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admin/phpMyAdmin/libraries/classes/VersionInformation.php
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263
admin/phpMyAdmin/libraries/classes/VersionInformation.php
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<?php
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/**
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* Responsible for retrieving version information and notifying about latest version
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*/
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declare(strict_types=1);
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namespace PhpMyAdmin;
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use PhpMyAdmin\Utils\HttpRequest;
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use stdClass;
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use function count;
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use function explode;
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use function intval;
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use function is_numeric;
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use function is_object;
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use function json_decode;
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use function preg_match;
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use function strlen;
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use function strpos;
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use function substr;
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use function time;
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use function version_compare;
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use const PHP_VERSION;
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/**
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* Responsible for retrieving version information and notifying about latest version
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*/
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class VersionInformation
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{
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/**
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* Returns information with latest version from phpmyadmin.net
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*
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* @return stdClass|null JSON decoded object with the data
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*/
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public function getLatestVersion(): ?stdClass
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{
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if (! $GLOBALS['cfg']['VersionCheck']) {
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return null;
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}
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// Get response text from phpmyadmin.net or from the session
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// Update cache every 6 hours
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if (
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isset($_SESSION['cache']['version_check'])
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&& time() < $_SESSION['cache']['version_check']['timestamp'] + 3600 * 6
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) {
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$save = false;
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$response = $_SESSION['cache']['version_check']['response'];
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} else {
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$save = true;
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$file = 'https://www.phpmyadmin.net/home_page/version.json';
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$httpRequest = new HttpRequest();
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$response = $httpRequest->create($file, 'GET');
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}
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$response = $response ?: '{}';
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/* Parse response */
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$data = json_decode($response);
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/* Basic sanity checking */
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if (! is_object($data) || empty($data->version) || empty($data->releases) || empty($data->date)) {
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return null;
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}
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if ($save) {
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$_SESSION['cache']['version_check'] = [
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'response' => $response,
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'timestamp' => time(),
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];
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}
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return $data;
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}
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/**
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* Calculates numerical equivalent of phpMyAdmin version string
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*
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* @param string $version version
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*
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* @return mixed false on failure, integer on success
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*/
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public function versionToInt($version)
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{
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$parts = explode('-', $version);
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if (count($parts) > 1) {
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$suffix = $parts[1];
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} else {
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$suffix = '';
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}
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$parts = explode('.', $parts[0]);
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$result = 0;
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if (count($parts) >= 1 && is_numeric($parts[0])) {
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$result += 1000000 * (int) $parts[0];
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}
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if (count($parts) >= 2 && is_numeric($parts[1])) {
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$result += 10000 * (int) $parts[1];
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}
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if (count($parts) >= 3 && is_numeric($parts[2])) {
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$result += 100 * (int) $parts[2];
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}
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if (count($parts) >= 4 && is_numeric($parts[3])) {
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$result += 1 * (int) $parts[3];
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}
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if (! empty($suffix)) {
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$matches = [];
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if (preg_match('/^(\D+)(\d+)$/', $suffix, $matches)) {
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$suffix = $matches[1];
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$result += intval($matches[2]);
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}
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switch ($suffix) {
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case 'pl':
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$result += 60;
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break;
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case 'rc':
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$result += 30;
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break;
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case 'beta':
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$result += 20;
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break;
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case 'alpha':
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$result += 10;
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break;
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case 'dev':
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$result += 0;
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break;
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}
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} else {
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$result += 50; // for final
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}
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return $result;
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}
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/**
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* Returns the version and date of the latest phpMyAdmin version compatible
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* with the available PHP and MySQL versions
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*
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* @param array $releases array of information related to each version
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*
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* @return array|null containing the version and date of latest compatible version
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*/
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public function getLatestCompatibleVersion(array $releases)
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{
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// Maintains the latest compatible version
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$latestRelease = null;
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foreach ($releases as $release) {
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// phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
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$phpVersions = $release->php_versions;
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$phpConditions = explode(',', $phpVersions);
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foreach ($phpConditions as $phpCondition) {
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if (! $this->evaluateVersionCondition('PHP', $phpCondition)) {
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continue 2;
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}
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}
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// We evaluate MySQL version constraint if there are only
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// one server configured.
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if (count($GLOBALS['cfg']['Servers']) === 1) {
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// phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
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$mysqlVersions = $release->mysql_versions;
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$mysqlConditions = explode(',', $mysqlVersions);
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foreach ($mysqlConditions as $mysqlCondition) {
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if (! $this->evaluateVersionCondition('MySQL', $mysqlCondition)) {
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continue 2;
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}
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}
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}
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// To compare the current release with the previous latest release or no release is set
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if ($latestRelease !== null && ! version_compare($latestRelease['version'], $release->version, '<')) {
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continue;
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}
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$latestRelease = [
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'version' => $release->version,
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'date' => $release->date,
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];
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}
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// no compatible version
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return $latestRelease;
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}
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/**
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* Checks whether PHP or MySQL version meets supplied version condition
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*
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* @param string $type PHP or MySQL
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* @param string $condition version condition
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*
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* @return bool whether the condition is met
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*/
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public function evaluateVersionCondition(string $type, string $condition)
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{
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$operator = null;
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$version = null;
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$operators = [
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'<=',
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'>=',
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'!=',
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'<>',
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'<',
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'>',
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'=',
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]; // preserve order
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foreach ($operators as $oneOperator) {
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if (strpos($condition, $oneOperator) === 0) {
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$operator = $oneOperator;
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$version = substr($condition, strlen($oneOperator));
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break;
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}
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}
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$myVersion = null;
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if ($type === 'PHP') {
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$myVersion = $this->getPHPVersion();
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} elseif ($type === 'MySQL') {
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$myVersion = $this->getMySQLVersion();
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}
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if ($myVersion !== null && $version !== null && $operator !== null) {
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return version_compare($myVersion, $version, $operator);
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}
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return false;
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}
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/**
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* Returns the PHP version
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*
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* @return string PHP version
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*/
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protected function getPHPVersion()
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{
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return PHP_VERSION;
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}
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/**
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* Returns the MySQL version if connected to a database
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*
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* @return string|null MySQL version
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*/
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protected function getMySQLVersion()
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{
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global $dbi;
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if (isset($dbi)) {
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return $dbi->getVersionString();
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}
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return null;
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}
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}
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