Discuz!常用函數解析（續）

/**
* 產生隨機碼
* @param $length - 要多長
* @param $numberic - 數字還是字符串
* @return 返回字符串
*/
function random($length, $numeric = 0) {
        PHP_VERSION < '4.2.0' && mt_srand((double)microtime() * 1000000);
        if($numeric) {
                $hash = sprintf('%0'.$length.'d', mt_rand(0, pow(10, $length) - 1));
        } else {
                $hash = '';
                $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
                $max = strlen($chars) - 1;
                for($i = 0; $i < $length; $i++) {
                        $hash .= $chars[mt_rand(0, $max)];
                }
        }
        return $hash;
}

/**
* 刪除非空目錄
* @param $path 目錄
*/
function removedir($dirname, $keepdir = FALSE) {

        $dirname = wipespecial($dirname);

        if(!is_dir($dirname)) {
                return FALSE;
        }
        $handle = opendir($dirname);
        while(($file = readdir($handle)) !== FALSE) {
                if($file != '.' && $file != '..') {
                        $dir = $dirname . DIRECTORY_SEPARATOR . $file;
                        is_dir($dir) ? removedir($dir) : unlink($dir);
                }
        }
        closedir($handle);
        return !$keepdir ? (@rmdir($dirname) ? TRUE : FALSE) : TRUE;
}

function request($cachekey, $fid = 0, $type = 0, $return = 0) {
        global $timestamp, $_DCACHE;
        $datalist = '';
        if($fid && in_array(CURSCRIPT, array('forumdisplay', 'viewthread'))) {
                $specialfid = $GLOBALS['forum']['fid'];
                $cachekey = !isset($GLOBALS['infosidestatus']['f'.$specialfid][$type]) ? $GLOBALS['infosidestatus'][$type] : $GLOBALS['infosidestatus']['f'.$specialfid][$type];
                $key = $cachekey;
                $cachekey .= '_fid'.$specialfid;
        } else {
                $specialfid = 0;
                $key = $cachekey;
        }
        $cachefile = DISCUZ_ROOT.'./forumdata/cache/request_'.$cachekey.'.php';
        if((@!include($cachefile)) || $expiration < $timestamp) {
                require_once DISCUZ_ROOT.'./forumdata/cache/cache_request.php';
                require_once DISCUZ_ROOT.'./include/request.func.php';
                parse_str($_DCACHE['request'][$key]['url'], $requestdata);
                $datalist = parse_request($requestdata, $cachefile, 0, $specialfid, $key);
        }
        if(!$return) {
                echo $datalist;
        } else {
                return $datalist;
        }
}

/**
* 發送郵件
* @param $email_to - 接受者
* @param $email_subject - 標題
* @param $email_messge - 內容
* @param $email_from - 發送者
*/
function sendmail($email_to, $email_subject, $email_message, $email_from = '') {
        extract($GLOBALS, EXTR_SKIP);
        require DISCUZ_ROOT.'./include/sendmail.inc.php';
}

/**
* 發送短消息
* @param $toid - 接收方id
* @param $subject - 標題
* @param $message - 內容
* @param $fromid - 發送方id
* @param $from - 發送方名字
*/
function sendpm($toid, $subject, $message, $fromid = '') {
        extract($GLOBALS, EXTR_SKIP);
        include language('pms');

        require_once DISCUZ_ROOT.'./uc_client/client.php';

        if(isset($language[$subject])) {
                eval("\$subject = addslashes(\"".$language[$subject]."\");");
        }
        if(isset($language[$message])) {
                eval("\$message = addslashes(\"".$language[$message]."\");");
        }

        if($fromid === '') {
                $fromid = $discuz_uid;
        }
        uc_pm_send($fromid, $toid, $subject, $message);
}

/**
* 顯示標準提示信息
* @param $toid - 信息
* @param $subject - 跳轉到的url
* @param $message - 擴展
*/
function showmessage($message, $url_forward = '', $extra = '') {
        extract($GLOBALS, EXTR_SKIP);
        global $extrahead, $discuz_action, $debuginfo, $seccode, $fid, $tid, $charset, $show_message, $inajax, $_DCACHE, $advlist;
        define('CACHE_FORBIDDEN', TRUE);
        $show_message = $message;
        $msgforward = unserialize($_DCACHE['settings']['msgforward']);
        $msgforward['refreshtime'] = intval($msgforward['refreshtime']) * 1000;
        $url_forward = empty($url_forward) ? '' : (empty($_DCOOKIE['sid']) && $transsidstatus ? transsid($url_forward) : $url_forward);

