Here's a super quick take on your request. Call via url with ?coin=ftc for example or change $defaultCoin to the coin you want the last hashrate for.
It's probably easier to ask the dev to include the data in the json output though...
$defaultCoin = 'cnc';
$cryptoCurrencies = array(
'ppc'=>'PPCoin',
'trc'=>'Terracoin',
'frc'=>'Freicoin',
'bbq'=>'BBQCoin',
'nvc'=>'Novacoin',
'ftc'=>'Feathercoin',
'bte'=>'Bytecoin',
'btb'=>'BitBar',
'cnc'=>'CHNCoin',
'jkc'=>'JKC',
'frk'=>'Franko',
'gld'=>'Goldcoin'
);
$baseUrl = 'http://%s.cryptocoinexplorer.com/chain/%s/q/nethash/1/-1';
$coin = (isset($_GET['coin']) && array_key_exists($_GET['coin'], $cryptoCurrencies)) ? $_GET['coin'] : $defaultCoin;
$url = sprintf($baseUrl, $coin, $cryptoCurrencies[$coin]);
$rawdata = file_get_contents($url);
if ($rawdata)
{
if (preg_match("/\n(?P[a-z,]+)\nSTART DATA\n(?P.*?)\n/i", $rawdata, $matches))
{
$headers = explode(',', $matches['headers']);
$data = explode(',', $matches['data']);
$result = array_combine($headers, $data);
echo $result['netHashPerSecond'];
//print_r($result);
}
}
?>