Viewing file:  VersionInformation.php (7.15 KB) -rw-r--r--
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<?php
/**
* Responsible for retrieving version information and notifying about latest version
*/
declare(strict_types=1);
namespace PhpMyAdmin;
use PhpMyAdmin\Utils\HttpRequest;
use stdClass;
use const PHP_VERSION;
use function count;
use function explode;
use function intval;
use function is_numeric;
use function is_object;
use function json_decode;
use function preg_match;
use function strlen;
use function strpos;
use function substr;
use function time;
use function version_compare;
/**
* Responsible for retrieving version information and notifying about latest version
*/
class VersionInformation
{
/**
* Returns information with latest version from phpmyadmin.net
*
* @return stdClass|null JSON decoded object with the data
*/
public function getLatestVersion(): ?stdClass
{
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 ?: '{}';
/* 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'] = [
'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 * (int) $parts[0];
}
if (count($parts) >= 2 && is_numeric($parts[1])) {
$result += 10000 * (int) $parts[1];
}
if (count($parts) >= 3 && is_numeric($parts[2])) {
$result += 100 * (int) $parts[2];
}
if (count($parts) >= 4 && is_numeric($parts[3])) {
$result += 1 * (int) $parts[3];
}
if (! empty($suffix)) {
$matches = [];
if (preg_match('/^(\D+)(\d+)$/', $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|null containing the version and date of latest compatible version
*/
public function getLatestCompatibleVersion(array $releases)
{
// Maintains the latest compatible version
$latestRelease = null;
foreach ($releases as $release) {
$phpVersions = $release->php_versions;
$phpConditions = explode(',', $phpVersions);
foreach ($phpConditions as $phpCondition) {
if (! $this->evaluateVersionCondition('PHP', $phpCondition)) {
continue 2;
}
}
// We evaluate MySQL version constraint if there are only
// one server configured.
if (count($GLOBALS['cfg']['Servers']) === 1) {
$mysqlVersions = $release->mysql_versions;
$mysqlConditions = explode(',', $mysqlVersions);
foreach ($mysqlConditions as $mysqlCondition) {
if (! $this->evaluateVersionCondition('MySQL', $mysqlCondition)) {
continue 2;
}
}
}
// To compare the current release with the previous latest release or no release is set
if ($latestRelease !== null && ! version_compare($latestRelease['version'], $release->version, '<')) {
continue;
}
$latestRelease = [
'version' => $release->version,
'date' => $release->date,
];
}
// no compatible version
return $latestRelease;
}
/**
* Checks whether PHP or MySQL version meets supplied version condition
*
* @param string $type PHP or MySQL
* @param string $condition version condition
*
* @return bool whether the condition is met
*/
public function evaluateVersionCondition(string $type, string $condition)
{
$operator = null;
$version = null;
$operators = [
'<=',
'>=',
'!=',
'<>',
'<',
'>',
'=',
]; // preserve order
foreach ($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 && $version !== 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|null MySQL version
*/
protected function getMySQLVersion()
{
global $dbi;
if (isset($dbi)) {
return $dbi->getVersionString();
}
return null;
}
}
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