        if($url_forward && empty($inajax) && $msgforward['quick'] && $msgforward['messages'] && @in_array($message, $msgforward['messages'])) {
                updatesession();
                dheader("location: ".str_replace('&', '&', $url_forward));
        }

        if(in_array($extra, array('HALTED', 'NOPERM'))) {
                $fid = $tid = 0;
                $discuz_action = 254;
        } else {
                $discuz_action = 255;
        }

        include language('messages');

        if(isset($language[$message])) {
                $pre = $inajax ? 'ajax_' : '';
                eval("\$show_message = \"".(isset($language[$pre.$message]) ? $language[$pre.$message] : $language[$message])."\";");
                unset($pre);
        }

        $show_message .= $url_forward && empty($inajax) ? '<script>setTimeout("window.location.href =\''.$url_forward.'\';", '.$msgforward['refreshtime'].');</script>' : '';

        if($advlist = array_merge($globaladvs ? $globaladvs['type'] : array(), $redirectadvs ? $redirectadvs['type'] : array())) {
                $advitems = ($globaladvs ? $globaladvs['items'] : array()) + ($redirectadvs ? $redirectadvs['items'] : array());
                foreach($advlist AS $type => $redirectadvs) {
                        $advlist[$type] = $advitems[$redirectadvs[array_rand($redirectadvs)]];
                }
        }

        if($extra == 'NOPERM') {
                //get secure code checking status (pos. -2)
                if($seccodecheck = substr(sprintf('%05b', $seccodestatus), -2, 1)) {
                        $seccode = random(6, 1) + $seccode{0} * 1000000;
                }
                include template('nopermission');
        } else {
                include template('showmessage');
        }
        dexit();
}

/**
* 顯示等級
* @param $num - 等級
*/
function showstars($num) {
        global $starthreshold;

        $alt = 'alt="Rank: '.$num.'"';
        if(empty($starthreshold)) {
                for($i = 0; $i < $num; $i++) {
                        echo '<img src="'.IMGDIR.'/star_level1.gif" '.$alt.' />';
                }
        } else {
                for($i = 3; $i > 0; $i--) {
                        $numlevel = intval($num / pow($starthreshold, ($i - 1)));
                        $num = ($num % pow($starthreshold, ($i - 1)));
                        for($j = 0; $j < $numlevel; $j++) {
                                echo '<img src="'.IMGDIR.'/star_level'.$i.'.gif" '.$alt.' />';
                        }
                }
        }
}

/**
* 返回當前鏈接的域名
* @return 返回域名
*/
function site() {
        return $_SERVER['HTTP_HOST'];
}

/**
* 判斷一個字符串是否在另一個字符串中存在
* @param haystack 待查找的字符串
* @param $needls 被查找的字符串
* @return 是否存在
*/
function strexists($haystack, $needle) {
        return !(strpos($haystack, $needle) === FALSE);
}

/**
* 驗證碼數字轉字母
* @param seccode 帶轉換的驗證碼數字變量
*/
function seccodeconvert(&$seccode) {
        global $seccodedata, $charset;
        $seccode = substr($seccode, -6);
        if($seccodedata['type'] == 1) {
                include_once language('seccode');
                $len = strtoupper($charset) == 'GBK' ? 2 : 3;
                $code = array(substr($seccode, 0, 3), substr($seccode, 3, 3));
                $seccode = '';
                for($i = 0; $i < 2; $i++) {
                        $seccode .= substr($lang['chn'], $code[$i] * $len, $len);
                }
                return;
        } elseif($seccodedata['type'] == 3) {
                $s = sprintf('%04s', base_convert($seccode, 10, 20));
                $seccodeunits = 'CEFHKLMNOPQRSTUVWXYZ';
        } else {
                $s = sprintf('%04s', base_convert($seccode, 10, 24));
                $seccodeunits = 'BCEFGHJKMPQRTVWXY2346789';
        }
        $seccode = '';
        for($i = 0; $i < 4; $i++) {
                $unit = ord($s{$i});
                $seccode .= ($unit >= 0x30 && $unit <= 0x39) ? $seccodeunits[$unit - 0x30] : $seccodeunits[$unit - 0x57];
        }
}

