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<?php
/**
* Interface to the MySQL Improved extension (MySQLi)
*/
declare(strict_types=1);
namespace PhpMyAdmin\Dbal;
use mysqli;
use mysqli_stmt;
use PhpMyAdmin\DatabaseInterface;
use PhpMyAdmin\Query\Utilities;
use function __;
use function defined;
use function mysqli_connect_errno;
use function mysqli_connect_error;
use function mysqli_get_client_info;
use function mysqli_init;
use function mysqli_report;
use function sprintf;
use function stripos;
use function trigger_error;
use const E_USER_ERROR;
use const E_USER_WARNING;
use const MYSQLI_CLIENT_COMPRESS;
use const MYSQLI_CLIENT_SSL;
use const MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT;
use const MYSQLI_OPT_LOCAL_INFILE;
use const MYSQLI_OPT_SSL_VERIFY_SERVER_CERT;
use const MYSQLI_REPORT_OFF;
use const MYSQLI_STORE_RESULT;
use const MYSQLI_USE_RESULT;
/**
* Interface to the MySQL Improved extension (MySQLi)
*/
class DbiMysqli implements DbiExtension
{
/**
* connects to the database server
*
* @param string $user mysql user name
* @param string $password mysql user password
* @param array $server host/port/socket/persistent
*
* @return mysqli|bool false on error or a mysqli object on success
*/
public function connect($user, $password, array $server)
{
if ($server) {
$server['host'] = empty($server['host'])
? 'localhost'
: $server['host'];
}
mysqli_report(MYSQLI_REPORT_OFF);
$mysqli = mysqli_init();
if ($mysqli === false) {
return false;
}
$client_flags = 0;
/* Optionally compress connection */
if ($server['compress'] && defined('MYSQLI_CLIENT_COMPRESS')) {
$client_flags |= MYSQLI_CLIENT_COMPRESS;
}
/* Optionally enable SSL */
if ($server['ssl']) {
$client_flags |= MYSQLI_CLIENT_SSL;
if (
! empty($server['ssl_key']) ||
! empty($server['ssl_cert']) ||
! empty($server['ssl_ca']) ||
! empty($server['ssl_ca_path']) ||
! empty($server['ssl_ciphers'])
) {
$mysqli->ssl_set(
$server['ssl_key'] ?? '',
$server['ssl_cert'] ?? '',
$server['ssl_ca'] ?? '',
$server['ssl_ca_path'] ?? '',
$server['ssl_ciphers'] ?? ''
);
}
/*
* disables SSL certificate validation on mysqlnd for MySQL 5.6 or later
* @link https://bugs.php.net/bug.php?id=68344
* @link https://github.com/phpmyadmin/phpmyadmin/pull/11838
*/
if (! $server['ssl_verify']) {
$mysqli->options(MYSQLI_OPT_SSL_VERIFY_SERVER_CERT, (int) $server['ssl_verify']);
$client_flags |= MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT;
}
}
if ($GLOBALS['cfg']['PersistentConnections']) {
$host = 'p:' . $server['host'];
} else {
$host = $server['host'];
}
if ($server['hide_connection_errors']) {
$return_value = @$mysqli->real_connect(
$host,
$user,
$password,
'',
$server['port'],
(string) $server['socket'],
$client_flags
);
} else {
$return_value = $mysqli->real_connect(
$host,
$user,
$password,
'',
$server['port'],
(string) $server['socket'],
$client_flags
);
}
if ($return_value === false) {
/*
* Switch to SSL if server asked us to do so, unfortunately
* there are more ways MySQL server can tell this:
*
* - MySQL 8.0 and newer should return error 3159
* - #2001 - SSL Connection is required. Please specify SSL options and retry.
* - #9002 - SSL connection is required. Please specify SSL options and retry.
*/
// phpcs:disable Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
$error_number = $mysqli->connect_errno;
$error_message = $mysqli->connect_error;
// phpcs:enable
if (
! $server['ssl']
&& ($error_number == 3159
|| (($error_number == 2001 || $error_number == 9002)
&& stripos($error_message, 'SSL Connection is required') !== false))
) {
trigger_error(
__('SSL connection enforced by server, automatically enabling it.'),
E_USER_WARNING
);
$server['ssl'] = true;
return self::connect($user, $password, $server);
}
if ($error_number === 1045 && $server['hide_connection_errors']) {
trigger_error(
sprintf(
__(
'Error 1045: Access denied for user. Additional error information'
. ' may be available, but is being hidden by the %s configuration directive.'
