<?php
if (!defined('DEDEINC')) exit ('dedebiz');
/**
 * 系统存放函数
 * 
 * @version        $id:common.func.php 4 16:39 2010年7月6日 tianya $
 * @package        DedeBIZ.Libraries
 * @copyright      Copyright (c) 2022 DedeBIZ.COM
 * @license        GNU GPL v2 (https://www.dedebiz.com/license)
 * @link           https://www.dedebiz.com
 */
//类似Bootstrap警告框
define('ALERT_PRIMARY', 1);
define('ALERT_SECONDARY', 2);
define('ALERT_SUCCESS', 3);
define('ALERT_DANGER', 4);
define('ALERT_WARNING', 5);
define('ALERT_INFO', 6);
define('ALERT_LIGHT', 7);
define('ALERT_DARK', 8);
define("ALERT_TPL", '<div style="position:relative;padding:0.75rem 1.25rem;margin-bottom:1rem;width:auto;font-size:14px;color:~color~;background:~background~;border-color:~border~;border:1px solid transparent;border-radius:0.5rem">~content~</div>');
//$content:文档，$type:alert类型
function DedeAlert($content, $type = ALERT_PRIMARY, $isHTML = false)
{
    $colors = array(
        ALERT_PRIMARY => array('#cfe2ff','#b6d4fe','#084298'),
        ALERT_SECONDARY => array('#e2e3e5','#d3d6d8','#41464b'),
        ALERT_SUCCESS => array('#d1e7dd','#badbcc','#0f5132'),
        ALERT_DANGER => array('#f8d7da','#f5c2c7','#842029'),
        ALERT_WARNING => array('#fff3cd','#ffecb5','#664d03'),
        ALERT_INFO => array('#cff4fc','#b6effb','#055160'),
        ALERT_LIGHT => array('#fefefe','#fdfdfe','#636464'),
        ALERT_DARK => array('#d3d3d4','#bcbebf','#141619'),
    );
    $content = $isHTML? RemoveXSS($content) : htmlspecialchars($content);
    $colors = isset($colors[$type])? $colors[$type] : $colors[ALERT_PRIMARY];
    list($background, $border, $color) = $colors;
    return str_replace(array('~color~','~background~','~border~', '~content~'),array($color,$background,$border,$content),ALERT_TPL);
}
if (version_compare(PHP_VERSION, '7.0.0', '>=')) {
    if (!function_exists('mysql_connect') and function_exists('mysqli_connect')) {
        function mysql_connect($server, $username, $password)
        {
            return mysqli_connect($server, $username, $password);
        }
    }
    if (!function_exists('mysql_query') and function_exists('mysqli_query')) {
        function mysql_query($query, $link)
        {
            return mysqli_query($link, $query);
        }
    }
    if (!function_exists('mysql_select_db') and function_exists('mysqli_select_db')) {
        function mysql_select_db($database_name, $link)
        {
            return mysqli_select_db($link, $database_name);
        }
    }
    if (!function_exists('mysql_fetch_array') and function_exists('mysqli_fetch_array')) {
        function mysql_fetch_array($result)
        {
            return mysqli_fetch_array($result);
        }
    }
    if (!function_exists('mysql_close') and function_exists('mysqli_close')) {
        function mysql_close($link)
        {
            if ($link) {
                return @mysqli_close($link);
            } else {
                return false;
            }
        }
    }
    if (!function_exists('mysql_error') and function_exists('mysqli_connect_error')) {
        function mysql_error($link)
        {
            if (mysqli_connect_errno()) {
                return mysqli_connect_error();
            }
            if ($link) {
                return @mysqli_error($link);
            } else {
                return false;
            }
        }
    }
    if (!function_exists('mysql_free_result') and function_exists('mysqli_free_result')) {
        function mysql_free_result($result)
        {
            return mysqli_free_result($result);
        }
    }
    if (!function_exists('split')) {
        function split($pattern, $string)
        {