/**
* 檢查是否正確提交了表單
* @param $var 需要檢查的變量
* @param $allowget 是否允許GET方式
* @param $seccodecheck 驗證碼檢測是否開啓
* @return 返回是否正確提交了表單
*/
function submitcheck($var, $allowget = 0, $seccodecheck = 0, $secqaacheck = 0) {
        if(empty($GLOBALS[$var])) {
                return FALSE;
        } else {
                global $_SERVER, $seclevel, $seccode, $seccodedata, $seccodeverify, $secanswer, $_DCACHE, $_DCOOKIE, $timestamp, $discuz_uid;
                if($allowget || ($_SERVER['REQUEST_METHOD'] == 'POST' && $GLOBALS['formhash'] == formhash() && (empty($_SERVER['HTTP_REFERER']) ||
                        preg_replace("/https?:\/\/([^\:\/]+).*/i", "\\1", $_SERVER['HTTP_REFERER']) == preg_replace("/([^\:]+).*/", "\\1", $_SERVER['HTTP_HOST'])))) {
                        if($seccodecheck) {
                                if(!$seclevel) {
                                        $key = $seccodedata['type'] != 3 ? '' : $_DCACHE['settings']['authkey'].date('Ymd');
                                        list($seccode, $expiration, $seccodeuid) = explode("\t", authcode($_DCOOKIE['secc'], 'DECODE', $key));
                                        if($seccodeuid != $discuz_uid || $timestamp - $expiration > 600) {
                                                showmessage('submit_seccode_invalid');
                                        }
                                        dsetcookie('secc', '', -86400 * 365);
                                } else {
                                        $tmp = substr($seccode, 0, 1);
                                }
                                seccodeconvert($seccode);
                                if(strtoupper($seccodeverify) != $seccode) {
                                        showmessage('submit_seccode_invalid');
                                }
                                $seclevel && $seccode = random(6, 1) + $tmp * 1000000;
                        }
                        if($secqaacheck) {
                                if(!$seclevel) {
                                        list($seccode, $expiration, $seccodeuid) = explode("\t", authcode($_DCOOKIE['secq'], 'DECODE'));
                                        if($seccodeuid != $discuz_uid || $timestamp - $expiration > 600) {
                                                showmessage('submit_secqaa_invalid');
                                        }
                                        dsetcookie('secq', '', -86400 * 365);
                                }
                                require_once DISCUZ_ROOT.'./forumdata/cache/cache_secqaa.php';
                                if(md5($secanswer) != $_DCACHE['secqaa'][substr($seccode, 0, 1)]['answer']) {
                                        showmessage('submit_secqaa_invalid');
                                }
                                $seclevel && $seccode = random(1, 1) * 1000000 + substr($seccode, -6);
                        }
                        return TRUE;
                } else {
                        showmessage('submit_invalid');
                }
        }
}

/**
* 解析模板
* @return 返回域名
*/
function template($file, $templateid = 0, $tpldir = '') {
        global $inajax;
        $file .= $inajax && ($file == 'header' || $file == 'footer') ? '_ajax' : '';
        $tpldir = $tpldir ? $tpldir : TPLDIR;
        $templateid = $templateid ? $templateid : TEMPLATEID;

        $tplfile = DISCUZ_ROOT.'./'.$tpldir.'/'.$file.'.htm';
        $objfile = DISCUZ_ROOT.'./forumdata/templates/'.$templateid.'_'.$file.'.tpl.php';
        if($templateid != 1 && !file_exists($tplfile)) {
                $tplfile = DISCUZ_ROOT.'./templates/default/'.$file.'.htm';
        }
        @checktplrefresh($tplfile, $tplfile, filemtime($objfile), $templateid, $tpldir);

        return $objfile;
}

/**
* 如果cookie關閉使用GET方式傳遞sid
* @param $url - 地址
* @param $tag - 標記
* @param $wml - 取得sid的input
* @return 返回url
*/
function transsid($url, $tag = '', $wml = 0) {
        global $sid;
        $tag = stripslashes($tag);
        if(!$tag || (!preg_match("/^(http:\/\/|mailto:|#|javascript)/i", $url) && !strpos($url, 'sid='))) {
                if($pos = strpos($url, '#')) {
                        $urlret = substr($url, $pos);
                        $url = substr($url, 0, $pos);
                } else {
                        $urlret = '';
                }
                $url .= (strpos($url, '?') ? ($wml ? '&' : '&') : '?').'sid='.$sid.$urlret;
        }
        return $tag.$url;
}

