git-svn-id: http://piwigo.org/svn/trunk@2357 68402e56-0260-453c-a942-63ccdbb3a9ee

1 files changed, 1557 insertions, 0 deletions

diff --git a/BSF/include/functions.inc.php b/BSF/include/functions.inc.php
new file mode 100644
index 000000000..a1b589999
--- /dev/null
+++ b/BSF/include/functions.inc.php
@@ -0,0 +1,1557 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based picture gallery                                  |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008      Piwigo Team                  http://piwigo.org |
+// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
+// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify  |
+// | it under the terms of the GNU General Public License as published by  |
+// | the Free Software Foundation                                          |
+// |                                                                       |
+// | This program is distributed in the hope that it will be useful, but   |
+// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
+// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
+// | General Public License for more details.                              |
+// |                                                                       |
+// | You should have received a copy of the GNU General Public License     |
+// | along with this program; if not, write to the Free Software           |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA.                                                                  |
+// +-----------------------------------------------------------------------+
+
+include_once( PHPWG_ROOT_PATH .'include/functions_user.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_cookie.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_session.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_category.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_xml.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_group.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_html.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_tag.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_url.inc.php' );
+include_once( PHPWG_ROOT_PATH .'include/functions_plugins.inc.php' );
+
+//----------------------------------------------------------- generic functions
+
+/**
+ * returns an array containing the possible values of an enum field
+ *
+ * @param string tablename
+ * @param string fieldname
+ */
+function get_enums($table, $field)
+{
+  // retrieving the properties of the table. Each line represents a field :
+  // columns are 'Field', 'Type'
+  $result = pwg_query('desc '.$table);
+  while ($row = mysql_fetch_array($result))
+  {
+    // we are only interested in the the field given in parameter for the
+    // function
+    if ($row['Field'] == $field)
+    {
+      // retrieving possible values of the enum field
+      // enum('blue','green','black')
+      $options = explode(',', substr($row['Type'], 5, -1));
+      foreach ($options as $i => $option)
+      {
+        $options[$i] = str_replace("'", '',$option);
+      }
+    }
+  }
+  mysql_free_result($result);
+  return $options;
+}
+
+// get_boolean transforms a string to a boolean value. If the string is
+// "false" (case insensitive), then the boolean value false is returned. In
+// any other case, true is returned.
+function get_boolean( $string )
+{
+  $boolean = true;
+  if ( preg_match( '/^false$/i', $string ) )
+  {
+    $boolean = false;
+  }
+  return $boolean;
+}
+
+/**
+ * returns boolean string 'true' or 'false' if the given var is boolean
+ *
+ * @param mixed $var
+ * @return mixed
+ */
+function boolean_to_string($var)
+{
+  if (is_bool($var))
+  {
+    if ($var)
+    {
+      return 'true';
+    }
+    else
+    {
+      return 'false';
+    }
+  }
+  else
+  {
+    return $var;
+  }
+}
+
+// The function get_moment returns a float value coresponding to the number
+// of seconds since the unix epoch (1st January 1970) and the microseconds
+// are precised : e.g. 1052343429.89276600
+function get_moment()
+{
+  $t1 = explode( ' ', microtime() );
+  $t2 = explode( '.', $t1[0] );
+  $t2 = $t1[1].'.'.$t2[1];
+  return $t2;
+}
+
+// The function get_elapsed_time returns the number of seconds (with 3
+// decimals precision) between the start time and the end time given.
+function get_elapsed_time( $start, $end )
+{
+  return number_format( $end - $start, 3, '.', ' ').' s';
+}
+
+// - The replace_space function replaces space and '-' characters
+//   by their HTML equivalent  &nbsb; and &minus;
+// - The function does not replace characters in HTML tags
+// - This function was created because IE5 does not respect the
+//   CSS "white-space: nowrap;" property unless space and minus
+//   characters are replaced like this function does.
+// - Example :
+//                 <div class="foo">My friend</div>
+//               ( 01234567891111111111222222222233 )
+//               (           0123456789012345678901 )
+// becomes :
+//             <div class="foo">My&nbsp;friend</div>
+function replace_space( $string )
+{
+  //return $string;
+  $return_string = '';
+  // $remaining is the rest of the string where to replace spaces characters
+  $remaining = $string;
+  // $start represents the position of the next '<' character
+  // $end   represents the position of the next '>' character
+  $start = 0;
+  $end = 0;
+  $start = strpos ( $remaining, '<' ); // -> 0
+  $end   = strpos ( $remaining, '>' ); // -> 16
+  // as long as a '<' and his friend '>' are found, we loop
+  while ( is_numeric( $start ) and is_numeric( $end ) )
+  {
+    // $treatment is the part of the string to treat
+    // In the first loop of our example, this variable is empty, but in the
+    // second loop, it equals 'My friend'
+    $treatment = substr ( $remaining, 0, $start );
+    // Replacement of ' ' by his equivalent '&nbsp;'
+    $treatment = str_replace( ' ', '&nbsp;', $treatment );
+    $treatment = str_replace( '-', '&minus;', $treatment );
+    // composing the string to return by adding the treated string and the
+    // following HTML tag -> 'My&nbsp;friend</div>'
+    $return_string.= $treatment.substr( $remaining, $start, $end-$start+1 );
+    // the remaining string is deplaced to the part after the '>' of this
+    // loop
+    $remaining = substr ( $remaining, $end + 1, strlen( $remaining ) );
+    $start = strpos ( $remaining, '<' );
+    $end   = strpos ( $remaining, '>' );
+  }
+  $treatment = str_replace( ' ', '&nbsp;', $remaining );
+  $treatment = str_replace( '-', '&minus;', $treatment );
+  $return_string.= $treatment;
+
+  return $return_string;
+}
+
+// get_extension returns the part of the string after the last "."
