$fields = array(   'merchant' => '[email protected]',   'customer_email' => '[email protected]',   'address' => '',   'amount' => 0.01000000,   'details' => 'You got Bitcoins!' ); $fields['encrypted'] = strtoupper(hash('sha256', $fields['merchant'] . ':' . $fields['customer_email'] . ':' . $fields['amount'] . ':' . 'API Key'));  $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, 'https://walletbit.com/api'); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, TRUE); curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); curl_setopt($ch, CURLOPT_POST, count($fields)); curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($fields)); $response = curl_exec($ch); curl_close($ch);  if ($response == '1') {  }