            return explode($pattern, $string);
        }
    }
}
//一个支持在PHP Cli Server打印的方法
function var_dump_cli($val,...$values)
{
    ob_start();
    var_dump($val,$values);
    error_log(ob_get_clean(), 4);
}
function get_mime_type($filename)
{
    if (!function_exists('finfo_open')) {
        return 'unknow/octet-stream';
    }
    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    $mimeType = finfo_file($finfo, $filename);
    if (preg_match('#\.(php|pl|cgi|asp|aspx|jsp|php5|php4|php3|shtm|shtml)$#i', trim($filename))) {
        return 'forbid/octet-stream';
    }
    finfo_close($finfo);
    return $mimeType;
}
function is_all_numeric(array $array)
{
    foreach ($array as $item) {
        if (!is_numeric($item)) return false;
    }
    return true;
}
function make_hash()
{
    $rand = dede_random_bytes(16);
    $_SESSION['token'] = ($rand === FALSE) ? md5(uniqid(mt_rand(), TRUE)) : bin2hex($rand);
    return $_SESSION['token'];
}
function dede_random_bytes($length)
{
    if (empty($length) or !ctype_digit((string) $length)) {
        return FALSE;
    }
    if (function_exists('openssl_random_pseudo_bytes')) {
        return openssl_random_pseudo_bytes($length);
    }
    if (function_exists('random_bytes')) {
        try {
            return random_bytes((int) $length);
        } catch (Exception $e) {
            return FALSE;
        }
    }
    if (is_readable('/dev/urandom') && ($fp = fopen('/dev/urandom', 'rb')) !== FALSE) {
        version_compare(PHP_VERSION, '5.4.0', '>=') && stream_set_chunk_size($fp, $length);
        $output = fread($fp, $length);
        fclose($fp);
        if ($output !== FALSE) {
            return $output;
        }
    }
    return FALSE;
}
//SQL语句过滤程序，由80sec提供，这里作了适当的修改
if (!function_exists('CheckSql')) {
    function CheckSql($db_string, $querytype = 'select')
    {
        global $cfg_cookie_encode;
        $clean = '';
        $error = '';
        $old_pos = 0;
        $pos = -1;
        $enkey = substr(md5(substr($cfg_cookie_encode.'dedebiz', 0, 5)), 0, 10);
        $log_file = DEDEDATA.'/checksql_'.$enkey.'_safe.txt';
        $userIP = GetIP();
        $getUrl = GetCurUrl();
        //如果是普通查询语句，直接过滤一些特殊语法
        if ($querytype == 'select') {
            $notallow1 = "[^0-9a-z@\._-]{1,}(union|sleep|benchmark|load_file|outfile)[^0-9a-z@\.-]{1,}";
            if (preg_match("/".$notallow1."/i", $db_string)) {
                fputs(fopen($log_file, 'a+'), "$userIP||$getUrl||$db_string||SelectBreak\r\n");
                exit("<span>Safe Alert: Request Error step 1 !</span>");
            }
        }
        //完整的SQL检查
        while (TRUE) {
            $pos = strpos($db_string, '\'', $pos + 1);
            if ($pos === FALSE) {
                break;
            }
            $clean .= substr($db_string, $old_pos, $pos - $old_pos);
            while (TRUE) {
                $pos1 = strpos($db_string, '\'', $pos + 1);
                $pos2 = strpos($db_string, '\\', $pos + 1);
                if ($pos1 === FALSE) {
                    break;
                } elseif ($pos2 == FALSE || $pos2 > $pos1) {
                    $pos = $pos1;
                    break;
                }
                $pos = $pos2 + 1;
            }
            $clean .= '$s$';
            $old_pos = $pos + 1;
        }
        $clean .= substr($db_string, $old_pos);
        $clean = trim(strtolower(preg_replace(array('~\s+~s'), array(' '), $clean)));
        if (
            strpos($clean, '@') !== FALSE  or strpos($clean, 'char(') !== FALSE or strpos($clean, '"') !== FALSE
            or strpos($clean, '$s$$s$') !== FALSE
        ) {
            $fail = TRUE;
            if (preg_match("#^create table#i", $clean)) $fail = FALSE;
