Patch for "master" branch: https://reviews.mahara.org/6843

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https://bugs.launchpad.net/bugs/1613392

Title:
  PostgreSQL insert error into site_content with multibyte language
  packs.

Status in Mahara:
  In Progress

Bug description:
  When we try to add a new institution using Japanese language menu, we
  have an error message "Mahara: Site unavailable A nonrecoverable error
  occurred. This probably means you have encountered a bug in the
  system" and can't add the institution.

  And Apache error log says as below:
  [error] [client xxx.xxx.xxx.xxx] [WAR] 18 (lib/errors.php:820) HINT:  This 
error can also happen if the byte sequence does not match the encoding expected 
by the server, which is controlled by "client_encoding".] in adodb_throw(INSERT 
INTO "site_content" ("name", "content", "ctime", "mtime", "institution") VALUES 
(?, ?, ?, ?, ?), 
home,<h1>Mahara\xe3\x81\xab\xe3\x82\x88\xe3\x81\x86\xe3\x81\x93\xe3\x81\x9d</h1><p>[<b>\xe3\x81\x82\xe3\x81\xaa\xe3\x81\x9f\xe3\x81\xae\xe7\xb5\x84\xe7\xb9\x94\xe5\x90\x8d</b>]\xe3\x81\xaf\xe3\x82\xaa\xe3\x83\xb3\xe3\x83\xa9\xe3\x82\xa4\xe3\x83\xb3\xe3\x82\xb3\xe3\x83\x9f\xe3\x83\xa5\xe3\x83\x8b\xe3\x83\x86\xe3\x82\xa3\xe3\x82\x92\xe6\xa7\x8b\xe7\xaf\x89\xe3\x81\x99\xe3\x82\x8b\xe3\x81\x9f\xe3\x82\x81\xe3\x81\xae\xe5\x8d\x81\xe5\x88\x86\xe3\x81\xaa\xe6\xa9\x9f\xe8\x83\xbd\xe3\x82\x92\xe6\x9c\x89\xe3\x81\x99\xe3\x82\x8b\xe3\x82\xa4\xe3\x83\xb3\xe3\x82\xbf\xe3\x83\xbc\xe3\x83\x8d\xe3\x83\x83\xe3\x83\x88\xe4\xb8\x8a\xe3\x81\xae\xe3\x83\x9d\xe3\x83\xbc\xe3\x83
 
\x88\xe3\x83\x95\xe3\x82\xa9\xe3\x83\xaa\xe3\x82\xaa\xe3\x82\xb7\xe3\x82\xb9\xe3\x83\x86\xe3\x83\xa0\xe3\x81\xa7\xe3\x81\x99\xe3\x80\x82</p><p>Mahara\xe3\x81\xab\xe9\x96\xa2\xe3\x81\x99\xe3\x82\x8b\xe8\xa9\xb3\xe7\xb4\xb0\xe3\x81\xaf<ahref="about.php">About</a>[\xe3\x81\x93\xe3\x81\xae\xe3\x83\x9a\xe3\x83\xbc\xe3\x82\xb8\xe3\x82\x92\xe5\xbf\x98\xe3\x82\x8c\xe3\x81\x9a\xe3\x81\xab\xe7\xb7\xa8\xe9\x9b\x86\xe3\x81\x97\xe3\x81\xa6\xe3\x81\x8f\xe3\x81\xa0\xe3\x81\x95\xe3\x81\x84]\xe3\x82\x92\xe3\x81\x8a\xe8\xaa\xad\xe3\x81\xbf\xe3\x81\x8f\xe3\x81\xa0\xe3\x81\x95\xe3\x81\x84\xe3\x80\x82\xe3\x81\xbe\xe3\x81\x9f\xe3\x80\x81\xe7\xa7\x81\xe3\x81\x9f\xe3\x81\xa1\xe3\x81\xab<ahref="contact.php">\xe3\x81\x8a\xe6\xb0\x97\xe8\xbb\xbd\xe3\x81\xab\xe3\x81\x8a\xe5\x95\x8f\xe3\x81\x84\xe5\x90\x88\xe3\x82\x8f\xe3\x81\x9b\xe3\x81\x8f\xe3\x81\xa0\xe3\x81\x95\xe3\x81\x84</a>\xe3\x80\x82</p><p>\xe3\x81\x82\xe3\x81\xaa\xe3\x81\x9f\xe3\x81\xaf\xe3\x81\x93\xe3\x81\xae\xe3\x83\x86\xe3\x82\xad\xe3\x82\xb9\xe3\x
 
83\x88\xe3\x82\x92\x81\xa7\xe7\xb7\xa8\xe9\x9b\x86\xe3\x81\x99\xe3\x82\x8b\xe3\x81\x93\xe3\x81\xa8\xe3\x81\x8c\xe3\x81\xa7\xe3\x81\x8d\xe3\x81\xbe\xe3\x81\x99\xe3\x80\x82</p>,2016-08-1512:50:39,2016-08-1512:50:39,inst),
 referer: https://mahara.xxxxx.com/admin/users/institutions.php

  To avoid this error, I would like to recommend to modify lib/dml.php
  as below.

  File:
  lib/dml.php

  Line:
  1061

  [ Before ]
    // Pull out data matching these fields
      $ddd = array();
      foreach ($columns as $column) {
          if (isset($data[$column->name])) {
              if ($column->name == $primarykey && empty($setfromseq)) {
                  continue;
              }
              $ddd[$column->name] = $data[$column->name];
          }
      }

  [ After ]
    // Pull out data matching these fields
      $ddd = array();
      foreach ($columns as $column) {
          if (isset($data[$column->name])) {
              if ($column->name == $primarykey && empty($setfromseq)) {
                  continue;
              }
              if (function_exists('mb_convert_encoding')) {
                  $ddd[$column->name] = 
mb_convert_encoding($data[$column->name], "UTF-8", "auto");
              } else {
                  $ddd[$column->name] = $data[$column->name];
             }
          }
      }

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