DedeV6/src/system/dedetag.class.php

<?php
if (!defined('DEDEINC')) exit ('dedebiz');
/**
 * 主题模板
 *
 * @version        $id:dedetag.class.php 10:33 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
 */
class DedeTag
{
    var $IsReplace = FALSE; //标记是否已被替代，供解析器使用
    var $TagName = '';      //标记名称
    var $InnerText = '';    //标记之间的文本
    var $StartPos = 0;      //标记起始位置
    var $EndPos = 0;        //标记结束位置
    var $CAttribute = null; //标记属性描述，即是class DedeAttribute
    var $TagValue = '';     //标记的值
    var $TagID = 0;
    /**
     *  获取标记的名称和值
     *
     * @access    public
     * @return    string
     */
    function GetName()
    {
        return strtolower($this->TagName);
    }
    /**
     *  获取值
     *
     * @access    public
     * @return    string
     */
    function GetValue()
    {
        return $this->TagValue;
    }
    //下面两个成员函数仅是为了兼容旧版
    function GetTagName()
    {
        return strtolower($this->TagName);
    }
    function GetTagValue()
    {
        return $this->TagValue;
    }
    //获取标记的指定属性
    function IsAttribute($str)
    {
        return $this->CAttribute->IsAttribute($str);
    }
    function GetAttribute($str)
    {
        return $this->CAttribute->GetAtt($str);
    }
    function GetAtt($str)
    {
        return $this->CAttribute->GetAtt($str);
    }
    function GetInnerText()
    {
        return $this->InnerText;
    }
}
/**
 * DedeTagParse模板类
 * function c____DedeTagParse();
 *
 * @package          DedeTagParse
 * @subpackage       DedeBIZ.Libraries
 * @link             https://www.dedebiz.com
 */
class DedeTagParse
{
    var $NameSpace = 'dede';   //标记的名字空间
    var $TagStartWord = '{';   //标记起始
    var $TagEndWord = '}';     //标记结束
    var $TagMaxLen = 64;       //标记名称的最大值
    var $CharToLow = TRUE;     //TRUE表示对属性和标记名称不区分大小写
    var $IsCache = FALSE;      //是否使用缓冲
    var $TempMkTime = 0;
    var $CacheFile = '';
    var $SourceString = '';    //模板字符串
    var $CTags = array();      //标记集合
    var $Count = -1;           //$Tags标记个数
    var $refObj = '';          //引用当前模板类的对象
    var $taghashfile = '';
    function __construct()
    {
        if (!isset($GLOBALS['cfg_tplcache'])) {
            $GLOBALS['cfg_tplcache'] = 'N';
        }
        if ($GLOBALS['cfg_tplcache'] == 'Y') {
            $this->IsCache = TRUE;
        } else {
            $this->IsCache = FALSE;
        }
        if (DEDE_ENVIRONMENT == 'development') {
            $this->IsCache = FALSE;
        }
        $this->NameSpace = 'dede';
        $this->TagStartWord = '{';
        $this->TagEndWord = '}';
        $this->TagMaxLen = 64;
        $this->CharToLow = TRUE;
        $this->SourceString = '';
        $this->CTags = array();
        $this->Count = -1;
        $this->TempMkTime = 0;
        $this->CacheFile = '';
    }
    function DedeTagParse()
    {
        $this->__construct();
    }
    /**
     *  设置标记的命名空间，默认为dede
     *
     * @access    public
     * @param     string   $str   字符串
     * @param     string   $s   开始标记
     * @param     string   $e   结束标记
     * @return    void
     */
    function SetNameSpace($str, $s = "{", $e = "}")
    {
        $this->NameSpace = strtolower($str);
        $this->TagStartWord = $s;
        $this->TagEndWord = $e;
    }
    /**
     *  重置成员变量或Clear
     *
     * @access    public
     * @return    void
     */
    function SetDefault()
    {
        $this->SourceString = '';
        $this->CTags = array();
        $this->Count = -1;
    }
    /**
     *  强制引用
     *
     * @access    public
     * @param     object  $refObj  隶属对象
     * @return    void
     */
    function SetRefObj(&$refObj)
    {
        $this->refObj = $refObj;
    }
    function GetCount()
    {
        return $this->Count + 1;
    }
    function Clear()
    {
        $this->SetDefault();
    }
    /**