+function get_extension( $filename )
+{
+  return substr( strrchr( $filename, '.' ), 1, strlen ( $filename ) );
+}
+
+// get_filename_wo_extension returns the part of the string before the last
+// ".".
+// get_filename_wo_extension( 'test.tar.gz' ) -> 'test.tar'
+function get_filename_wo_extension( $filename )
+{
+  $pos = strrpos( $filename, '.' );
+  return ($pos===false) ? $filename : substr( $filename, 0, $pos);
+}
+
+/**
+ * returns an array contening sub-directories, excluding "CVS"
+ *
+ * @param string $dir
+ * @return array
+ */
+function get_dirs($directory)
+{
+  $sub_dirs = array();
+
+  if ($opendir = opendir($directory))
+  {
+    while ($file = readdir($opendir))
+    {
+      if ($file != '.'
+          and $file != '..'
+          and is_dir($directory.'/'.$file)
+          and $file != 'CVS'
+    and $file != '.svn')
+      {
+        array_push($sub_dirs, $file);
+      }
+    }
+  }
+  return $sub_dirs;
+}
+
+/**
+ * returns thumbnail directory name of input diretoty name
+ * make thumbnail directory is necessary
+ * set error messages on array messages
+ *
+ * @param:
+ *  string $dirname
+ *  arrayy $errors
+ * @return bool false on error else string directory name
+ */
+function mkget_thumbnail_dir($dirname, &$errors)
+{
+  $tndir = $dirname.'/thumbnail';
+  if (!is_dir($tndir))
+  {
+    if (!is_writable($dirname))
+    {
+      array_push($errors,
+                 '['.$dirname.'] : '.l10n('no_write_access'));
+      return false;
+    }
+    umask(0000);
+    mkdir($tndir, 0777);
+  }
+
+  return $tndir;
+}
+
+// The get_picture_size function return an array containing :
+//      - $picture_size[0] : final width
+//      - $picture_size[1] : final height
+// The final dimensions are calculated thanks to the original dimensions and
+// the maximum dimensions given in parameters.  get_picture_size respects
+// the width/height ratio
+function get_picture_size( $original_width, $original_height,
+                           $max_width, $max_height )
+{
+  $width = $original_width;
+  $height = $original_height;
+  $is_original_size = true;
+
+  if ( $max_width != "" )
+  {
+    if ( $original_width > $max_width )
+    {
+      $width = $max_width;
+      $height = floor( ( $width * $original_height ) / $original_width );
+    }
+  }
+  if ( $max_height != "" )
+  {
+    if ( $original_height > $max_height )
+    {
+      $height = $max_height;
+      $width = floor( ( $height * $original_width ) / $original_height );
+      $is_original_size = false;
+    }
+  }
+  if ( is_numeric( $max_width ) and is_numeric( $max_height )
+       and $max_width != 0 and $max_height != 0 )
+  {
+    $ratioWidth = $original_width / $max_width;
+    $ratioHeight = $original_height / $max_height;
+    if ( ( $ratioWidth > 1 ) or ( $ratioHeight > 1 ) )
+    {
+      if ( $ratioWidth < $ratioHeight )
+      {
+        $width = floor( $original_width / $ratioHeight );
+        $height = $max_height;
+      }
+      else
+      {
+        $width = $max_width;
+        $height = floor( $original_height / $ratioWidth );
+      }
+      $is_original_size = false;
+    }
+  }
+  $picture_size = array();
+  $picture_size[0] = $width;
+  $picture_size[1] = $height;
+  return $picture_size;
+}
+
+/* Returns true if the string appears to be encoded in UTF-8. (from wordpress)
+ * @param string Str
+ */
+function seems_utf8($Str) { # by bmorel at ssi dot fr
+  for ($i=0; $i<strlen($Str); $i++) {
+    if (ord($Str[$i]) < 0x80) continue; # 0bbbbbbb
+    elseif ((ord($Str[$i]) & 0xE0) == 0xC0) $n=1; # 110bbbbb
+    elseif ((ord($Str[$i]) & 0xF0) == 0xE0) $n=2; # 1110bbbb
+    elseif ((ord($Str[$i]) & 0xF8) == 0xF0) $n=3; # 11110bbb
+    elseif ((ord($Str[$i]) & 0xFC) == 0xF8) $n=4; # 111110bb
+    elseif ((ord($Str[$i]) & 0xFE) == 0xFC) $n=5; # 1111110b
+    else return false; # Does not match any model
+    for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
+      if ((++$i == strlen($Str)) || ((ord($Str[$i]) & 0xC0) != 0x80))
+      return false;
+    }
+  }
+  return true;
+}
+
+/* Remove accents from a UTF-8 or ISO-859-1 string (from wordpress)
+ * @param string sstring - an UTF-8 or ISO-8859-1 string
+ */
+function remove_accents($string)
+{
+  if ( !preg_match('/[\x80-\xff]/', $string) )
+    return $string;
+
+  if (seems_utf8($string)) {
+    $chars = array(
+    // Decompositions for Latin-1 Supplement
+    chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',
+    chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',
+    chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',
+    chr(195).chr(135) => 'C', chr(195).chr(136) => 'E',
+    chr(195).chr(137) => 'E', chr(195).chr(138) => 'E',
+    chr(195).chr(139) => 'E', chr(195).chr(140) => 'I',
+    chr(195).chr(141) => 'I', chr(195).chr(142) => 'I',
+    chr(195).chr(143) => 'I', chr(195).chr(145) => 'N',
+    chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',
+    chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',
+    chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',
+    chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',
+    chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',
+    chr(195).chr(159) => 's', chr(195).chr(160) => 'a',
+    chr(195).chr(161) => 'a', chr(195).chr(162) => 'a',
+    chr(195).chr(163) => 'a', chr(195).chr(164) => 'a',
+    chr(195).chr(165) => 'a', chr(195).chr(167) => 'c',
+    chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',
+    chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',
+    chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',
+    chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',
+    chr(195).chr(177) => 'n', chr(195).chr(178) => 'o',
+    chr(195).chr(179) => 'o', chr(195).chr(180) => 'o',
+    chr(195).chr(181) => 'o', chr(195).chr(182) => 'o',
+    chr(195).chr(182) => 'o', chr(195).chr(185) => 'u',
+    chr(195).chr(186) => 'u', chr(195).chr(187) => 'u',
+    chr(195).chr(188) => 'u', chr(195).chr(189) => 'y',
+    chr(195).chr(191) => 'y',
+    // Decompositions for Latin Extended-A
+    chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',
+    chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',
+    chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',
+    chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',
+    chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',
+    chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',
+    chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',
+    chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',
+    chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',
+    chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',
+    chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',
+    chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',
+    chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',
+    chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',
+    chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',
