The bold, is array from $client variable, it's missing the ['client_starting'].
Check your client config settings, where you'll find connection_info_host, connection_info_port, etc, etc.
Trust me it's PHP easy language.
Edit;
Example:
PHP Code:
<?
$client = array();
$client['connection_info_host'] = "127.0.0.1";
$client['connection_info_port'] = "30001";
$client['external_variables_txt'] = "etc";
$client['etx'] = "etc";
$client['etx'] = "etc";
$client['etx'] = "etc";
$client['etx'] = "etc";
?>
This is what is missing:
PHP Code:
<?
$client['client_starting'] = "";
?>