     * CheckDisabledFunctions COMMENT : CheckDisabledFunctions检查是否存在禁止的函数
     *
     * @access    public
     * @param    string
     * @return    bool
     */
    function CheckDisabledFunctions($str, &$errmsg = '')
    {
        global $cfg_disable_funs;
        $cfg_disable_funs = isset($cfg_disable_funs) ? $cfg_disable_funs : 'phpinfo,eval,exec,passthru,shell_exec,system,proc_open,popen,curl_exec,curl_multi_exec,parse_ini_file,show_source,file_put_contents,fsockopen,fopen,fwrite';
        //模板引擎添加disable_functions
        if (defined('DEDEDISFUN')) {
            $tokens = token_get_all_nl('<?php'.$str."\n\r?>");
            $disabled_functions = explode(',', $cfg_disable_funs);
            foreach ($tokens as $token) {
                if (is_array($token)) {
                    if ($token[0] = '306' && in_array($token[1], $disabled_functions)) {
                        $errmsg = 'DedeBIZ Error:function disabled "'.$token[1].'" <a href="https://www.dedebiz.com/help" target="_blank">more</a>';
                        return FALSE;
                    }
                }
            }
        }
        return TRUE;
    }
    /**
     *  检测模板缓存
     *
     * @access    public
     * @param     string   $filename  文件名称
     * @return    string
     */
    function LoadCache($filename)
    {
        global $cfg_tplcache, $cfg_tplcache_dir;
        if (!$this->IsCache) {
            return FALSE;
        }
        $cdir = dirname($filename);
        $cachedir = DEDEROOT.$cfg_tplcache_dir;
        $ckfile = str_replace($cdir, '', $filename).substr(md5($filename), 0, 16).'.inc';
        $ckfullfile = $cachedir.'/'.$ckfile;
        $ckfullfile_t = $cachedir.'/'.$ckfile.'.txt';
        $this->CacheFile = $ckfullfile;
        $this->TempMkTime = filemtime($filename);
        if (!file_exists($ckfullfile) || !file_exists($ckfullfile_t)) {
            return FALSE;
        }
        //检测模板最后更新时间
        $fp = fopen($ckfullfile_t, 'r');
        $time_info = trim(fgets($fp, 64));
        fclose($fp);
        if ($time_info != $this->TempMkTime) {
            return FALSE;
        }
        //引入缓冲数组
        include($this->CacheFile);
        $errmsg = '';
        //把缓冲数组文档读入类
        if (isset($z) && is_array($z)) {
            foreach ($z as $k => $v) {
                $this->Count++;
                $ctag = new DedeTAg();
                $ctag->CAttribute = new DedeAttribute();
                $ctag->IsReplace = FALSE;
                $ctag->TagName = $v[0];
                $ctag->InnerText = $v[1];
                $ctag->StartPos = $v[2];
                $ctag->EndPos = $v[3];
                $ctag->TagValue = '';
                $ctag->TagID = $k;
                if (isset($v[4]) && is_array($v[4])) {
                    $i = 0;
                    $ctag->CAttribute->Items = array();
                    foreach ($v[4] as $k => $v) {
                        $ctag->CAttribute->Count++;
                        $ctag->CAttribute->Items[$k] = $v;
                    }
                }
                $this->CTags[$this->Count] = $ctag;
            }
        } else {
            //模板没有缓冲数组
            $this->CTags = '';
            $this->Count = -1;
        }
        return TRUE;
    }
    /**
     *  写入缓存
     *
     * @access    public
     * @param     string
     * @return    string
     */
    function SaveCache()
    {
        if (!empty($this->CacheFile)) {
            $fp = fopen($this->CacheFile.'.txt', "w");
            fwrite($fp, $this->TempMkTime."\n");
            fclose($fp);
            $fp = fopen($this->CacheFile, "w");
            flock($fp, 3);
            fwrite($fp, '<'.'?php'."\r\n");
            $errmsg = '';
            if (is_array($this->CTags)) {
                foreach ($this->CTags as $tid => $ctag) {
                    $arrayValue = 'Array("'.$ctag->TagName.'",';