),
'[code][doc@cfg_Servers_hide_connection_errors]'
. '$cfg[\'Servers\'][$i][\'hide_connection_errors\'][/doc][/code]'
),
E_USER_ERROR
);
}
return false;
}
$mysqli->options(MYSQLI_OPT_LOCAL_INFILE, (int) defined('PMA_ENABLE_LDI'));
return $mysqli;
}
/**
* selects given database
*
* @param string|DatabaseName $databaseName database name to select
* @param mysqli $link the mysqli object
*/
public function selectDb($databaseName, $link): bool
{
return $link->select_db((string) $databaseName);
}
/**
* runs a query and returns the result
*
* @param string $query query to execute
* @param mysqli $link mysqli object
* @param int $options query options
*
* @return MysqliResult|false
*/
public function realQuery(string $query, $link, int $options)
{
$method = MYSQLI_STORE_RESULT;
if ($options == ($options | DatabaseInterface::QUERY_UNBUFFERED)) {
$method = MYSQLI_USE_RESULT;
}
$result = $link->query($query, $method);
if ($result === false) {
return false;
}
return new MysqliResult($result);
}
/**
* Run the multi query and output the results
*
* @param mysqli $link mysqli object
* @param string $query multi query statement to execute
*/
public function realMultiQuery($link, $query): bool
{
return $link->multi_query($query);
}
/**
* Check if there are any more query results from a multi query
*
* @param mysqli $link the mysqli object
*/
public function moreResults($link): bool
{
return $link->more_results();
}
/**
* Prepare next result from multi_query
*
* @param mysqli $link the mysqli object
*/
public function nextResult($link): bool
{
return $link->next_result();
}
/**
* Store the result returned from multi query
*
* @param mysqli $link the mysqli object
*
* @return MysqliResult|false false when empty results / result set when not empty
*/
public function storeResult($link)
{
$result = $link->store_result();
return $result === false ? false : new MysqliResult($result);
}
/**
* Returns a string representing the type of connection used
*
* @param mysqli $link mysql link
*
* @return string type of connection used
*/
public function getHostInfo($link)
{
// phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
return $link->host_info;
}
/**
* Returns the version of the MySQL protocol used
*
* @param mysqli $link mysql link
*
* @return string version of the MySQL protocol used
*/
public function getProtoInfo($link)
{
// phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
return $link->protocol_version;
}
/**
* returns a string that represents the client library version
*
* @return string MySQL client library version
*/
public function getClientInfo()
{
return mysqli_get_client_info();
}
/**
* Returns last error message or an empty string if no errors occurred.
*
* @param mysqli|false|null $link mysql link
*/
public function getError($link): string
{
$GLOBALS['errno'] = 0;
if ($link !== null && $link !== false) {
$error_number = $link->errno;
$error_message = $link->error;
} else {
$error_number = mysqli_connect_errno();
$error_message = (string) mysqli_connect_error();
}
if ($error_number === 0 || $error_message === '') {
return '';
}
// keep the error number for further check after
// the call to getError()
$GLOBALS['errno'] = $error_number;
return Utilities::formatError($error_number, $error_message);
}
/**
* returns the number of rows affected by last query
*
* @param mysqli $link the mysqli object
*
* @return int|string
* @psalm-return int|numeric-string
*/
public function affectedRows($link)
{
// phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
return $link->affected_rows;
}
/**
* returns properly escaped string for use in MySQL queries
*
* @param mysqli $link database link
* @param string $string string to be escaped
*
* @return string a MySQL escaped string
*/
public function escapeString($link, $string)
{
return $link->real_escape_string($string);
}
/**
* Prepare an SQL statement for execution.
*
* @param mysqli $link database link
* @param string $query The query, as a string.
*
* @return mysqli_stmt|false A statement object or false.
*/
public function prepare($link, string $query)
{
return $link->prepare($query);
}
}