            $error = "unusual character";
        }
        //老版本数据库不支持union，程序不使用union，但黑客使用它，所以检查它
        if (strpos($clean, 'union') !== FALSE && preg_match('~(^|[^a-z])union($|[^[a-z])~s', $clean) != 0) {
            $fail = TRUE;
            $error = "union detect";
        }
        //发布版本的程序比较少包括--,#这样的注释，但黑客经常使用它们
        elseif (strpos($clean, '/*') > 2 || strpos($clean, '--') !== FALSE || strpos($clean, '#') !== FALSE) {
            $fail = TRUE;
            $error = "comment detect";
        }
        //这些函数不会被使用，但是黑客会用它来操作文件，down掉数据库
        elseif (strpos($clean, 'sleep') !== FALSE && preg_match('~(^|[^a-z])sleep($|[^[a-z])~s', $clean) != 0) {
            $fail = TRUE;
            $error = "slown down detect";
        } elseif (strpos($clean, 'benchmark') !== FALSE && preg_match('~(^|[^a-z])benchmark($|[^[a-z])~s', $clean) != 0) {
            $fail = TRUE;
            $error = "slown down detect";
        } elseif (strpos($clean, 'load_file') !== FALSE && preg_match('~(^|[^a-z])load_file($|[^[a-z])~s', $clean) != 0) {
            $fail = TRUE;
            $error = "file fun detect";
        } elseif (strpos($clean, 'into outfile') !== FALSE && preg_match('~(^|[^a-z])into\s+outfile($|[^[a-z])~s', $clean) != 0) {
            $fail = TRUE;
            $error = "file fun detect";
        }
        //老版本数据库不支持子查询，该功能也用得少，但黑客可以使用它来查询数据库敏感信息
        elseif (preg_match('~\([^)]*?select~s', $clean) != 0) {
            $fail = TRUE;
            $error = "sub select detect";
        }
        if (!empty($fail)) {
            fputs(fopen($log_file, 'a+'), "$userIP||$getUrl||$db_string||$error\r\n");
            exit("<span>Safe Alert: Request Error step 2!</span>");
        } else {
            return $db_string;
        }
    }
}
/**
 *  载入助手，系统默认载入助手示例
 *  <code>
 *  if (!function_exists('HelloDede'))
 *  {
 *      function HelloDede()
 *      {
 *          echo "Hello! Dede";
 *      }
 *  }
 *  </code>
 *  开发中使用这个助手的时候直接使用函数helper('test');初始化它，然后在文件中就可以直接使用:HelloDede();调用
 *
 * @access    public
 * @param     mix   $helpers  助手名称，可以是数组，可以是单个字符串
 * @return    void
 */
$_helpers = array();
function helper($helpers)
{
    //如果是数组，则进行递归操作
    if (is_array($helpers)) {
        foreach ($helpers as $dede) {
            helper($dede);
        }
        return;
    }
    if (isset($_helpers[$helpers])) {
        return;
    }
    if (file_exists(DEDEINC.'/helpers/'.$helpers.'.helper.php')) {
        include_once(DEDEINC.'/helpers/'.$helpers.'.helper.php');
        $_helpers[$helpers] = TRUE;
    }
    //无法载入助手
    if (!isset($_helpers[$helpers])) {
        exit('Unable to load the requested file: helpers/'.$helpers.'.helper.php');
    }
}
function dede_htmlspecialchars($str)
{
    global $cfg_soft_lang;
    if (version_compare(PHP_VERSION, '5.4.0', '<')) return htmlspecialchars($str);
    if ($cfg_soft_lang == 'gb2312') return htmlspecialchars($str, ENT_COMPAT, 'ISO-8859-1');
    else return htmlspecialchars($str);
}
/**
 *  载入助手，这里会员载入用helps载入多个助手
 *
 * @access    public
 * @param     string
 * @return    void
 */
function helpers($helpers)
{
    helper($helpers);
}
//兼容php4的file_put_contents
if (!function_exists('file_put_contents')) {
    function file_put_contents($n, $d)
    {
        $f = @fopen($n, "w");
        if (!$f) {
            return FALSE;
        } else {
            fwrite($f, $d);
            fclose($f);
            return TRUE;
        }
    }
}
/**
 *  短消息函数，可以在某个动作处理后友好的系统提示
 *
 * @param     string  $msg       消息系统提示
 * @param     string  $gourl     跳转地址
 * @param     int     $onlymsg   仅显示信息
 * @param     int     $limittime 限制时间
 * @param     string  $btnmsg    按钮提示