                    if (!$this->CheckDisabledFunctions($ctag->InnerText, $errmsg)) {
                        fclose($fp);
                        @unlink($this->taghashfile);
                        @unlink($this->CacheFile);
                        @unlink($this->CacheFile.'.txt');
                        die($errmsg);
                    }
                    $arrayValue .= '"'.str_replace('$', '\$', str_replace("\r", "\\r", str_replace("\n", "\\n", str_replace('"', '\"', str_replace("\\", "\\\\", $ctag->InnerText))))).'"';
                    $arrayValue .= ",{$ctag->StartPos},{$ctag->EndPos});";
                    fwrite($fp, "\$z[$tid]={$arrayValue}\n");
                    if (is_array($ctag->CAttribute->Items)) {
                        fwrite($fp, "\$z[$tid][4]=array();\n");
                        foreach ($ctag->CAttribute->Items as $k => $v) {
                            $v = str_replace("\\", "\\\\", $v);
                            $v = str_replace('"', "\\".'"', $v);
                            $v = str_replace('$', '\$', $v);
                            $k = trim(str_replace("'", "", $k));
                            if ($k == "") {
                                continue;
                            }
                            if ($k != 'tagname') {
                                fwrite($fp, "\$z[$tid][4]['$k']=\"$v\";\n");
                            }
                        }
                    }
                }
            }
            fwrite($fp, "\n".'?'.'>');
            fclose($fp);
        }
    }
    /**
     *  载入模板文件
     *
     * @access    public
     * @param     string   $filename  文件名称
     * @return    string
     */
    function LoadTemplate($filename)
    {
        $this->SetDefault();
        if (!file_exists($filename)) {
            $this->SourceString = " $filename Not Found! ";
            $this->ParseTemplet();
        } else {
            $fp = @fopen($filename, "r");
            while ($line = fgets($fp, 1024)) {
                $this->SourceString .= $line;
            }
            fclose($fp);
            if ($this->LoadCache($filename)) {
                return '';
            } else {
                $this->ParseTemplet();
            }
        }
    }
    //仅用于兼容旧版本
    function LoadTemplet($filename)
    {
        $this->LoadTemplate($filename);
    }
    //仅用于兼容旧版本
    function LoadFile($filename)
    {
        $this->LoadTemplate($filename);
    }
    /**
     *  载入模板字符串
     *
     * @access    public
     * @param     string  $str  字符串
     * @return    void
     */
    function LoadSource($str)
    {
        //优化模板字符串存取读取方式
        $this->taghashfile = $filename = DEDEDATA.'/tplcache/'.md5($str).'.inc';
        if (!is_file($filename)) {
            file_put_contents($filename, $str);
        }
        $this->LoadTemplate($filename);
    }
    function LoadString($str)
    {
        $this->LoadSource($str);
    }
    /**
     *  获得指定名称的Tag的id，如果有多个同名的Tag，则取没有被取代为文档的第一个Tag
     *
     * @access    public
     * @param     string  $str  字符串
     * @return    int
     */
    function GetTagID($str)
    {
        if ($this->Count == -1) {
            return -1;
        }
        if ($this->CharToLow) {
            $str = strtolower($str);
        }
        foreach ($this->CTags as $id => $CTag) {
            if ($CTag->TagName == $str && !$CTag->IsReplace) {
                return $id;
                break;
            }
        }
        return -1;
    }
    /**
     *  获得指定名称的CTag数据类，如果有多个同名的Tag，则取没有被分配文档的第一个Tag
     *
     * @access    public
     * @param     string  $str  字符串
     * @return    mixed
     */
    function GetTag($str)
    {
        if ($this->Count == -1) {
            return '';
        }
        if ($this->CharToLow) {
            $str = strtolower($str);
        }