/**
* 顯示主題分類
* @param $curtypeid - 當前被選擇的類型id
* @return 返回的HTML數據
*/
function typeselect($curtypeid = 0, $special = '', $onchange = '', $modelid = 0) {
        global $fid, $sid, $extra;
        $onchange = $onchange ? $onchange : "onchange=\"ajaxget('post.php?action=threadtypes&typeid='+this.options[this.selectedIndex].value+'&fid=$fid&sid=$sid', 'threadtypes', 'threadtypeswait')\"";
        if($threadtypes = $GLOBALS['forum']['threadtypes']) {
                $selecthtml = '';
                foreach($threadtypes['types'] as $typeid => $name) {
                        if(!$special || $special == 'disabled' || !$threadtypes['special'][$typeid]) {
                                $typehtml = '<option value="'.$typeid.'" '.($curtypeid == $typeid ? 'selected="selected"' : '').' '.($threadtypes['special'][$typeid] ? 'class="special"' : '').'>'.strip_tags($name).'</option>';
                                $selecthtml .= $modelid ? ($threadtypes['modelid'][$typeid] == $modelid ? $typehtml : '') : $typehtml;
                        }
                }
                $html = $selecthtml ? '<select name="typeid" '.(!$special ? $onchange : '').'><option value="0"> </option>'.$selecthtml.'</select><span id="threadtypeswait"></span>'.($special === 'disabled' ? '<input type="hidden" name="typeid" value="'.$curtypeid.'" />' : '') : '';
                return $html;
        } else {
                return '';
        }
}

/**
* 更新積分
* @param $uids - 用戶id數組
* @param $creditsarray - 積分數組
* @param $coef - 積分
* @param $extrasql - 擴展SQL
*/
function updatecredits($uids, $creditsarray, $coef = 1, $extrasql = '') {
        if($uids && ((!empty($creditsarray) && is_array($creditsarray)) || $extrasql)) {
                global $db, $tablepre;
                $creditsadd = $comma = '';
                foreach($creditsarray as $id => $addcredits) {
                        $creditsadd .= $comma.'extcredits'.$id.'=extcredits'.$id.'+('.intval($addcredits).')*('.$coef.')';
                        $comma = ', ';
                }

                if($creditsadd || $extrasql) {
                        $db->query("UPDATE {$tablepre}members SET $creditsadd ".($creditsadd && $extrasql ? ', ' : '')." $extrasql WHERE uid IN ('$uids')", 'UNBUFFERED');
                }
        }
}

/**
* 更新session
*/
function updatesession() {
        if(!empty($GLOBALS['sessionupdated'])) {
                return TRUE;
        }

        global $db, $tablepre, $sessionexists, $sessionupdated, $sid, $onlineip, $discuz_uid, $discuz_user, $timestamp, $lastactivity, $seccode,
                $pvfrequence, $spageviews, $lastolupdate, $oltimespan, $onlinehold, $groupid, $styleid, $invisible, $discuz_action, $fid, $tid;

        $fid = intval($fid);
        $tid = intval($tid);

        if($oltimespan && $discuz_uid && $lastactivity && $timestamp - ($lastolupdate ? $lastolupdate : $lastactivity) > $oltimespan * 60) {
                $lastolupdate = $timestamp;
                $db->query("UPDATE {$tablepre}onlinetime SET total=total+'$oltimespan', thismonth=thismonth+'$oltimespan', lastupdate='$timestamp' WHERE uid='$discuz_uid' AND lastupdate<='".($timestamp - $oltimespan * 60)."'");
                if(!$db->affected_rows()) {
                        $db->query("INSERT INTO {$tablepre}onlinetime (uid, thismonth, total, lastupdate)
                                VALUES ('$discuz_uid', '$oltimespan', '$oltimespan', '$timestamp')", 'SILENT');
                }
        } else {
                $lastolupdate = intval($lastolupdate);
        }

        if($sessionexists == 1) {
                if($pvfrequence && $discuz_uid) {
                        if($spageviews >= $pvfrequence) {
                                $pageviewsadd = ', pageviews=\'0\'';
                                $db->query("UPDATE {$tablepre}members SET pageviews=pageviews+'$spageviews' WHERE uid='$discuz_uid'", 'UNBUFFERED');
                        } else {
                                $pageviewsadd = ', pageviews=pageviews+1';
                        }
                } else {
                        $pageviewsadd = '';
                }
                $db->query("UPDATE {$tablepre}sessions SET uid='$discuz_uid', username='$discuz_user', groupid='$groupid', styleid='$styleid', invisible='$invisible', action='$discuz_action', lastactivity='$timestamp', lastolupdate='$lastolupdate', seccode='$seccode', fid='$fid', tid='$tid' $pageviewsadd WHERE sid='$sid'");
        } else {
                $ips = explode('.', $onlineip);

