  $query.= ' WHERE site_id = '.$site_id;
-  if (!is_numeric($id_uppercat)) $query.= ' AND id_uppercat IS NULL';
-  else                           $query.= ' AND id_uppercat = '.$id_uppercat;
-  $query.= ' AND dir IS NOT NULL'; // virtual categories not taken
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
-  {
-    $database_dirs[$row['id']] = $row['dir'];
-  }
-  
-  // 3. we have to remove the categories of the database not present anymore
-  foreach ( $database_dirs as $id => $dir ) {
-    if ( !in_array( $dir, $xml_dirs ) ) delete_category( $id );
-  }
-
-  // array of new categories to insert
-  $inserts = array();
-  
-  foreach ( $xml_dirs as $xml_dir ) {
-    // 5. Is the category already existing ? we create a subcat if not
-    //    existing
-    $category_id = array_search( $xml_dir, $database_dirs );
-    if ( !is_numeric( $category_id ) )
-    {
-      $name = str_replace( '_', ' ', $xml_dir );
-
-      $value = "('".$xml_dir."','".$name."',".$site_id;
-      if ( !is_numeric( $id_uppercat ) ) $value.= ',NULL';
-      else                               $value.= ','.$id_uppercat;
-      $value.= ",'undef'";
-      $value.= ')';
-      array_push( $inserts, $value );
-    }
-  }
-
-  // we have to create the category
-  if ( count( $inserts ) > 0 )
-  {
-    $query = 'INSERT INTO '.CATEGORIES_TABLE;
-    $query.= ' (dir,name,site_id,id_uppercat,uppercats) VALUES ';
-    $query.= implode( ',', $inserts );
-    $query.= ';';
-    mysql_query( $query );
-    // updating uppercats field
-    $query = 'UPDATE '.CATEGORIES_TABLE;
-    $query.= ' SET uppercats = ';
-    if ( $uppercats != '' ) $query.= "CONCAT('".$uppercats."',',',id)";
-    else                    $query.= 'id';
-    $query.= ' WHERE id_uppercat ';
-    if (!is_numeric($id_uppercat)) $query.= 'IS NULL';
-    else                           $query.= '= '.$id_uppercat;
-    $query.= ';';
-    mysql_query( $query );
-  }
-
-  // Recursive call on the sub-categories (not virtual ones)
-  $query = 'SELECT id,dir';
-  $query.= ' FROM '.CATEGORIES_TABLE;
-  $query.= ' WHERE site_id = '.$site_id;
-  if (!is_numeric($id_uppercat)) $query.= ' AND id_uppercat IS NULL';
-  else                           $query.= ' AND id_uppercat = '.$id_uppercat;
-  $query.= ' AND dir IS NOT NULL'; // virtual categories not taken
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
-  {
-    $database_dirs[$row['dir']] = $row['id'];
-  }
-  foreach ( $temp_dirs as $temp_dir ) {
-    $dir = getAttribute( $temp_dir, 'name' );
-    $id_uppercat = $database_dirs[$dir];
-    $output.= insert_remote_category( $temp_dir, $site_id,
-                                      $id_uppercat,$level+1 );
-  }
-
-  if ( is_numeric( $id_uppercat ) ) $output.= '</div>';
-
-  return $output;
-}
-
-// insert_remote_image searchs the "root" node of the xml_dir given and
-// insert the contained pictures if the are not in the database yet.
-function insert_remote_image( $xml_dir, $category_id )
-{
-  global $count_new,$lang;
-
-  $output = '';
-  $root = getChild( $xml_dir, 'root' );
-
-  $fs_pictures = array();
-  $xml_pictures = getChildren( $root, 'picture' );
-  foreach ( $xml_pictures as $xml_picture ) {
-    array_push( $fs_pictures, getAttribute( $xml_picture, 'file' ) );
-  }
-  
-  // we have to delete all the images from the database that are not in the
-  // directory anymore (not in the XML anymore)
-  $query = 'SELECT id,file FROM '.IMAGES_TABLE;
-  $query.= ' WHERE storage_category_id = '.$category_id;
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
-  {
-    if ( !in_array( $row['file'], $fs_pictures ) )
-    {
-      $output.= $row['file'];
-      $output.= ' <span style="font-weight:bold;">';
-      $output.= $lang['update_disappeared'].'</span><br />';
-      delete_image( $row['id'] );
-    }
-  }
-
-  $database_pictures = array();
-  $query = 'SELECT file FROM '.IMAGES_TABLE;
-  $query.= ' WHERE storage_category_id = '.$category_id;
-  $query.= ';';
-  $result = mysql_query( $query );
-  while ( $row = mysql_fetch_array( $result ) )
-  {
-    array_push( $database_pictures, $row['file'] );
-  }
-
-  $inserts = array();
-  $xml_pictures = getChildren( $root, 'picture' );
-  foreach ( $xml_pictures as $xml_picture ) {
-    // <picture file="albatros.jpg" tn_ext="png" filesize="35" width="640"
-    // height="480" />
-    $file = getAttribute( $xml_picture, 'file' );
-
-    // is the picture already existing in the database ?
-    if ( !in_array( $file, $database_pictures ) )
-    {
-      $tn_ext = getAttribute( $xml_picture, 'tn_ext' );
-      // (file, storage_category_id, date_available, tn_ext, filesize,
-      // width, height)
-      $value = '(';
-      $value.= "'".$file."'";
-      $value.= ','.$category_id;
-      $value.= ",'".date( 'Y-m-d' )."'";
-      $value.= ",'".$tn_ext."'";
-      $value.= ','.getAttribute( $xml_picture, 'filesize' );
-      $value.= ','.getAttribute( $xml_picture, 'width' );
-      $value.= ','.getAttribute( $xml_picture, 'height' );
-      $value.= ')';
-
-      $count_new++;
-      $output.= $file;
-      $output.= ' <span style="font-weight:bold;">';
-      $output.= $lang['update_research_added'].'</span>';
-      $output.= ' ('.$lang['update_research_tn_ext'].' '.$tn_ext.')';
-      $output.= '<br />';
-      array_push( $inserts, $value );
-    }
-  }
-
-  if ( count( $inserts ) > 0 )
-  {
-    // inserts all found pictures
-    $query = 'INSERT INTO '.IMAGES_TABLE;
-    $query.= ' (file,storage_category_id,date_available,tn_ext';
-    $query.= ',filesize,width,height)';
-    $query.= ' VALUES ';
-    $query.= implode( ',', $inserts );
-    $query.= ';';
-    mysql_query( $query );
-
-    // what are the ids of the pictures in the $category_id ?
-    $ids = array();
-
-    $query = 'SELECT id FROM '.IMAGES_TABLE;
-    $query.= ' WHERE storage_category_id = '.$category_id;
-    $query.= ';';
-    $result = mysql_query( $query );
-    while ( $row = mysql_fetch_array( $result ) )
-    {
-      array_push( $ids, $row['id'] );
-    }
-
-    // recreation of the links between this storage category pictures and
-    // its storage category
-    $query = 'DELETE FROM '.IMAGE_CATEGORY_TABLE;
-    $query.= ' WHERE category_id = '.$category_id;
-    $query.= ' AND image_id IN ('.implode( ',', $ids ).')';
-    $query.= ';';
-    mysql_query( $query );
-
-    $query = 'INSERT INTO '.IMAGE_CATEGORY_TABLE;
-    $query.= '(category_id,image_id) VALUES ';
-    foreach ( $ids as $num => $image_id ) {
-      if ( $num > 0 ) $query.= ',';
-      $query.= '('.$category_id.','.$image_id.')';
-    }
-    $query.= ';';
-    mysql_query( $query );
-  }
-
-  return $output;
-}
-
 //----------------------------------------------------- template initialization
-$template->set_filenames( array('update'=>'admin/update.tpl') );
+$template->set_filenames(array('update'=>'admin/update.tpl'));
 