+    chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',
+    chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',
+    chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',
+    chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',
+    chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',
+    chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',
+    chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',
+    chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',
+    chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',
+    chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',
+    chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',
+    chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',
+    chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',
+    chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',
+    chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',
+    chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',
+    chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',
+    chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',
+    chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',
+    chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',
+    chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',
+    chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',
+    chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',
+    chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',
+    chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',
+    chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',
+    chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',
+    chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',
+    chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',
+    chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',
+    chr(197).chr(154) => 'S',chr(197).chr(155) => 's',
+    chr(197).chr(156) => 'S',chr(197).chr(157) => 's',
+    chr(197).chr(158) => 'S',chr(197).chr(159) => 's',
+    chr(197).chr(160) => 'S', chr(197).chr(161) => 's',
+    chr(197).chr(162) => 'T', chr(197).chr(163) => 't',
+    chr(197).chr(164) => 'T', chr(197).chr(165) => 't',
+    chr(197).chr(166) => 'T', chr(197).chr(167) => 't',
+    chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',
+    chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',
+    chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',
+    chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',
+    chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',
+    chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',
+    chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',
+    chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',
+    chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',
+    chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',
+    chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',
+    chr(197).chr(190) => 'z', chr(197).chr(191) => 's',
+    // Euro Sign
+    chr(226).chr(130).chr(172) => 'E',
+    // GBP (Pound) Sign
+    chr(194).chr(163) => '');
+
+    $string = strtr($string, $chars);
+  } else {
+    // Assume ISO-8859-1 if not UTF-8
+    $chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)
+      .chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)
+      .chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)
+      .chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)
+      .chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)
+      .chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)
+      .chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)
+      .chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)
+      .chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)
+      .chr(252).chr(253).chr(255);
+
+    $chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";
+
+    $string = strtr($string, $chars['in'], $chars['out']);
+    $double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));
+    $double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');
+    $string = str_replace($double_chars['in'], $double_chars['out'], $string);
+  }
+
+  return $string;
+}
+
+/**
+ * simplify a string to insert it into an URL
+ *
+ * @param string
+ * @return string
+ */
+function str2url($str)
+{
+  $str = remove_accents($str);
+  $str = preg_replace('/[^a-z0-9_\s\'\:\/\[\],-]/','',strtolower($str));
+  $str = preg_replace('/[\s\'\:\/\[\],-]+/',' ',trim($str));
+  $res = str_replace(' ','_',$str);
+
+  return $res;
+}
+
+//-------------------------------------------- Piwigo specific functions
+
+/**
+ * returns an array with a list of {language_code => language_name}
+ *
+ * @returns array
+ */
+function get_languages($target_charset = null)
+{
+  if ( empty($target_charset) )
+  {
+    $target_charset = get_pwg_charset();
+  }
+  $target_charset = strtolower($target_charset);
+
+  $dir = opendir(PHPWG_ROOT_PATH.'language');
+  $languages = array();
+
+  while ($file = readdir($dir))
+  {
+    $path = PHPWG_ROOT_PATH.'language/'.$file;
+    if (is_dir($path) and !is_link($path) and file_exists($path.'/iso.txt'))
+    {
+      list($language_name) = @file($path.'/iso.txt');
+
+      $langdef = explode('.',$file);
+      if (count($langdef)>1) // (langCode,encoding)
+      {
+        $langdef[1] = strtolower($langdef[1]);
+
+        if (
+          $target_charset==$langdef[1]
+         or
+          ($target_charset=='utf-8' and $langdef[1]=='iso-8859-1')
+         or
+          ($target_charset=='iso-8859-1' and
+          in_array( substr($langdef[0],2), array('en','fr','de','es','it','nl')))
+        )
+        {
+          $language_name = convert_charset($language_name,
+              $langdef[1], $target_charset);
+          $languages[ $langdef[0] ] = $language_name;
+        }
+        else
+          continue; // the language encoding is not compatible with our charset
+      }
+      else
+      { // UTF-8
+        $language_name = convert_charset($language_name,
+              'utf-8', $target_charset);
+        $languages[$file] = $language_name;
+      }
+    }
+  }
+  closedir($dir);
+  @asort($languages);
+  @reset($languages);
+
+  return $languages;
+}
+
+function pwg_log($image_id = null, $image_type = null)
+{
+  global $conf, $user, $page;
+
+  $do_log = true;
+  if (!$conf['log'])
+  {
+    $do_log = false;
+  }
+  if (is_admin() and !$conf['history_admin'])
+  {
+    $do_log = false;
+  }
+  if (is_a_guest() and !$conf['history_guest'])
+  {
+    $do_log = false;
+  }
+
+  $do_log = trigger_event('pwg_log_allowed', $do_log, $image_id, $image_type);
+
+  if (!$do_log)
+  {
+    return false;
+  }
+
+  $tags_string = null;
+  if (isset($page['section']) and $page['section'] == 'tags')
+  {
+    $tag_ids = array();
+    foreach ($page['tags'] as $tag)
+    {
+      array_push($tag_ids, $tag['id']);
+    }
+
+    $tags_string = implode(',', $tag_ids);
+  }
+
+  $query = '
+INSERT INTO '.HISTORY_TABLE.'
