Discuz!源代碼分析系列:./include/global.func.php(3)

轉自www.discuz.net　做者：郭鑫 /** * 輸出用的，這個時候能夠作一點事情，好比說：把sid用正則寫到form裏面，rewrite規則啓用後把論壇裏面的forumdisplay.php?fid=1&page=2用正則換成forum-1-2.html。 * 並把ftp鏈接關掉，寫入cache */ function output() {         global $sid, $transsidstatus, $rewritestatus, $ftp;         if(($transsidstatus = empty($GLOBALS['_DCOOKIE']['sid']) && $transsidstatus) || in_array($rewritestatus, array(2, 3))) {                 if($transsidstatus) {                         $searcharray = array                                 (                                 "/\<a(\s*[^\>]+\s*)href\=([\"|\']?)([^\"\'\s]+)/ies",                                 "/(\<form.+?\>)/is"                                 );                         $replacearray = array                                 (                                 "transsid('\\3','<a\\1href=\\2')",                                 "\\1\n<input type=\"hidden\" name=\"sid\" value=\"$sid\">"                                 );                 } else {                         $searcharray = array                                 (                                 //"/\<a href\=\"index\.php\"\>/",                                 "/\<a href\=\"forumdisplay\.php\?fid\=(\d+)(&page\=(\d+))?\"([^\>]*)\>/e",                                 "/\<a href\=\"viewthread\.php\?tid\=(\d+)(&extra\=page\%3D(\d+))?(&page\=(\d+))?\"([^\>]*)\>/e",                                 "/\<a href\=\"viewpro\.php\?(uid\=(\d+)|username\=([^&]+?))\"([^\>]*)\>/e",                                 "/\<a href\=\"space\.php\?(uid\=(\d+)|username\=([^&]+?))\"([^\>]*)\>/e"                                 );                         $replacearray = array                                 (                                 //"<a href=\"index.html\">",                                 "rewrite_forum('\\1', '\\3', '\\4')",                                 "rewrite_thread('\\1', '\\5', '\\3', '\\6')",                                 "rewrite_profile('\\2', '\\3', '\\4')",                                 "rewrite_space('\\2', '\\3', '\\4')"                                 );                 }                 $content = preg_replace($searcharray, $replacearray, ob_get_contents());                 ob_end_clean();                 $GLOBALS['gzipcompress'] ? ob_start('ob_gzhandler') : ob_start();                 echo $content;         }         if($ftp['connid']) {                 @ftp_close($ftp['connid']);         }         $ftp = array();         if(defined('CACHE_FILE') && CACHE_FILE && !defined('CACHE_FORBIDDEN')) {                 global $cachethreaddir;                 if(diskfreespace(DISCUZ_ROOT.'./'.$cachethreaddir) > 1000000) {                         $fp = fopen(CACHE_FILE, 'w');                         if($fp) {                                 flock($fp, LOCK_EX);                                 fwrite($fp, empty($content) ? ob_get_contents() : $content);                         }                         @fclose($fp);                 }         } } 複製內容到剪貼板代碼: /**這一段都是rewrite規則，和上一個函數相映成趣~ * @para int $tid 帖子的id * @para int $page 頁數 * @para int $prevpage 上一頁 * @para string $extra 附加的東東 * * @return string 返回一個連接，如: <a href = "thread-1-1.html"> */ function rewrite_thread($tid, $page = 0, $prevpage = 0, $extra = '') {         return '<a href="thread-'.$tid.'-'.($page ? $page : 1).'-'.($prevpage ? $prevpage : 1).'.html"'.stripslashes($extra).'>'; } function rewrite_forum($fid, $page = 0, $extra = '') {         return '<a href="forum-'.$fid.'-'.($page ? $page : 1).'.html"'.stripslashes($extra).'>'; } function rewrite_profile($uid, $username, $extra = '') {         return '<a href="profile-'.($uid ? 'uid-'.$uid : 'username-'.$username).'.html"'.stripslashes($extra).'>'; } function rewrite_space($uid, $username, $extra = '') {         return '<a href="space-'.($uid ? 'uid-'.$uid : 'username-'.$username).'.html"'.stripslashes($extra).'>'; } 複製內容到剪貼板代碼: /** * 訪問時段檢查 * @para string $periods 容許訪問的時段 * @para string showmessage 若是不容許訪問的時段會員訪問了的話出現的自定義提示 * * @return TRUE or no return */ function periodscheck($periods, $showmessage = 1) {         global $timestamp, $disableperiodctrl, $_DCACHE, $banperiods;         if(!$disableperiodctrl && $_DCACHE['settings'][$periods]) {                 $now = gmdate('G.i', $timestamp + $_DCACHE['settings']['timeoffset'] * 3600);                 foreach(explode("\r\n", str_replace(':', '.', $_DCACHE['settings'][$periods])) as $period) {                         list($periodbegin, $periodend) = explode('-', $period);                         if(($periodbegin > $periodend && ($now >= $periodbegin || $now < $periodend)) || ($oeriodbegin < $periodend && $now >= $periodbegin && $now < $periodend)) {                                 $banperiods = str_replace("\r\n", ', ', $_DCACHE['settings'][$periods]);                                 if($showmessage) {                                         showmessage('period_nopermission', NULL, 'NOPERM');                                 } else {                                         return TRUE;                                 }                         }                 }         }         return FALSE; } 複製內容到剪貼板代碼: /** * 加密安全提問的，MD5加密 * @para int $qestionid * @para string $anser * * @return string 返回加密後的字串 */ function quescrypt($questionid, $answer) {         return $questionid > 0 && $answer != '' ? substr(md5($answer.md5($questionid)), 16, 8) : ''; } 複製內容到剪貼板代碼: /** * 生成隨機數(這裏返回$hash名字有點點不合適，hash是包含key和value的，這裏沒有這樣的意思) * @para int $length 要生成的長度 * @para int $numeric 傳入一個非零的數表示要生成的全是數字 * * @return string 返回生成的字串 */ function random($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; } 複製內容到剪貼板代碼: /** * 刪除目錄和文件用的 * @para string $dirname 要刪除的目錄名 * @para boolean $keepdir 是否在刪除文件後保留目錄，也就是隻清空目錄 * * @return boolean */ function removedir($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; } 複製內容到剪貼板代碼: /** * 發信件用的，用到了include目錄下的sendmail.inc.php * @para string $email_to * @para string $email_subject * @para string $email_message * @para string $email_from */ function sendmail($email_to, $email_subject, $email_message, $email_from = '') {         extract($GLOBALS, EXTR_SKIP);         require DISCUZ_ROOT.'./include/sendmail.inc.php'; } 複製內容到剪貼板代碼: /** * 發送PM的函數 * @para int $toid 對方id * @para string $subject PM主題 * @para int $fromid 發送方id * @para string $from 發送方用戶名 */ function sendpm($toid, $subject, $message, $fromid = '', $from = '') {         extract($GLOBALS, EXTR_SKIP);         include language('pms');         if(isset($language[$subject])) {                 eval("\$subject = addslashes(\"".$language[$subject]."\");");         }         if(isset($language[$message])) {                 eval("\$message = addslashes(\"".$language[$message]."\");");         }         if(!$fromid && !$from) {                 $fromid = $discuz_uid;                 $from = $discuz_user;         }         $pmids = array();         foreach(explode(',', $toid) as $uid) {                 if(is_numeric($uid)) {                         $query = $db->query("INSERT INTO {$tablepre}pms (msgfrom, msgfromid, msgtoid, folder, new, subject, dateline, message)                                 VALUES ('$from', '$fromid', '$uid', 'inbox', '1', '$subject', '$timestamp', '$message')");                         if($query) {                                 $pmids[] = $uid;                         }                 }         }         if($toid = implodeids($pmids)) {                 $db->query("UPDATE {$tablepre}members SET newpm='1' WHERE uid IN ($toid)");         } } /** * 你們熟悉的showmesage終於出現~！包含了ajax效果了 * @para string $message 顯示在跳轉頁面的信息，好比：您已成功登錄…… * @para string $url_forword 下一個url，過三秒會自動跳轉過去 * @para string $extra 這個用來控制一些特殊的顯示，好比：HALTED, NOPERM，這樣能夠控制一些特殊場合，Discuz想得真是太全面了~！ */ function showmessage($message, $url_forward = '', $extra = '') {         extract($GLOBALS, EXTR_SKIP);         global $extrahead, $discuz_action, $debuginfo, $seccode, $fid, $tid, $supe_fromsupesite, $supe_jumpurl, $supe, $charset, $show_message, $_DCACHE;         $supe_messagetpl = $supe_error = '';         $show_message = $message;         $msgforward = unserialize($_DCACHE['settings']['msgforward']);         $msgforward['refreshtime'] = intval($msgforward['refreshtime']);         $url_forward = empty($url_forward) ? '' : (empty($_DCOOKIE['sid']) && $transsidstatus ? transsid($url_forward) : $url_forward);         if($supe_fromsupesite && $supe['status']) {                 $supe_messagetpl = 'supesite_';                 $extra = '';                 $supe_error = $url_forward ? false : true;                 $url_forward = !empty($supe_jumpurl) && !$supe_error ? urldecode($supe_jumpurl) : $url_forward;         } elseif($url_forward && empty($_GET['inajax']) && $msgforward['quick'] && $msgforward['messages'] && @in_array($message, $msgforward['messages'])) {                 updatesession();                 dheader("location: ".str_replace('&amp;', '&', $url_forward));         }         if(in_array($extra, array('HALTED', 'NOPERM'))) {                 $fid = $tid = 0;                 $discuz_action = 254;         } else {                 $discuz_action = 255;         }         include language('messages'); //把message這個語言包加了進來         if(isset($language[$message])) {                 $supe_pre = $supe_fromsupesite ? 'supe_' : '';                 eval("\$show_message = \"".($language[$supe_pre.$message] ? $language[$supe_pre.$message] : $language[$message])."\";");                 unset($supe_pre);         }         ajaxtemplate('showmessage_ajax');         $extrahead .= $url_forward ? '<meta http-equiv="refresh" content="'.$msgforward['refreshtime'].' url='.$url_forward.'">' : '';         if($advlist = $advlist['redirect']) {                 foreach($advlist AS $type => $redirectadvs) {                         $advlist[$type] = $redirectadvs[array_rand($redirectadvs)];                 }         }         if($extra == 'NOPERM' && !$passport_status) {                 //get secure code checking status (pos. -2)                 if($seccodecheck = substr(sprintf('%05b', $seccodestatus), -2, 1)) {                         $seccode = random(6, 1) + $seccode{0} * 1000000;                 }                 include template('nopermission');         } else {                 include template($supe_messagetpl.'showmessage');         }         dexit(); }