 * @param     string  $target    跳转类型
 * @return    void
 */
function ShowMsg($msg, $gourl, $onlymsg = 0, $limittime = 0)
{
    if (defined('DEDE_DIALOG_UPLOAD') && !isset($GLOBALS['noeditor'])) {
        echo json_encode(array(
            "uploaded"=>0,
            "error"=>array(
                "message" => $msg,
            ),
        ));
        return;
    }
    if (isset($GLOBALS['format']) && strtolower($GLOBALS['format'])==='json') {
        echo json_encode(array(
            "code"=>0,
            "msg"=>$msg,
            "gourl"=>$gourl,
        ));
        return;
    }
    if (empty($GLOBALS['cfg_plus_dir'])) $GLOBALS['cfg_plus_dir'] = '..';
    $htmlhead  = "<!DOCTYPE html><html><head><meta charset='utf-8'><meta http-equiv='X-UA-Compatible' content='IE=Edge,chrome=1'><meta name='viewport' content='width=device-width,initial-scale=1'><title>系统提示</title><link rel='stylesheet' href='/static/web/css/bootstrap.min.css'><link rel='stylesheet' href='/static/web/css/admin.css'></head><base target='_self'><body class='body-bg'><script>";
    $htmlfoot  = "</script></body></html>";
    $litime = ($limittime == 0 ? 1000 : $limittime);
    $func = '';
    if ($gourl == '-1') {
        if ($limittime == 0) $litime = 3000;
        $gourl = "javascript:history.go(-1);";
    }
    if ($gourl == '' || $onlymsg == 1) {
        $msg = "<script>alert(\"".str_replace("\"", "“", $msg)."\");</script>";
    } else {
        //当网址为:close::objname时，关闭父框架的id=objname元素
        if (preg_match('/close::/', $gourl)) {
            $tgobj = trim(preg_replace('/close::/', '', $gourl));
            $gourl = 'javascript:;';
            $func .= "window.parent.document.getElementById('{$tgobj}').style.display='none';\r\n";
        }
        $func .= "var pgo=0;function JumpUrl(){if (pgo==0) {location='$gourl'; pgo=1;}}";
        $rmsg = $func;
        $rmsg .= "document.write(\"<div class='tips'><div class='tips-box'><div class='tips-head'><p>系统提示</p></div>\");";
        $rmsg .= "document.write(\"<div class='tips-body'>\");";
        $rmsg .= "document.write(\"".str_replace("\"", "“", $msg)."\");";
        $rmsg .= "document.write(\"";
        if ($onlymsg == 0) {
            if ($gourl != 'javascript:;' && $gourl != '') {
                $rmsg .= "<div class='text-center mt-3'><a href='{$gourl}' class='btn btn-success btn-sm'>点击反应</a></div>\");";
                $rmsg .= "setTimeout('JumpUrl()', $litime);";
            } else {
                $rmsg .= "</div>\");";
            }
        } else {
            $rmsg .= "</div></div>\");";
        }
        $msg  = $htmlhead.$rmsg.$htmlfoot;
    }
    echo $msg;
}
/**
 * 表中是否存在某个字段
 *
 * @param  mixed $tablename 表名称
 * @param  mixed $field 字段名
 * @return void
 */
function TableHasField($tablename, $field)
{
    global $dsql;
    $dsql->GetTableFields($tablename,"tfd");
    while ($r = $dsql->GetFieldObject("tfd")) {
        if ($r->name === $field) {
            return true;
        }
    }
    return false;
}
function GetSimpleServerSoftware()
{
    if (preg_match("#^php#i",$_SERVER["SERVER_SOFTWARE"])) {
        return 'PHP Server';
    } else if (preg_match("#^apache#i",$_SERVER["SERVER_SOFTWARE"])){
        return 'Apache';
    } else if (preg_match("#^nginx#i",$_SERVER["SERVER_SOFTWARE"])){
        return 'Nginx';
    } else if (preg_match("#^microsoft-iis#i",$_SERVER["SERVER_SOFTWARE"])){
        return 'IIS';
    } else if (preg_match("#^caddy#i",$_SERVER["SERVER_SOFTWARE"])){
        return 'Caddy';
    } else {
        return 'Other';
    }
}
/**
 *  获取验证码的session值
 *
 * @return    string
 */
function GetCkVdValue()
{
    @session_id($_COOKIE['PHPSESSID']);