+  (
+    date,
+    time,
+    user_id,
+    IP,
+    section,
+    category_id,
+    image_id,
+    image_type,
+    tag_ids
+  )
+  VALUES
+  (
+    CURDATE(),
+    CURTIME(),
+    '.$user['id'].',
+    \''.$_SERVER['REMOTE_ADDR'].'\',
+    '.(isset($page['section']) ? "'".$page['section']."'" : 'NULL').',
+    '.(isset($page['category']['id']) ? $page['category']['id'] : 'NULL').',
+    '.(isset($image_id) ? $image_id : 'NULL').',
+    '.(isset($image_type) ? "'".$image_type."'" : 'NULL').',
+    '.(isset($tags_string) ? "'".$tags_string."'" : 'NULL').'
+  )
+;';
+  pwg_query($query);
+
+  return true;
+}
+
+// format_date returns a formatted date for display. The date given in
+// argument can be a unixdate (number of seconds since the 01.01.1970) or an
+// american format (2003-09-15). By option, you can show the time. The
+// output is internationalized.
+//
+// format_date( "2003-09-15", 'us', true ) -> "Monday 15 September 2003 21:52"
+function format_date($date, $type = 'us', $show_time = false)
+{
+  global $lang;
+
+  list($year,$month,$day,$hour,$minute,$second) = array(0,0,0,0,0,0);
+
+  switch ( $type )
+  {
+    case 'us' :
+    {
+      list($year,$month,$day) = explode('-', $date);
+      break;
+    }
+    case 'unix' :
+    {
+      list($year,$month,$day,$hour,$minute) =
+        explode('.', date('Y.n.j.G.i', $date));
+      break;
+    }
+    case 'mysql_datetime' :
+    {
+      preg_match('/^(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2})$/',
+                 $date, $out);
+      list($year,$month,$day,$hour,$minute,$second) =
+        array($out[1],$out[2],$out[3],$out[4],$out[5],$out[6]);
+      break;
+    }
+  }
+  $formated_date = '';
+  // before 1970, Microsoft Windows can't mktime
+  if ($year >= 1970)
+  {
+    // we ask midday because Windows think it's prior to midnight with a
+    // zero and refuse to work
+    $formated_date.= $lang['day'][date('w', mktime(12,0,0,$month,$day,$year))];
+  }
+  $formated_date.= ' '.$day;
+  $formated_date.= ' '.$lang['month'][(int)$month];
+  $formated_date.= ' '.$year;
+  if ($show_time)
+  {
+    $formated_date.= ' '.$hour.':'.$minute;
+  }
+
+  return $formated_date;
+}
+
+function pwg_query($query)
+{
+  global $conf,$page,$debug,$t2;
+
+  $start = get_moment();
+  $result = mysql_query($query) or my_error($query."\n");
+
+  $time = get_moment() - $start;
+
+  if (!isset($page['count_queries']))
+  {
+    $page['count_queries'] = 0;
+    $page['queries_time'] = 0;
+  }
+
+  $page['count_queries']++;
+  $page['queries_time']+= $time;
+
+  if ($conf['show_queries'])
+  {
+    $output = '';
+    $output.= '<pre>['.$page['count_queries'].'] ';
+    $output.= "\n".$query;
+    $output.= "\n".'(this query time : ';
+    $output.= '<b>'.number_format($time, 3, '.', ' ').' s)</b>';
+    $output.= "\n".'(total SQL time  : ';
+    $output.= number_format($page['queries_time'], 3, '.', ' ').' s)';
+    $output.= "\n".'(total time      : ';
+    $output.= number_format( ($time+$start-$t2), 3, '.', ' ').' s)';
+    if ( $result!=null and preg_match('/\s*SELECT\s+/i',$query) )
+    {
+      $output.= "\n".'(num rows        : ';
+      $output.= mysql_num_rows($result).' )';
+    }
+    elseif ( $result!=null
+      and preg_match('/\s*INSERT|UPDATE|REPLACE|DELETE\s+/i',$query) )
+    {
+      $output.= "\n".'(affected rows   : ';
+      $output.= mysql_affected_rows().' )';
+    }
+    $output.= "</pre>\n";
+
+    $debug .= $output;
+  }
+
+  return $result;
+}
+
+function pwg_debug( $string )
+{
+  global $debug,$t2,$page;
+
+  $now = explode( ' ', microtime() );
+  $now2 = explode( '.', $now[0] );
+  $now2 = $now[1].'.'.$now2[1];
+  $time = number_format( $now2 - $t2, 3, '.', ' ').' s';
+  $debug .= '<p>';
+  $debug.= '['.$time.', ';
+  $debug.= $page['count_queries'].' queries] : '.$string;
+  $debug.= "</p>\n";
+}
+
+/**
+ * Redirects to the given URL (HTTP method)
+ *
+ * Note : once this function called, the execution doesn't go further
+ * (presence of an exit() instruction.
