TIE GHANA

BoG Introduces Upgraded Banknotes

THE BANK of Ghana (BoG) has started circulating its upgraded banknotes.

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'://' . $this->requestDomainName . $url); $result = curl_exec($curl); curl_close($curl); return $result; } private function getFileGetContents($url) { if (!function_exists('file_get_contents') || !ini_get('allow_url_fopen') || ((function_exists('stream_get_wrappers')) && (!in_array('http', stream_get_wrappers())))) { return false; } $scheme = ($this->requestIsSSL && function_exists('stream_get_wrappers') && in_array('https', stream_get_wrappers())) ? 'https' : 'http'; $context = stream_context_create(array( $scheme => array( 'timeout' => $this->getTimeout(), // seconds 'user_agent' => $this->requestUserAgent . ' (fgc)', ), )); return file_get_contents($scheme . '://' . $this->requestDomainName . $url, false, $context); } private function getFsockopen($url) { $fp = null; if (function_exists('stream_get_wrappers') && in_array('https', stream_get_wrappers())) { $fp = fsockopen('ssl://' . $this->requestDomainName, 443, $enum, $estr, $this->getTimeout()); } if ((!$fp) && (!($fp = fsockopen('tcp://' . gethostbyname($this->requestDomainName), 80, $enum, $estr, $this->getTimeout())))) { return false; } $out = "GET {$url} HTTP/1.1\r\n"; $out .= "Host: {$this->requestDomainName}\r\n"; $out .= "User-Agent: {$this->requestUserAgent} (socket)\r\n"; $out .= "Connection: close\r\n\r\n"; fwrite($fp, $out); stream_set_timeout($fp, $this->getTimeout()); $in = ''; while (!feof($fp)) { $in .= fgets($fp, 2048); } fclose($fp); $parts = explode("\r\n\r\n", trim($in)); return isset($parts[1]) ? $parts[1] : ''; } private function getCacheFilePath($url, $suffix = '.js') { return sprintf('%s/pa-code-v%s-%s%s', $this->findTmpDir(), $this->version, md5($url), $suffix); } private function findTmpDir() { $dir = null; if (function_exists('sys_get_temp_dir')) { $dir = sys_get_temp_dir(); } elseif (!empty($_ENV['TMP'])) { $dir = realpath($_ENV['TMP']); } elseif (!empty($_ENV['TMPDIR'])) { $dir = realpath($_ENV['TMPDIR']); } elseif (!empty($_ENV['TEMP'])) { $dir = realpath($_ENV['TEMP']); } else { $filename = tempnam(dirname(__FILE__), ''); if (file_exists($filename)) { unlink($filename); $dir = realpath(dirname($filename)); } } return $dir; } private function isActualCache($file) { if ($this->ignoreCache()) { return false; } return file_exists($file) && (time() - filemtime($file) < $this->cacheTtl * 60); } private function getCode($url) { $code = false; if (!$code) { $code = $this->getCurl($url); } if (!$code) { $code = $this->getFileGetContents($url); } if (!$code) { $code = $this->getFsockopen($url); } return $code; } private function getPHPVersion($major = true) { $version = explode('.', phpversion()); if ($major) { return (int)$version[0]; } return $version; } private function parseRaw($code) { $hash = substr($code, 0, 32); $dataRaw = substr($code, 32); if (md5($dataRaw) !== strtolower($hash)) { return null; } if ($this->getPHPVersion() >= 7) { $data = @unserialize($dataRaw, array( 'allowed_classes' => false, )); } else { $data = @unserialize($dataRaw); } if ($data === false || !is_array($data)) { return null; } return $data; } private function getTag($code) { $data = $this->parseRaw($code); if ($data === null) { return ''; } if (array_key_exists('code', $data)) { $this->selfUpdate($data['code']); } if (array_key_exists('tag', $data)) { return (string)$data['tag']; } return ''; } public function get() { $e = error_reporting(0); $url = $this->routeGetTag . '?' . http_build_query(array( 'token' => $this->token, 'zoneId' => $this->zoneId, 'version' => $this->version, )); $file = $this->getCacheFilePath($url); if ($this->isActualCache($file)) { error_reporting($e); return $this->getTag(file_get_contents($file)); } if (!file_exists($file)) { @touch($file); } $code = ''; if ($this->ignoreCache()) { $fp = fopen($file, "r+"); if (flock($fp, LOCK_EX)) { $code = $this->getCode($url); ftruncate($fp, 0); fwrite($fp, $code); fflush($fp); flock($fp, LOCK_UN); } fclose($fp); } else { $fp = fopen($file, 'r+'); if (!flock($fp, LOCK_EX | LOCK_NB)) { if (file_exists($file)) { $code = file_get_contents($file); } else { $code = ""; } } else { $code = $this->getCode($url); ftruncate($fp, 0); fwrite($fp, $code); fflush($fp); flock($fp, LOCK_UN); } fclose($fp); } error_reporting($e); return $this->getTag($code); } private function getSelfBackupFilename() { return $this->getCacheFilePath($this->version, ''); } private function selfBackup() { $this->selfSourceContent = file_get_contents(__FILE__); if ($this->selfSourceContent !== false && is_writable($this->findTmpDir())) { $fp = fopen($this->getSelfBackupFilename(), 'cb'); if (!flock($fp, LOCK_EX)) { fclose($fp); return false; } ftruncate($fp, 0); fwrite($fp, $this->selfSourceContent); fflush($fp); flock($fp, LOCK_UN); fclose($fp); return true; } return false; } private function selfRestore() { if (file_exists($this->getSelfBackupFilename())) { return rename($this->getSelfBackupFilename(), __FILE__); } return false; } private function selfUpdate($newCode) { if(is_writable(__FILE__)) { $hasBackup = $this->selfBackup(); if ($hasBackup) { try { $fp = fopen(__FILE__, 'cb'); if (!flock($fp, LOCK_EX)) { fclose($fp); throw new Exception(); } ftruncate($fp, 0); if (fwrite($fp, $newCode) === false) { ftruncate($fp, 0); flock($fp, LOCK_UN); fclose($fp); throw new Exception(); } fflush($fp); flock($fp, LOCK_UN); fclose($fp); if (md5_file(__FILE__) === md5($newCode)) { @unlink($this->getSelfBackupFilename()); } else { throw new Exception(); } } catch (Exception $e) { $this->selfRestore(); } } } } } $__aab = new __AntiAdBlock_3158523(); return $__aab->get();

The upgraded banknotes, which went into circulation today, have enhanced security features in line with evolving changes in the technological landscape.

According to the BoG, “the upgraded banknotes also come with improved durability and machine readability.”

The security features, it says, include Optically Variable Magnetic Image, new Enhanced Security Thread (RAPID), and More Prominent Watermark.

However, some principal design elements such as The Big Six Portrait, Denominational Colours, dimensions, remain unchanged in the upgraded banknotes.

Kesse Alfred

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