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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Responsible for retrieving version information and notifiying about latest version
*
* @package PhpMyAdmin
*/
namespace PhpMyAdmin;
use PhpMyAdmin\Util;
use PhpMyAdmin\Utils\HttpRequest;
/**
* Responsible for retrieving version information and notifiying about latest version
*
* @package PhpMyAdmin
*
*/
class VersionInformation
{
/**
* Returns information with latest version from phpmyadmin.net
*
* @return object JSON decoded object with the data
*/
public function getLatestVersion()
{
if (!$GLOBALS['cfg']['VersionCheck']) {
return null;
}
// Get response text from phpmyadmin.net or from the session
// Update cache every 6 hours
if (isset($_SESSION['cache']['version_check'])
&& time() < $_SESSION['cache']['version_check']['timestamp'] + 3600 * 6
) {
$save = false;
$response = $_SESSION['cache']['version_check']['response'];
} else {
$save = true;
$file = 'https://www.phpmyadmin.net/home_page/version.json';
$httpRequest = new HttpRequest();
$response = $httpRequest->create($file, 'GET');
}
$response = $response ? $response : '{}';
/* Parse response */
$data = json_decode($response);
/* Basic sanity checking */
if (! is_object($data)
|| empty($data->version)
|| empty($data->releases)
|| empty($data->date)
) {
return null;
}
if ($save) {
$_SESSION['cache']['version_check'] = array(
'response' => $response,
'timestamp' => time()
);
}
return $data;
}
/**
* Calculates numerical equivalent of phpMyAdmin version string
*
* @param string $version version
*
* @return mixed false on failure, integer on success
*/
public function versionToInt($version)
{
$parts = explode('-', $version);
if (count($parts) > 1) {
$suffix = $parts[1];
} else {
$suffix = '';
}
$parts = explode('.', $parts[0]);
$result = 0;
if (count($parts) >= 1 && is_numeric($parts[0])) {
$result += 1000000 * $parts[0];
}
if (count($parts) >= 2 && is_numeric($parts[1])) {
$result += 10000 * $parts[1];
}
if (count($parts) >= 3 && is_numeric($parts[2])) {
$result += 100 * $parts[2];
}
if (count($parts) >= 4 && is_numeric($parts[3])) {
$result += 1 * $parts[3];
}
if (!empty($suffix)) {
$matches = array();
if (preg_match('/^(\D+)(\d+)$/', $suffix, $matches)) {
$suffix = $matches[1];
$result += intval($matches[2]);
}
switch ($suffix) {
case 'pl':
$result += 60;
break;
case 'rc':
$result += 30;
break;
case 'beta':
$result += 20;
break;
case 'alpha':
$result += 10;
break;
case 'dev':
$result += 0;
break;
}
} else {
$result += 50; // for final
}
return $result;
}
/**
* Returns the version and date of the latest phpMyAdmin version compatible
* with the available PHP and MySQL versions
*
* @param array $releases array of information related to each version
*
* @return array containing the version and date of latest compatible version
*/
public function getLatestCompatibleVersion(array $releases)
{
foreach ($releases as $release) {
$phpVersions = $release->php_versions;
$phpConditions = explode(",", $phpVersions);
foreach ($phpConditions as $phpCondition) {
if (! $this->evaluateVersionCondition("PHP", $phpCondition)) {
continue 2;
}
}
// We evalute MySQL version constraint if there are only
// one server configured.
if (count($GLOBALS['cfg']['Servers']) == 1) {
$mysqlVersions = $release->mysql_versions;
$mysqlConditions = explode(",", $mysqlVersions);
foreach ($mysqlConditions as $mysqlCondition) {
if (!$this->evaluateVersionCondition('MySQL', $mysqlCondition)) {
continue 2;
}
}
}
return array(
'version' => $release->version,
'date' => $release->date,
);
}
// no compatible version
return null;
}
/**
* Checks whether PHP or MySQL version meets supplied version condition
*
* @param string $type PHP or MySQL
* @param string $condition version condition
*
* @return boolean whether the condition is met
*/
public function evaluateVersionCondition($type, $condition)
{
$operator = null;
$operators = array("<=", ">=", "!=", "<>", "<", ">", "="); // preserve order
foreach ($operators as $oneOperator) {
if (strpos($condition, $oneOperator) === 0) {
$operator = $oneOperator;
$version = substr($condition, strlen($oneOperator));
break;
}
}
$myVersion = null;
if ($type == 'PHP') {
$myVersion = $this->getPHPVersion();
} elseif ($type == 'MySQL') {
$myVersion = $this->getMySQLVersion();
}
if ($myVersion != null && $operator != null) {
return version_compare($myVersion, $version, $operator);
}
return false;
}
/**
* Returns the PHP version
*
* @return string PHP version
*/
protected function getPHPVersion()
{
return PHP_VERSION;
}
/**
* Returns the MySQL version if connected to a database
*
* @return string MySQL version
*/
protected function getMySQLVersion()
{
if (isset($GLOBALS['dbi'])) {
return $GLOBALS['dbi']->getVersionString();
}
return null;
}
}
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