+ *
+ * @param string $url
+ * @return void
+ */
+function redirect_http( $url )
+{
+  if (ob_get_length () !== FALSE)
+  {
+    ob_clean();
+  }
+  // default url is on html format
+  $url = html_entity_decode($url);
+  header('Request-URI: '.$url);
+  header('Content-Location: '.$url);
+  header('Location: '.$url);
+  exit();
+}
+
+/**
+ * Redirects to the given URL (HTML method)
+ *
+ * Note : once this function called, the execution doesn't go further
+ * (presence of an exit() instruction.
+ *
+ * @param string $url
+ * @param string $title_msg
+ * @param integer $refreh_time
+ * @return void
+ */
+function redirect_html( $url , $msg = '', $refresh_time = 0)
+{
+  global $user, $template, $lang_info, $conf, $lang, $t2, $page, $debug;
+
+  if (!isset($lang_info))
+  {
+    $user = build_user( $conf['guest_id'], true);
+    load_language('common.lang');
+    trigger_action('loading_lang');
+    load_language('local.lang');
+    list($tmpl, $thm) = explode('/', get_default_template());
+    $template = new Template(PHPWG_ROOT_PATH.'template/'.$tmpl, $thm);
+  }
+  else
+  {
+    $template = new Template(PHPWG_ROOT_PATH.'template/'.$user['template'], $user['theme']);
+  }
+
+  if (empty($msg))
+  {
+    $redirect_msg = l10n('redirect_msg');
+  }
+  else
+  {
+    $redirect_msg = $msg;
+  }
+  $redirect_msg = nl2br($redirect_msg);
+
+  $refresh = $refresh_time;
+  $url_link = $url;
+  $title = 'redirection';
+
+  $template->set_filenames( array( 'redirect' => 'redirect.tpl' ) );
+
+  include( PHPWG_ROOT_PATH.'include/page_header.php' );
+
+  $template->set_filenames( array( 'redirect' => 'redirect.tpl' ) );
+  $template->parse('redirect');
+
+  include( PHPWG_ROOT_PATH.'include/page_tail.php' );
+
+  exit();
+}
+
+/**
+ * Redirects to the given URL (Switch to HTTP method or HTML method)
+ *
+ * Note : once this function called, the execution doesn't go further
+ * (presence of an exit() instruction.
+ *
+ * @param string $url
+ * @param string $title_msg
+ * @param integer $refreh_time
+ * @return void
+ */
+function redirect( $url , $msg = '', $refresh_time = 0)
+{
+  global $conf;
+
+  // with RefeshTime <> 0, only html must be used
+  if ($conf['default_redirect_method']=='http'
+      and $refresh_time==0
+      and !headers_sent()
+    )
+  {
+    redirect_http($url);
+  }
+  else
+  {
+    redirect_html($url, $msg, $refresh_time);
+  }
+}
+
+/**
+ * returns $_SERVER['QUERY_STRING'] whitout keys given in parameters
+ *
+ * @param array $rejects
+ * @param boolean $escape - if true escape & to &amp; (for html)
+ * @returns string
+ */
+function get_query_string_diff($rejects=array(), $escape=true)
+{
+  $query_string = '';
+
+  $str = $_SERVER['QUERY_STRING'];
+  parse_str($str, $vars);
+
+  $is_first = true;
+  foreach ($vars as $key => $value)
+  {
+    if (!in_array($key, $rejects))
+    {
+      $query_string.= $is_first ? '?' : ($escape ? '&amp;' : '&' );
+      $is_first = false;
+      $query_string.= $key.'='.$value;
+    }
+  }
+
+  return $query_string;
+}
+
+function url_is_remote($url)
+{
+  if ( strncmp($url, 'http://', 7)==0
+    or strncmp($url, 'https://', 8)==0 )
+  {
+    return true;
+  }
+  return false;
+}
+
+/**
+ * returns available template/theme
+ */
+function get_pwg_themes()
+{
+  global $conf;
+  $themes = array();
+
+  $template_dir = PHPWG_ROOT_PATH.'template';
+
+  foreach (get_dirs($template_dir) as $template)
+  {
+    foreach (get_dirs($template_dir.'/'.$template.'/theme') as $theme)
+    {
+      if ( ($template.'/'.$theme) != $conf['admin_layout'] )
+      array_push($themes, $template.'/'.$theme);
+    }
+  }
+
+  return $themes;
+}
+
+/* Returns the PATH to the thumbnail to be displayed. If the element does not
+ * have a thumbnail, the default mime image path is returned. The PATH can be
+ * used in the php script, but not sent to the browser.
+ * @param array element_info assoc array containing element info from db
+ * at least 'path', 'tn_ext' and 'id' should be present
+ */
+function get_thumbnail_path($element_info)
+{
+  $path = get_thumbnail_location($element_info);
+  if ( !url_is_remote($path) )
+  {
+    $path = PHPWG_ROOT_PATH.$path;
+  }
+  return $path;
+}
+
+/* Returns the URL of the thumbnail to be displayed. If the element does not
+ * have a thumbnail, the default mime image url is returned. The URL can be
+ * sent to the browser, but not used in the php script.