    @session_start();
    return isset($_SESSION['securimage_code_value']) ? $_SESSION['securimage_code_value'] : '';
}
/**
 *  PHP某些版本有Bug，不能在同一作用域中同时读session并改注销它，因此调用后需执行本函数
 *
 * @return    void
 */
function ResetVdValue()
{
    @session_start();
    $_SESSION['securimage_code_value'] = '';
}
function IndexSub($idx, $num)
{
    return intval($idx) - intval($num) == 0 ? '0 ' : intval($idx) - intval($num);
}
/**
 * HideEmail隐藏邮箱
 *
 * @param  mixed $email
 * @return string
 */
function HideEmail($email)
{
    if (empty($email)) return "暂无";
    $em   = explode("@",$email);
    $name = implode('@', array_slice($em, 0, count($em)-1));
    $len  = floor(strlen($name)/2);
    return substr($name,0, $len).str_repeat('*', $len)."@".end($em);   
}
//用来返回index的active
function IndexActive($idx)
{
    if ($idx == 1) {
        return ' active';
    } else {
        return '';
    }
}
//是否是HTTPS
function IsSSL()
{
    if (@$_SERVER['HTTPS'] && ('1' == $_SERVER['HTTPS'] || 'on' == strtolower($_SERVER['HTTPS']))) {
        return true;
    } elseif ('https' == @$_SERVER['REQUEST_SCHEME']) {
        return true;
    } elseif ('443' == $_SERVER['SERVER_PORT']) {
        return true;
    } elseif ('https' == @$_SERVER['HTTP_X_FORWARDED_PROTO']) {
        return true;
    }
    return false;
}
//获取对应版本号的更新SQL
function GetUpdateSQL()
{
    global $cfg_dbprefix, $cfg_dbtype, $cfg_db_language;
    $result = array();
    $query = '';
    $sql4tmp = "ENGINE=MyISAM DEFAULT CHARSET=".$cfg_db_language;
    $fp = fopen(DEDEROOT.'/install/update.txt','r');
    $sqls = array();
    $current_ver = '';
    while(!feof($fp))
    {
        $line = rtrim(fgets($fp,1024));
        if (preg_match("/\-\- ([\d\.]+)/",$line,$matches)) {
            if (count($sqls) > 0) {
                $result[$current_ver] = $sqls;
            }
            $sqls = array();
            $current_ver = $matches[1];
        }
        if (preg_match("#;$#", $line)) {
            $query .= $line."\n";
            $query = str_replace('#@__',$cfg_dbprefix,$query);
            if ($cfg_dbtype == 'sqlite') {
                $query = preg_replace('/character set (.*?) /i','',$query);
                $query = preg_replace('/unsigned/i','',$query);
                $query = str_replace('TYPE=MyISAM','',$query);
                $query = preg_replace ('/TINYINT\(([\d]+)\)/i','INTEGER',$query);
                $query = preg_replace ('/mediumint\(([\d]+)\)/i','INTEGER',$query);
                $query = preg_replace ('/smallint\(([\d]+)\)/i','INTEGER',$query);
                $query = preg_replace('/int\(([\d]+)\)/i','INTEGER',$query);
                $query = preg_replace('/auto_increment/i','PRIMARY KEY AUTOINCREMENT',$query);
                $query = preg_replace('/,([\t\s ]+)KEY(.*?)MyISAM;/','',$query);
                $query = preg_replace('/,([\t\s ]+)KEY(.*?);/',');',$query);
                $query = preg_replace('/,([\t\s ]+)UNIQUE KEY(.*?);/',');',$query);
                $query = preg_replace('/set\(([^\)]*?)\)/','varchar',$query);
                $query = preg_replace('/enum\(([^\)]*?)\)/','varchar',$query);
                if (preg_match("/PRIMARY KEY AUTOINCREMENT/",$query)) {
                    $query = preg_replace('/,([\t\s ]+)PRIMARY KEY([\t\s ]+)\(`([0-9a-zA-Z]+)`\)/i','',$query);
                }
                $sqls[] = $query;
            } else {
                if (preg_match('#CREATE#i', $query)) {
                    $sqls[] = preg_replace("#TYPE=MyISAM#i",$sql4tmp,$query);
                } else {
                    $sqls[] = $query;
                }
            }
            $query='';
        } else if (!preg_match("#^(\/\/|--)#", $line)) {
