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<?php
/**
* Lightweight abstraction layer for common simple database routines
*
* Standard: PSR-2
* @link http://www.php-fig.org/psr/psr-2
*
* @package Duplicator
* @subpackage classes/utilities
* @copyright (c) 2017, Snapcreek LLC
* @since 1.1.32
*
*/
// Exit if accessed directly
if (!defined('DUPLICATOR_VERSION')) {
exit;
}
class DUP_DB extends wpdb
{
public static $remove_placeholder_escape_exists = null;
public static function init()
{
global $wpdb;
self::$remove_placeholder_escape_exists = method_exists($wpdb, 'remove_placeholder_escape');
}
/**
* Get the requested MySQL system variable
*
* @param string $name The database variable name to lookup
*
* @return string the server variable to query for
*/
public static function getVariable($name)
{
global $wpdb;
if (strlen($name)) {
$row = $wpdb->get_row("SHOW VARIABLES LIKE '{$name}'", ARRAY_N);
return isset($row[1]) ? $row[1] : null;
} else {
return null;
}
}
/**
* Gets the MySQL database version number
*
* @param bool $full True: Gets the full version
* False: Gets only the numeric portion i.e. 5.5.6 or 10.1.2 (for MariaDB)
*
* @return false|string 0 on failure, version number on success
*/
public static function getVersion($full = false)
{
global $wpdb;
if ($full) {
$version = self::getVariable('version');
} else {
$version = preg_replace('/[^0-9.].*/', '', self::getVariable('version'));
}
//Fall-back for servers that have restricted SQL for SHOW statement
if (empty($version)) {
$version = $wpdb->db_version();
}
return empty($version) ? 0 : $version;
}
/**
* Try to return the mysqldump path on Windows servers
*
* @return boolean|string
*/
public static function getWindowsMySqlDumpRealPath()
{
try {
if (function_exists('php_ini_loaded_file')) {
$get_php_ini_path = php_ini_loaded_file();
if (@file_exists($get_php_ini_path)) {
$search = array(
dirname(dirname($get_php_ini_path)).'/mysql/bin/mysqldump.exe',
dirname(dirname(dirname($get_php_ini_path))).'/mysql/bin/mysqldump.exe',
dirname(dirname($get_php_ini_path)).'/mysql/bin/mysqldump',
dirname(dirname(dirname($get_php_ini_path))).'/mysql/bin/mysqldump',
);
foreach ($search as $mysqldump) {
if (@file_exists($mysqldump)) {
return str_replace("\\", "/", $mysqldump);
}
}
}
}
unset($search);
unset($get_php_ini_path);
return false;
} catch(Exception $ex) {
return false;
}
}
/**
* Returns the mysqldump path if the server is enabled to execute it otherwise false
*
* @return boolean|string
*/
public static function getMySqlDumpPath()
{
//Is shell_exec possible
if (!DUP_Util::hasShellExec()) {
return false;
}
$custom_mysqldump_path = DUP_Settings::Get('package_mysqldump_path');
$custom_mysqldump_path = (strlen($custom_mysqldump_path)) ? $custom_mysqldump_path : '';
//COMMON WINDOWS PATHS
if (DUP_Util::isWindows()) {
$paths = array(
$custom_mysqldump_path,
self::getWindowsMySqlDumpRealPath(),
'C:/xampp/mysql/bin/mysqldump.exe',
'C:/Program Files/xampp/mysql/bin/mysqldump',
'C:/Program Files/MySQL/MySQL Server 6.0/bin/mysqldump',
'C:/Program Files/MySQL/MySQL Server 5.5/bin/mysqldump',
'C:/Program Files/MySQL/MySQL Server 5.4/bin/mysqldump',
'C:/wamp64/bin/mysql/mysql5.7.21/bin',
);
//COMMON LINUX PATHS
} else {
$path1 = '';
$path2 = '';
$mysqldump = `which mysqldump`;
if (DUP_Util::isExecutable($mysqldump)) {
$path1 = (!empty($mysqldump)) ? $mysqldump : '';
}
$mysqldump = dirname(`which mysql`)."/mysqldump";
if (DUP_Util::isExecutable($mysqldump)) {
$path2 = (!empty($mysqldump)) ? $mysqldump : '';
}
$paths = array(
$custom_mysqldump_path,
$path1,
$path2,
'/usr/local/bin/mysqldump',
'/usr/local/mysql/bin/mysqldump',
'/usr/mysql/bin/mysqldump',
'/usr/bin/mysqldump',
'/opt/local/lib/mysql6/bin/mysqldump',
'/opt/local/lib/mysql5/bin/mysqldump',
);
}
//Try to find a path that works. With open_basedir enabled, the file_exists may not work on some systems
//So we fallback and try to use exec as a last resort
$exec_available = function_exists('exec');
foreach ($paths as $path) {
if(@file_exists($path)) {
if (DUP_Util::isExecutable($path)) {
return $path;
}
} elseif ($exec_available) {
$out = array();
$rc = -1;
$cmd = $path . ' --help';
@exec($cmd, $out, $rc);
if ($rc === 0) {
return $path;
}
}
}
return false;
}
/**
* Returns an escaped SQL string
*
* @param string $sql The SQL to escape
* @param bool $removePlaceholderEscape Patch for how the default WP function works.
*
* @return boolean|string
* @also see: https://make.wordpress.org/core/2017/10/31/changed-behaviour-of-esc_sql-in-wordpress-4-8-3/
*/
public static function escSQL($sql, $removePlaceholderEscape = false)
{
global $wpdb;
$removePlaceholderEscape = $removePlaceholderEscape && self::$remove_placeholder_escape_exists;
if ($removePlaceholderEscape) {
return $wpdb->remove_placeholder_escape(@esc_sql($sql));
} else {
return @esc_sql($sql);
}
}
}
DUP_DB::init();