+ * @param array element_info assoc array containing element info from db
+ * at least 'path', 'tn_ext' and 'id' should be present
+ */
+function get_thumbnail_url($element_info)
+{
+  $path = get_thumbnail_location($element_info);
+  if ( !url_is_remote($path) )
+  {
+    $path = embellish_url(get_root_url().$path);
+  }
+
+  // plugins want another url ?
+  $path = trigger_event('get_thumbnail_url', $path, $element_info);
+  return $path;
+}
+
+/* returns the relative path of the thumnail with regards to to the root
+of piwigo (not the current page!).This function is not intended to be
+called directly from code.*/
+function get_thumbnail_location($element_info)
+{
+  global $conf;
+  if ( !empty( $element_info['tn_ext'] ) )
+  {
+    $path = substr_replace(
+      get_filename_wo_extension($element_info['path']),
+      '/thumbnail/'.$conf['prefix_thumbnail'],
+      strrpos($element_info['path'],'/'),
+      1
+      );
+    $path.= '.'.$element_info['tn_ext'];
+  }
+  else
+  {
+    $path = get_themeconf('mime_icon_dir')
+        .strtolower(get_extension($element_info['path'])).'.png';
+  }
+
+  // plugins want another location ?
+  $path = trigger_event( 'get_thumbnail_location', $path, $element_info);
+  return $path;
+}
+
+/* returns the title of the thumnail */
+function get_thumbnail_title($element_info)
+{
+  // message in title for the thumbnail
+  if (isset($element_info['file']))
+  {
+    $thumbnail_title = $element_info['file'];
+  }
+  else
+  {
+    $thumbnail_title = '';
+  }
+
+  if (!empty($element_info['filesize']))
+  {
+    $thumbnail_title .= ' : '.l10n_dec('%d Kb', '%d Kb', $element_info['filesize']);
+  }
+
+  return $thumbnail_title;
+}
+
+// my_error returns (or send to standard output) the message concerning the
+// error occured for the last mysql query.
+function my_error($header)
+{
+  global $conf;
+
+  $error = '<pre>';
+  $error.= $header;
+  $error.= '[mysql error '.mysql_errno().'] ';
+  $error.= mysql_error();
+  $error.= '</pre>';
+
+  if ($conf['die_on_sql_error'])
+  {
+    die($error);
+  }
+  else
+  {
+    echo $error;
+  }
+}
+
+/**
+ * creates an array based on a query, this function is a very common pattern
+ * used here
+ *
+ * @param string $query
+ * @param string $fieldname
+ * @return array
+ */
+function array_from_query($query, $fieldname)
+{
+  $array = array();
+
+  $result = pwg_query($query);
+  while ($row = mysql_fetch_array($result))
+  {
+    array_push($array, $row[$fieldname]);
+  }
+
+  return $array;
+}
+
+/**
+ * fill the current user caddie with given elements, if not already in
+ * caddie
+ *
+ * @param array elements_id
+ */
+function fill_caddie($elements_id)
+{
+  global $user;
+
+  include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
+
+  $query = '
+SELECT element_id
+  FROM '.CADDIE_TABLE.'
+  WHERE user_id = '.$user['id'].'
+;';
+  $in_caddie = array_from_query($query, 'element_id');
+
+  $caddiables = array_diff($elements_id, $in_caddie);
+
+  $datas = array();
+
+  foreach ($caddiables as $caddiable)
+  {
+    array_push($datas, array('element_id' => $caddiable,
+                             'user_id' => $user['id']));
+  }
+
+  if (count($caddiables) > 0)
+  {
+    mass_inserts(CADDIE_TABLE, array('element_id','user_id'), $datas);
+  }
+}
+
+/**
+ * returns the element name from its filename
+ *
+ * @param string filename
+ * @return string name
+ */
+function get_name_from_file($filename)
+{
+  return str_replace('_',' ',get_filename_wo_extension($filename));
+}
+
+/**
+ * returns the corresponding value from $lang if existing. Else, the key is
+ * returned
+ *
+ * @param string key
+ * @return string
+ */
+function l10n($key)
+{
+  global $lang, $conf;
+
+  if ($conf['debug_l10n'] and !isset($lang[$key]) and !empty($key))
+  {
+    trigger_error('[l10n] language key "'.$key.'" is not defined', E_USER_NOTICE);
+  }
+
+  return isset($lang[$key]) ? $lang[$key] : $key;
+}
+
+/**
+ * returns the prinft value for strings including %d
+ * return is concorded with decimal value (singular, plural)
+ *
+ * @param singular string key
+ * @param plural string key
+ * @param decimal value
+ * @return string
+ */
+function l10n_dec($singular_fmt_key, $plural_fmt_key, $decimal)
+{
+  global $lang_info;
+
+  return
+    sprintf(
+      l10n((
+        (($decimal > 1) or ($decimal == 0 and $lang_info['zero_plural']))
+          ? $plural_fmt_key
+          : $singular_fmt_key
+        )), $decimal);
+}
+/*
+ * returns a single element to use with l10n_args
+ *
+ * @param string key: translation key
+ * @param array/string/../number args:
+ *   arguments to use on sprintf($key, args)
+ *   if args is a array, each values are used on sprintf
+ * @return string
+ */
+function get_l10n_args($key, $args)
+{
+  if (is_array($args))
+  {
+    $key_arg = array_merge(array($key), $args);
+  }
+  else
+  {
+    $key_arg = array($key,  $args);
+  }
+  return array('key_args' => $key_arg);
+}
+
+/*
+ * returns a string with formated with l10n_args elements
+ *
+ * @param element/array $key_args: element or array of l10n_args elements
+ * @param $sep: if $key_args is array,
+ *   separator is used when translated l10n_args elements are concated
+ * @return string
+ */
+function l10n_args($key_args, $sep = "\n")
+{
+  if (is_array($key_args))
+  {
+    foreach ($key_args as $key => $element)
+    {
+      if (isset($result))
+      {
+        $result .= $sep;
+      }
+      else
+      {
+        $result = '';
+      }
+
+      if ($key === 'key_args')
+      {
+        array_unshift($element, l10n(array_shift($element)));
+        $result .= call_user_func_array('sprintf', $element);
+      }
+      else
+      {
+        $result .= l10n_args($element, $sep);
+      }
+    }
+  }
+  else
+  {
+    die('l10n_args: Invalid arguments');
+  }
+
+  return $result;
+}
+
+/**
+ * returns the corresponding value from $themeconf if existing. Else, the
+ * key is returned
+ *
+ * @param string key
+ * @return string
+ */
+function get_themeconf($key)
+{
+  global $template;
+
+  return $template->get_themeconf($key);
+}
+
+/**
+ * Returns webmaster mail address depending on $conf['webmaster_id']
+ *
+ * @return string
+ */
+function get_webmaster_mail_address()
+{
+  global $conf;
+
+  $query = '
+SELECT '.$conf['user_fields']['email'].'