            $query .= $line;
        }
    }
    if (count($sqls) > 0) {
        $result[$current_ver] = $sqls;
    }
    fclose($fp);
    return $result;
}
/**
 * GetMimeTypeOrExtension
 *
 * @param  mixed $str 字符串
 * @param  mixed $t 类型，0获取mime type，1获取扩展名
 * @return string
 */
function GetMimeTypeOrExtension($str, $t = 0) {
    $mime_types = array(
        'aac' => 'audio/aac',
        'abw' => 'application/x-abiword',
        'arc' => 'application/x-freearc',
        'avi' => 'video/x-msvideo',
        'azw' => 'application/vnd.amazon.ebook',
        'bin' => 'application/octet-stream',
        'bmp' => 'image/bmp',
        'bz' => 'application/x-bzip',
        'bz2' => 'application/x-bzip2',
        'csh' => 'application/x-csh',
        'css' => 'text/css',
        'csv' => 'text/csv',
        'doc' => 'application/msword',
        'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
        'eot' => 'application/vnd.ms-fontobject',
        'epub' => 'application/epub+zip',
        'gif' => 'image/gif',
        'htm' => 'text/html',
        'html' => 'text/html',
        'ico' => 'image/vnd.microsoft.icon',
        'ics' => 'text/calendar',
        'jar' => 'application/java-archive',
        'jpeg' => 'image/jpeg',
        'jpg' => 'image/jpeg',
        'js' => 'text/javascript',
        'json' => 'application/json',
        'jsonld' => 'application/ld+json',
        'mid' => 'audio/midi',
        'midi' => 'audio/midi',
        'mjs' => 'text/javascript',
        'mp3' => 'audio/mpeg',
        'mp4' => 'video/mp4',
        'mpeg' => 'video/mpeg',
        'mpkg' => 'application/vnd.apple.installer+xml',
        'odp' => 'application/vnd.oasis.opendocument.presentation',
        'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
        'odt' => 'application/vnd.oasis.opendocument.text',
        'oga' => 'audio/ogg',
        'ogv' => 'video/ogg',
        'ogx' => 'application/ogg',
        'otf' => 'font/otf',
        'png' => 'image/png',
        'pdf' => 'application/pdf',
        'ppt' => 'application/vnd.ms-powerpoint',
        'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
        'rar' => 'application/x-rar-compressed',
        'rtf' => 'application/rtf',
        'sh' => 'application/x-sh',
        'svg' => 'image/svg+xml',
        'swf' => 'application/x-shockwave-flash',
        'tar' => 'application/x-tar',
        'tif' => 'image/tiff',
        'tiff' => 'image/tiff',
        'ttf' => 'font/ttf',
        'txt' => 'text/plain',
        'vsd' => 'application/vnd.visio',
        'wav' => 'audio/wav',
        'weba' => 'audio/webm',
        'webm' => 'video/webm',
        'webp' => 'image/webp',
        'woff' => 'font/woff',
        'woff2' => 'font/woff2',
        'xhtml' => 'application/xhtml+xml',
        'xls' => 'application/vnd.ms-excel',
        'xlsx' => 'application/vnd.ms-excel',
        'xml' => 'application/xml',
        'xul' => 'application/vnd.mozilla.xul+xml',
        'zip' => 'application/zip',
        '3gp' => 'video/3gpp',
        '3g2' => 'video/3gpp2',
        '7z' => 'application/x-7z-compressed',
        'wmv' => 'video/x-ms-asf',
        'wma' => 'audio/x-ms-wma',
        'mov' => 'video/quicktime',
        'rm' => 'application/vnd.rn-realmedia',
        'mpg' => 'video/mpeg',
        'mpga' => 'audio/mpeg',
    );
    if ($t===0) {
        return isset($mime_types[$str])? $mime_types[$str] : 'application/octet-stream';
    } else {
        foreach ($mime_types  as $key => $value) {
            if ($value == $str) return $key;
        }
        return "dedebiz";
    }
}
//自定义函数接口
if (file_exists(DEDEINC.'/extend.func.php')) {
    require_once(DEDEINC.'/extend.func.php');
}
?>