ошибка при экспорте БД на денвере.

<?php
/**
* Set of functions used to build dumps of tables as JSON
*
*/
if (! defined('PHPMYADMIN')) {
exit;
}

/**
*
*/
if (isset($plugin_list)) {
$plugin_list['json'] = array(
'text' => 'JSON',
'extension' => 'json',
'mime_type' => 'text/plain',
'options' => array(
array('type' => 'begin_group', 'name' => 'general_opts'),
array(
'type' => 'hidden',
'name' => 'structure_or_data',
),
array('type' => 'end_group')
),
'options_text' => __('Options'),
);
} else {

/**
* Set of functions used to build exports of tables
*/

/**
* Outputs comment
*
* @param string Text of comment
*
* @return bool Whether it suceeded
*/
function PMA_exportComment($text)
{
PMA_exportOutputHandler('/* ' . $text . ' */' . $GLOBALS['crlf']);
return true;
}

/**
* Outputs export footer
*
* @return bool Whether it suceeded
*
* @access public
*/
function PMA_exportFooter()
{
return true;
}

/**
* Outputs export header
*
* @return bool Whether it suceeded
*
* @access public
*/
function PMA_exportHeader()
{
PMA_exportOutputHandler(
'/**' . $GLOBALS['crlf']
. ' Export to JSON plugin for PHPMyAdmin' . $GLOBALS['crlf']
. ' @version 0.1' . $GLOBALS['crlf']
. ' */' . $GLOBALS['crlf'] . $GLOBALS['crlf']
);
return true;
}

/**
* Outputs database header
*
* @param string Database name
*
* @return bool Whether it suceeded
*
* @access public
*/
function PMA_exportDBHeader($db)
{
PMA_exportOutputHandler('/* Database \'' . $db . '\' */ ' . $GLOBALS['crlf'] );
return true;
}

/**
* Outputs database footer
*
* @param string Database name
*
* @return bool Whether it suceeded
*
* @access public
*/
function PMA_exportDBFooter($db)
{
return true;
}

/**
* Outputs create database database
*
* @param string Database name
*
* @return bool Whether it suceeded
*
* @access public
*/
function PMA_exportDBCreate($db)
{
return true;
}

/**
* Outputs the content of a table in YAML format
*
* @param string the database name
* @param string the table name
* @param string the end of line sequence
* @param string the url to go back in case of error
* @param string SQL query for obtaining data
*
* @return bool Whether it suceeded
*
* @access public
*/
function PMA_exportData($db, $table, $crlf, $error_url, $sql_query)
{
$result = PMA_DBI_query($sql_query, null, PMA_DBI_QUERY_UNBUFFERED);

$columns_cnt = PMA_DBI_num_fields($result);
for ($i = 0; $i < $columns_cnt; $i++) {
$columns[$i] = stripslashes(PMA_DBI_field_name($result, $i));
}
unset($i);

$buffer = '';
$record_cnt = 0;
while ($record = PMA_DBI_fetch_row($result)) {

$record_cnt++;

// Output table name as comment if this is the first record of the table
if ($record_cnt == 1) {
$buffer .= '/* ' . $db . '.' . $table . ' */' . $crlf . $crlf;
$buffer .= '[{'; } else {
$buffer .= ', {';
}

for ($i = 0; $i < $columns_cnt; $i++) {

$isLastLine = ($i + 1 >= $columns_cnt);

$column = $columns[$i];

if (is_null($record[$i])) {
$buffer .= '"' . $column . '": null' . (! $isLastLine ? ',' : '');
} elseif (is_numeric($record[$i])) {
$buffer .= '"' . $column . '": ' . $record[$i] . (! $isLastLine ? ',' : '');
} else {
$buffer .= '"' . $column . '": "' . addslashes($record[$i]) . '"' . (! $isLastLine ? ',' : '');
}
}

$buffer .= '}';
}

$buffer .= ']';
if (! PMA_exportOutputHandler($buffer)) {
return FALSE;
}

PMA_DBI_free_result($result);

return true;

wwwwww:
http://www.apachefriends.org/f/viewtopic.php?p=190352&sid=48057447c7a44cbdd2c2ff8fe6a3200a
Видимо проблема с Вашим phpmyadmin и PHP.
Попробуйте установить XAMPP.