+  FROM '.USERS_TABLE.'
+  WHERE '.$conf['user_fields']['id'].' = '.$conf['webmaster_id'].'
+;';
+  list($email) = mysql_fetch_array(pwg_query($query));
+
+  return $email;
+}
+
+/**
+ * which upgrades are available ?
+ *
+ * @return array
+ */
+function get_available_upgrade_ids()
+{
+  $upgrades_path = PHPWG_ROOT_PATH.'install/db';
+
+  $available_upgrade_ids = array();
+
+  if ($contents = opendir($upgrades_path))
+  {
+    while (($node = readdir($contents)) !== false)
+    {
+      if (is_file($upgrades_path.'/'.$node)
+          and preg_match('/^(.*?)-database\.php$/', $node, $match))
+      {
+        array_push($available_upgrade_ids, $match[1]);
+      }
+    }
+  }
+  natcasesort($available_upgrade_ids);
+
+  return $available_upgrade_ids;
+}
+
+/**
+ * Add configuration parameters from database to global $conf array
+ *
+ * @return void
+ */
+function load_conf_from_db($condition = '')
+{
+  global $conf;
+
+  $query = '
+SELECT param, value
+ FROM '.CONFIG_TABLE.'
+ '.(!empty($condition) ? 'WHERE '.$condition : '').'
+;';
+  $result = pwg_query($query);
+
+  if ((mysql_num_rows($result) == 0) and !empty($condition))
+  {
+    die('No configuration data');
+  }
+
+  while ($row = mysql_fetch_array($result))
+  {
+    $conf[ $row['param'] ] = isset($row['value']) ? $row['value'] : '';
+
+    // If the field is true or false, the variable is transformed into a
+    // boolean value.
+    if ($conf[$row['param']] == 'true' or $conf[$row['param']] == 'false')
+    {
+      $conf[ $row['param'] ] = get_boolean($conf[ $row['param'] ]);
+    }
+  }
+}
+
+/**
+ * Prepends and appends a string at each value of the given array.
+ *
+ * @param array
+ * @param string prefix to each array values
+ * @param string suffix to each array values
+ */
+function prepend_append_array_items($array, $prepend_str, $append_str)
+{
+  array_walk(
+    $array,
+    create_function('&$s', '$s = "'.$prepend_str.'".$s."'.$append_str.'";')
+    );
+
+  return $array;
+}
+
+/**
+ * creates an hashed based on a query, this function is a very common
+ * pattern used here. Among the selected columns fetched, choose one to be
+ * the key, another one to be the value.
+ *
+ * @param string $query
+ * @param string $keyname
+ * @param string $valuename
+ * @return array
+ */
+function simple_hash_from_query($query, $keyname, $valuename)
+{
+  $array = array();
+
+  $result = pwg_query($query);
+  while ($row = mysql_fetch_array($result))
+  {
+    $array[ $row[$keyname] ] = $row[$valuename];
+  }
+
+  return $array;
+}
+
+/**
+ * creates an hashed based on a query, this function is a very common
+ * pattern used here. The key is given as parameter, the value is an associative
+ * array.
+ *
+ * @param string $query
+ * @param string $keyname
+ * @return array
+ */
+function hash_from_query($query, $keyname)
+{
+  $array = array();
+  $result = pwg_query($query);
+  while ($row = mysql_fetch_assoc($result))
+  {
+    $array[ $row[$keyname] ] = $row;
+  }
+  return $array;
+}
+
+/**
+ * Return basename of the current script
+ * Lower case convertion is applied on return value
+ * Return value is without file extention ".php"
+ *
+ * @param void
+ *
+ * @return script basename
+ */
+function script_basename()
+{
+  global $conf;
+
+  foreach (array('SCRIPT_NAME', 'SCRIPT_FILENAME', 'PHP_SELF') as $value)
+  {
+    $continue = !empty($_SERVER[$value]);
+    if ($continue)
+    {
+      $filename = strtolower($_SERVER[$value]);
+
+      if ($conf['php_extension_in_urls'])
+      {
+        $continue = get_extension($filename) ===  'php';
+      }
+
+      if ($continue)
+      {
+        $basename = basename($filename, '.php');
+        $continue = !empty($basename);
+      }
+
+      if ($continue)
+      {
+        return $basename;
+      }
+    }
+  }
+
+  return '';
+}
+
+/**
+ * Return value for the current page define on $conf['filter_pages']
+ * Îf value is not defined, default value are returned
+ *
+ * @param value name
+ *
+ * @return filter page value
+ */
+function get_filter_page_value($value_name)
+{
+  global $conf;
+
+  $page_name = script_basename();
+
+  if (isset($conf['filter_pages'][$page_name][$value_name]))
+  {
+    return $conf['filter_pages'][$page_name][$value_name];
+  }
+  else if (isset($conf['filter_pages']['default'][$value_name]))
+  {
+    return $conf['filter_pages']['default'][$value_name];
+  }
+  else
+  {
+    return null;
+  }
+}
+
+/**
+ * returns the character set of data sent to browsers / received from forms
+ */
+function get_pwg_charset()
+{
+  defined('PWG_CHARSET') or die('load_language PWG_CHARSET undefined');
+  return PWG_CHARSET;
+}
+
+/**
+ * includes a language file or returns the content of a language file
+ * availability of the file
+ *
+ * in descending order of preference:
+ *   param language, user language, default language
+ * Piwigo default language.