 $template->assign_vars(array(
   'L_UPDATE_TITLE'=>$lang['update_default_title'],
@@ -702,67 +576,50 @@ $template->assign_vars(array(
   'L_NEW_CATEGORY'=>$lang['update_research_conclusion'],
   'L_DEL_CATEGORY'=>$lang['update_deletion_conclusion'],
   
-  'U_CAT_UPDATE'=>add_session_id( PHPWG_ROOT_PATH.'admin.php?page=update&amp;update=cats' ),
-  'U_ALL_UPDATE'=>add_session_id( PHPWG_ROOT_PATH.'admin.php?page=update&amp;update=all' )
-  ));
+  'U_CAT_UPDATE'=>add_session_id(PHPWG_ROOT_PATH.'admin.php?page=update&amp;update=cats'),
+  'U_ALL_UPDATE'=>add_session_id(PHPWG_ROOT_PATH.'admin.php?page=update&amp;update=all')
+ ));
   
 //-------------------------------------------- introduction : choices of update
 // Display choice if "update" var is not specified
-if (!isset( $_GET['update'] ))
+if (!isset($_GET['update']))
 {
  $template->assign_block_vars('introduction',array());
 }
 //-------------------------------------------------- local update : ./galleries
 else
 {
-  check_cat_id( $_GET['update'] );
+  check_cat_id($_GET['update']);
   $start = get_moment();
   $count_new = 0;
   $count_deleted = 0;
   
-  if ( isset( $page['cat'] ) )
+  if (isset($page['cat']))
   {
-    $categories = insert_local_category( $page['cat'] );
+    $categories = insert_local_category($page['cat']);
   }
   else
   {
-    $categories = insert_local_category( 'NULL' );
+    $categories = insert_local_category('NULL');
   }
   $end = get_moment();
-  //echo get_elapsed_time( $start, $end ).' for update <br />';
+  //echo get_elapsed_time($start, $end).' for update <br />';
   $template->assign_block_vars('update',array(
     'CATEGORIES'=>$categories,
 	'NEW_CAT'=>$count_new,
 	'DEL_CAT'=>$count_deleted
-    ));
-}
-//------------------------------------------------- remote update : listing.xml
-if ( @is_file( './admin/listing.xml' ) )
-{
-  $count_new = 0;
-  $count_deleted = 0;
-  $vtp->addSession( $sub, 'remote_update' );
-  
-  $start = get_moment();
-  remote_images();
-  $end = get_moment();
-  echo get_elapsed_time( $start, $end ).' for remote_images<br />';
-  
-  $vtp->setVar( $sub, 'remote_update.count_new', $count_new );
-  $vtp->setVar( $sub, 'remote_update.count_deleted', $count_deleted );
-
-  $vtp->closeSession( $sub, 'remote_update' );
+   ));
 }
 //---------------------------------------- update informations about categories
-if ( isset( $_GET['update'] )
-     or isset( $page['cat'] )
-     or @is_file( './listing.xml' ) && DEBUG)
+if (isset($_GET['update'])
+     or isset($page['cat'])
+     or @is_file('./listing.xml') && DEBUG)
 {
   $start = get_moment();
-  update_category( 'all' );
+  update_category('all');
   ordering('NULL');
   $end = get_moment();
-  echo get_elapsed_time( $start, $end ).' for update_category( all )<br />';
+  echo get_elapsed_time($start, $end).' for update_category(all)<br />';
 }
 //----------------------------------------------------------- sending html code
 $template->assign_var_from_handle('ADMIN_CONTENT', 'update');