        foreach ($this->CTags as $id => $CTag) {
            if ($CTag->TagName == $str && !$CTag->IsReplace) {
                return $CTag;
                break;
            }
        }
        return '';
    }
    /**
     *  通过名称获取标记
     *
     * @access    public
     * @param     string  $str  字符串
     * @return    string
     */
    function GetTagByName($str)
    {
        return $this->GetTag($str);
    }
    /**
     *  获得指定id的CTag数据类
     *
     * @access    public
     * @param     string  标签id
     * @return    string
     */
    function GetTagByID($id)
    {
        if (isset($this->CTags[$id])) {
            return $this->CTags[$id];
        } else {
            return '';
        }
    }
    /**
     *  给_vars数组传递一个元素
     *
     * @access    public
     * @param     string   $vname  标签名
     * @param     string   $vvalue  标签值
     * @return    string
     */
    function AssignVar($vname, $vvalue)
    {
        if (!isset($_sys_globals['define'])) {
            $_sys_globals['define'] = 'yes';
        }
        $_sys_globals[$vname] = $vvalue;
    }
    /**
     *  分配指定id的标记的值
     *
     * @access    public
     * @param     string   $i  标签id
     * @param     string  $str  字符串
     * @param     string  $runfunc  运行函数
     * @return    void
     */
    function Assign($i, $str, $runfunc = TRUE)
    {
        if (isset($this->CTags[$i])) {
            $this->CTags[$i]->IsReplace = TRUE;
            $this->CTags[$i]->TagValue = $str;
            if ($this->CTags[$i]->GetAtt('function') != '' && $runfunc) {
                $this->CTags[$i]->TagValue = $this->EvalFunc($str, $this->CTags[$i]->GetAtt('function'), $this->CTags[$i]);
            }
        }
    }
    /**
     *  分配指定名称的标记的值，如果标记包含属性，请不要用此函数
     *
     * @access    public
     * @param     string  $tagname  标签名称
     * @param     string  $str  字符串
     * @return    void
     */
    function AssignName($tagname, $str)
    {
        foreach ($this->CTags as $id => $CTag) {
            if ($CTag->TagName == $tagname) {
                $this->Assign($id, $str);
            }
        }
    }
    /**
     *  处理特殊标记
     *
     * @access    public
     * @return    void
     */
    function AssignSysTag()
    {
        global $_sys_globals;
        for ($i = 0; $i <= $this->Count; $i++) {
            $CTag = $this->CTags[$i];
            $str = '';
            //获取一个外部变量
            if ($CTag->TagName == 'global') {
                $str = $this->GetGlobals($CTag->GetAtt('name'));
                if ($this->CTags[$i]->GetAtt('function') != '') {
                    //$str = $this->EvalFunc( $this->CTags[$i]->TagValue, $this->CTags[$i]->GetAtt('function'),$this->CTags[$i] );
                    $str = $this->EvalFunc($str, $this->CTags[$i]->GetAtt('function'), $this->CTags[$i]);
                }
                $this->CTags[$i]->IsReplace = TRUE;
                $this->CTags[$i]->TagValue = $str;
            }
            //引入静态文件
            else if ($CTag->TagName == 'include') {
                $filename = ($CTag->GetAtt('file') == '' ? $CTag->GetAtt('filename') : $CTag->GetAtt('file'));
                $str = $this->IncludeFile($filename, $CTag->GetAtt('ismake'));
                $this->CTags[$i]->IsReplace = TRUE;
                $this->CTags[$i]->TagValue = $str;
            }
            //循环一个普通数组
            else if ($CTag->TagName == 'foreach') {
                $arr = $this->CTags[$i]->GetAtt('array');
                if (isset($GLOBALS[$arr])) {
                    foreach ($GLOBALS[$arr] as $k => $v) {
                        $istr = '';
                        $istr .= preg_replace("/\[field:key([\r\n\t\f ]+)\/\]/is", $k, $this->CTags[$i]->InnerText);
                        $str .= preg_replace("/\[field:value([\r\n\t\f ]+)\/\]/is", $v, $istr);
                    }