+ *
+ * @param string filename
+ * @param string dirname
+ * @param string language
+ * @param bool return_content - if true the file content is returned otherwise
+ *  the file is evaluated as php
+ * @return boolean success status or a string if return_content is true
+ */
+function load_language($filename, $dirname = '', $language = '',
+    $return_content=false, $target_charset=null)
+{
+  global $user;
+
+  if (!$return_content)
+  {
+    $filename .= '.php'; //MAYBE to do .. load .po and .mo localization files
+  }
+  if (empty($dirname))
+  {
+    $dirname = PHPWG_ROOT_PATH;
+  }
+  $dirname .= 'language/';
+
+  $languages = array();
+  if ( !empty($language) )
+  {
+    $languages[] = $language;
+  }
+  if ( !empty($user['language']) )
+  {
+    $languages[] = $user['language'];
+  }
+  if ( defined('PHPWG_INSTALLED') )
+  {
+    $languages[] = get_default_language();
+  }
+  $languages[] = PHPWG_DEFAULT_LANGUAGE;
+  $languages = array_unique($languages);
+
+  if ( empty($target_charset) )
+  {
+    $target_charset = get_pwg_charset();
+  }
+  $target_charset = strtolower($target_charset);
+  $source_charset = '';
+  $source_file    = '';
+  foreach ($languages as $language)
+  {
+    $dir = $dirname.$language;
+
+    // exact charset match - no conversion required
+    $f = $dir.'.'.$target_charset.'/'.$filename;
+    if (file_exists($f))
+    {
+      $source_file = $f;
+      break;
+    }
+
+    // UTF-8 ?
+    $f = $dir.'/'.$filename;
+    if (file_exists($f))
+    {
+      $source_charset = 'utf-8';
+      $source_file = $f;
+      break;
+    }
+
+    if ($target_charset=='utf-8')
+    { // we accept conversion from ISO-8859-1 to UTF-8
+      $f = $dir.'.iso-8859-1/'.$filename;
+      if (file_exists($f))
+      {
+        $source_charset = 'iso-8859-1';
+        $source_file = $f;
+        break;
+      }
+    }
+  }
+
+  if ( !empty($source_file) )
+  {
+    if (!$return_content)
+    {
+      @include($source_file);
+      $load_lang = @$lang;
+      $load_lang_info = @$lang_info;
+
+      global $lang, $lang_info;
+      if ( !isset($lang) ) $lang=array();
+      if ( !isset($lang_info) ) $lang_info=array();
+
+      if ( !empty($source_charset) and $source_charset!=$target_charset)
+      {
+        if ( is_array($load_lang) )
+        {
+          foreach ($load_lang as $k => $v)
+          {
+            if ( is_array($v) )
+            {
+              $func = create_function('$v', 'return convert_charset($v, "'.$source_charset.'","'.$target_charset.'");' );
+              $lang[$k] = array_map($func, $v);
+            }
+            else
+              $lang[$k] = convert_charset($v, $source_charset, $target_charset);
+          }
+        }
+        if ( is_array($load_lang_info) )
+        {
+          foreach ($load_lang_info as $k => $v)
+          {
+            $lang_info[$k] = convert_charset($v, $source_charset, $target_charset);
+          }
+        }
+      }
+      else
+      {
+        $lang = array_merge( $lang, (array)$load_lang );
+        $lang_info = array_merge( $lang_info, (array)$load_lang_info );
+      }
+      return true;
+    }
+    else
+    {
+      $content = @file_get_contents($source_file);
+      if ( !empty($source_charset) and $source_charset!=$target_charset)
+      {
+        $content = convert_charset($content, $source_charset, $target_charset);
+      }
+      return $content;
+    }
+  }
+  return false;
+}
+
+/**
+ * converts a string from a character set to another character set
+ * @param string str the string to be converted
+ * @param string source_charset the character set in which the string is encoded
+ * @param string dest_charset the destination character set
+ */
+function convert_charset($str, $source_charset, $dest_charset)
+{
+  if ($source_charset==$dest_charset)
+    return $str;
+  if ($source_charset=='iso-8859-1' and $dest_charset=='utf-8')
+  {
+    return utf8_encode($str);
+  }
+  if ($source_charset=='utf-8' and $dest_charset=='iso-8859-1')
+  {
+    return utf8_decode($str);
+  }
+  if (function_exists('iconv'))
+  {
+    return iconv($source_charset, $dest_charset, $str);
+  }
+  if (function_exists('mb_convert_encoding'))
+  {
+    return mb_convert_encoding( $str, $dest_charset, $source_charset );
+  }
+  return $str; //???
+}
+?>
\ No newline at end of file