                $db->query("DELETE FROM {$tablepre}sessions WHERE sid='$sid' OR lastactivity<($timestamp-$onlinehold) OR ('$discuz_uid'<>'0' AND uid='$discuz_uid') OR (uid='0' AND ip1='$ips[0]' AND ip2='$ips[1]' AND ip3='$ips[2]' AND ip4='$ips[3]' AND lastactivity>$timestamp-60)");
                $db->query("INSERT INTO {$tablepre}sessions (sid, ip1, ip2, ip3, ip4, uid, username, groupid, styleid, invisible, action, lastactivity, lastolupdate, seccode, fid, tid)
                        VALUES ('$sid', '$ips[0]', '$ips[1]', '$ips[2]', '$ips[3]', '$discuz_uid', '$discuz_user', '$groupid', '$styleid', '$invisible', '$discuz_action', '$timestamp', '$lastolupdate', '$seccode', '$fid', '$tid')", 'SILENT');
                if($discuz_uid && $timestamp - $lastactivity > 21600) {
                        if($oltimespan && $timestamp - $lastactivity > 86400) {
                                $query = $db->query("SELECT total FROM {$tablepre}onlinetime WHERE uid='$discuz_uid'");
                                $oltimeadd = ', oltime='.round(intval($db->result($query, 0)) / 60);
                        } else {
                                $oltimeadd = '';
                        }
                        $db->query("UPDATE {$tablepre}members SET lastip='$onlineip', lastvisit=lastactivity, lastactivity='$timestamp' $oltimeadd WHERE uid='$discuz_uid'", 'UNBUFFERED');
                }
        }

        $sessionupdated = 1;
}
/**
* 更新管理者狀態
* @param $modacton - 動作
* @param $smcols - 執行次數
*/
function updatemodworks($modaction, $posts = 1) {
        global $modworkstatus, $db, $tablepre, $discuz_uid, $timestamp, $_DCACHE;
        $today = gmdate('Y-m-d', $timestamp + $_DCACHE['settings']['timeoffset'] * 3600);
        if($modworkstatus && $modaction && $posts) {
                $db->query("UPDATE {$tablepre}modworks SET count=count+1, posts=posts+'$posts' WHERE uid='$discuz_uid' AND modaction='$modaction' AND dateline='$today'");
                if(!$db->affected_rows()) {
                        $db->query("INSERT INTO {$tablepre}modworks (uid, modaction, dateline, count, posts) VALUES ('$discuz_uid', '$modaction', '$today', 1, '$posts')");
                }
        }
}

/**
* 寫日誌
* @param $path 日誌名稱
* @param $log 日誌
*/
function writelog($file, $log) {
        global $timestamp, $_DCACHE;
        $yearmonth = gmdate('Ym', $timestamp + $_DCACHE['settings']['timeoffset'] * 3600);
        $logdir = DISCUZ_ROOT.'./forumdata/logs/';
        $logfile = $logdir.$yearmonth.'_'.$file.'.php';
        if(@filesize($logfile) > 2048000) {
                $dir = opendir($logdir);
                $length = strlen($file);
                $maxid = $id = 0;
                while($entry = readdir($dir)) {
                        if(strexists($entry, $yearmonth.'_'.$file)) {
                                $id = intval(substr($entry, $length + 8, -4));
                                $id > $maxid && $maxid = $id;
                        }
                }
                closedir($dir);

                $logfilebak = $logdir.$yearmonth.'_'.$file.'_'.($maxid + 1).'.php';
                @rename($logfile, $logfilebak);
        }
        if($fp = @fopen($logfile, 'a')) {
                @flock($fp, 2);
                $log = is_array($log) ? $log : array($log);
                foreach($log as $tmp) {
                        fwrite($fp, "<?PHP exit;?>\t".str_replace(array('<?', '?>'), '', $tmp)."\n");
                }
                fclose($fp);
        }
}

function wipespecial($str) {
        return str_replace(array( "\n", "\r", '..'), array('', '', ''), $str);
}

function discuz_uc_avatar($uid, $size = '') {
        return UC_API.'/avatar.php?uid='.$uid.'&size='.$size;
}

?>