Discuz!常用函数解析（3）-白红宇

Discuz!常用函数解析（3）

阅读量：4197 次

发布时间：2019-05-26

本文共 6323 字，大约阅读时间需要 21 分钟。

<?php

/**

* 刷新重定向

function dreferer($default = '') {

global $referer, $indexname;

$default = empty($default) ? $indexname : '';

if(empty($referer) && isset($GLOBALS['_SERVER']['HTTP_REFERER'])) {

$referer = preg_replace("/([\?&])((sid\=[a-z0-9]{6})(&|$))/i", '\\1', $GLOBALS['_SERVER']['HTTP_REFERER']);

$referer = substr($referer, -1) == '?' ? substr($referer, 0, -1) : $referer;

} else {

$referer = dhtmlspecialchars($referer);

}

if(!preg_match("/(\.php|[a-z]+(\-\d+)+\.html)/", $referer) || strpos($referer, 'logging.php')) {

$referer = $default;

}

return $referer;

}

/**

* 设置cookie

* @param $var - 变量名

* @param $value - 变量值

* @param $life - 生命期

* @param $prefix - 前缀

function dsetcookie($var, $value, $life = 0, $prefix = 1) {

global $cookiepre, $cookiedomain, $cookiepath, $timestamp, $_SERVER;

setcookie(($prefix ? $cookiepre : '').$var, $value,

$life ? $timestamp + $life : 0, $cookiepath,

$cookiedomain, $_SERVER['SERVER_PORT'] == 443 ? 1 : 0);

}

function dunlink($filename, $havethumb = 0, $remote = 0) {

global $authkey, $ftp, $attachdir;

if($remote) {

require_once DISCUZ_ROOT.'./include/ftp.func.php';

if(!$ftp['connid']) {

if(!($ftp['connid'] = dftp_connect($ftp['host'], $ftp['username'], authcode($ftp['password'], 'DECODE', md5($authkey)), $ftp['attachdir'], $ftp['port'], $ftp['ssl']))) {

return;

}

dftp_delete($ftp['connid'], $filename);

$havethumb && dftp_delete($ftp['connid'], $filename.'.thumb.jpg');

} else {

@unlink($attachdir.'/'.$filename);

$havethumb && @unlink($attachdir.'/'.$filename.'.thumb.jpg');

}

/**

* 格式化email

* @param $email - 邮箱地址

* @param $tolink - 是否增加链接

* @return 返回代码

function emailconv($email, $tolink = 1) {

$email = str_replace(array(, '.'), array(, '.'), $email);

return $tolink ? '<a href="mailto: '.$email.'">'.$email.'</a>': $email;

}

/**

* 系统错误日志

* @param $type - 信息类型

* @param $message - 信息

* @param $halt - 是否退出

function errorlog($type, $message, $halt = 1) {

global $timestamp, $discuz_userss, $onlineip, $_SERVER;

$user = empty($discuz_userss) ? '' : $discuz_userss.'<br />';

$user .= $onlineip.'|'.$_SERVER['REMOTE_ADDR'];

writelog('errorlog', dhtmlspecialchars("$timestamp\t$type\t$user\t".str_replace(array("\r", "\n"), array(' ', ' '), trim($message))));

if($halt) {

exit();

}

/**

* 去掉文件扩展名

* @param $finename - 文件名称

* @return 文件名

function fileext($filename) {

return trim(substr(strrchr($filename, '.'), 1, 10));

}

/**

* 产生form防伪码

function formhash($specialadd = '') {

global $discuz_user, $discuz_uid, $discuz_pw, $timestamp, $discuz_auth_key;

$hashadd = defined('IN_ADMINCP') ? 'Only For Discuz! Admin Control Panel' : '';

return substr(md5(substr($timestamp, 0, -7).$discuz_user.$discuz_uid.$discuz_pw.$discuz_auth_key.$hashadd.$specialadd), 8, 8);

}

/**

* 论坛权限

* @param $permstr - 权限信息

* @return 0 无权限 > 0 有权限

function forumperm($permstr) {

global $groupid, $extgroupids;

$groupidarray = array($groupid);

foreach(explode("\t", $extgroupids) as $extgroupid) {

if($extgroupid = intval(trim($extgroupid))) {

$groupidarray[] = $extgroupid;

}

return preg_match("/(^|\t)(".implode('|', $groupidarray).")(\t|$)/", $permstr);

}

/**

权限表达式

* @param $formula - 权限表达式

* @param $type - 0 论坛权限验证 1 勋章权限验证 2 返回勋章权限字串

function formulaperm($formula, $type = 0) {

global $_DSESSION, $extcredits, $formulamessage, $usermsg, $forum, $language;

if((!$formula || $_DSESSION['adminid'] == 1 || $forum['ismoderator']) && !$type) {

return;

}

$formula = unserialize($formula);$formula = $formula[1];

if(!$formula) {

return;

}

@eval("\$formulaperm = ($formula) ? TRUE : FALSE;");

if(!$formulaperm || $type == 2) {

include_once language('misc');

$search = array('$_DSESSION[\'digestposts\']', '$_DSESSION[\'posts\']', '$_DSESSION[\'oltime\']', '$_DSESSION[\'pageviews\']');

$replace = array($language['formulaperm_digestposts'], $language['formulaperm_posts'], $language['formulaperm_oltime'], $language['formulaperm_pageviews']);

for($i = 1; $i <= 8; $i++) {

$search[] = '$_DSESSION[\'extcredits'.$i.'\']';

$replace[] = $extcredits[$i]['title'] ? $extcredits[$i]['title'] : $language['formulaperm_extcredits'].$i;

}

$i = 0;$usermsg = '';

foreach($search as $s) {

$usermsg .= strexists($formula, $s) ? $replace[$i].' = '.(@eval('return intval('.$s.');')).' ' : '';

$i++;

}

$search = array_merge($search, array('and', 'or', '>=', '<='));

$replace = array_merge($replace, array(' '.$language['formulaperm_and'].' ', ' '.$language['formulaperm_or'].' ', '≥', '≤'));

$formulamessage = str_replace($search, $replace, $formula);

if($type == 1) {

showmessage('medal_permforum_nopermission', NULL, 'NOPERM');

} elseif($type == 2) {

return $formulamessage;

} else {

showmessage('forum_permforum_nopermission', NULL, 'NOPERM');

}

return TRUE;

}

/**

* 获取用户所在组

* @param $uid - 用户组

* @param $group - 用户组

* @param $member - 用户组

function getgroupid($uid, $group, &$member) {

global $creditsformula, $db, $tablepre;

if(!empty($creditsformula)) {

$updatearray = array();

eval("\$credits = round($creditsformula);");

if($credits != $member['credits']) {

$updatearray[] = "credits='$credits'";

$member['credits'] = $credits;

}

if($group['type'] == 'member' && !($member['credits'] >= $group['creditshigher'] && $member['credits'] < $group['creditslower'])) {

$query = $db->query("SELECT groupid FROM {$tablepre}usergroups WHERE type='member' AND $member[credits]>=creditshigher AND $member[credits]<creditslower LIMIT 1");

if($db->num_rows($query)) {

$member['groupid'] = $db->result($query, 0);

$updatearray[] = "groupid='$member[groupid]'";

}

if($updatearray) {

$db->query("UPDATE {$tablepre}members SET ".implode(', ', $updatearray)." WHERE uid='$uid'");

}

return $member['groupid'];

}

function getrobot() {

if(!defined('IS_ROBOT')) {

$kw_browsers = 'MSIE|Netscape|Opera|Konqueror|Mozilla';