                }
                $this->CTags[$i]->IsReplace = TRUE;
                $this->CTags[$i]->TagValue = $str;
            }
            //设置获取变量值
            else if ($CTag->TagName == 'var') {
                $vname = $this->CTags[$i]->GetAtt('name');
                if ($vname == '') {
                    $str = '';
                } else if ($this->CTags[$i]->GetAtt('value') != '') {
                    $_vars[$vname] = $this->CTags[$i]->GetAtt('value');
                } else {
                    $str = (isset($_vars[$vname]) ? $_vars[$vname] : '');
                }
                $this->CTags[$i]->IsReplace = TRUE;
                $this->CTags[$i]->TagValue = $str;
            }
            //运行PHP接口
            if ($CTag->GetAtt('runphp') == 'yes') {
                $this->RunPHP($CTag, $i);
            }
            if (is_array($this->CTags[$i]->TagValue)) {
                $this->CTags[$i]->TagValue = 'array';
            }
        }
    }
    //运行PHP代码
    function RunPHP(&$refObj, $i)
    {
        $DedeMeValue = $phpcode = '';
        if ($refObj->GetAtt('source') == 'value') {
            $phpcode = $this->CTags[$i]->TagValue;
        } else {
            $DedeMeValue = $this->CTags[$i]->TagValue;
            $phpcode = $refObj->GetInnerText();
        }
        $phpcode = preg_replace("/'@me'|\"@me\"|@me/i", '$DedeMeValue', $phpcode);
        try {
            @eval($phpcode); 
            $this->CTags[$i]->TagValue = $DedeMeValue;
            $this->CTags[$i]->IsReplace = TRUE;
        } catch (Exception $e) {
            //or die("<xmp>$phpcode</xmp>");
        }
        $this->CTags[$i]->TagValue = $DedeMeValue;
        $this->CTags[$i]->IsReplace = TRUE;
    }
    /**
     *  把分析模板输出到一个字符串中，不替换没被处理的值
     *
     * @access    public
     * @return    string
     */
    function GetResultNP()
    {
        $ResultString = '';
        if ($this->Count == -1) {
            return $this->SourceString;
        }
        $this->AssignSysTag();
        $nextTagEnd = 0;
        $strok = '';
        for ($i = 0; $i <= $this->Count; $i++) {
            if ($this->CTags[$i]->GetValue() != "") {
                if ($this->CTags[$i]->GetValue() == '#@Delete@#') {
                    $this->CTags[$i]->TagValue = '';
                }
                $ResultString .= substr($this->SourceString, $nextTagEnd, $this->CTags[$i]->StartPos - $nextTagEnd);
                $ResultString .= $this->CTags[$i]->GetValue();
                $nextTagEnd = $this->CTags[$i]->EndPos;
            }
        }
        $slen = strlen($this->SourceString);
        if ($slen > $nextTagEnd) {
            $ResultString .= substr($this->SourceString, $nextTagEnd, $slen - $nextTagEnd);
        }
        return $ResultString;
    }
    /**
     *  把分析模板输出到一个字符串中并返回
     *
     * @access    public
     * @return    string
     */
    function GetResult()
    {
        $ResultString = '';
        if ($this->Count == -1) {
            return $this->SourceString;
        }
        $this->AssignSysTag();
        $nextTagEnd = 0;
        $strok = '';
        for ($i = 0; $i <= $this->Count; $i++) {
            $ResultString .= substr($this->SourceString, $nextTagEnd, $this->CTags[$i]->StartPos - $nextTagEnd);
            $ResultString .= $this->CTags[$i]->GetValue();
            $nextTagEnd = $this->CTags[$i]->EndPos;
        }
        $slen = strlen($this->SourceString);
        if ($slen > $nextTagEnd) {
            $ResultString .= substr($this->SourceString, $nextTagEnd, $slen - $nextTagEnd);
        }
        return $ResultString;
    }
    /**
     *  直接解析模板
     *
     * @access    public
     * @return    void
     */
    function Display()
    {
        echo $this->GetResult();
    }
    /**
     *  解析模板为文件
     *
     * @access    public
     * @param     string   $filename  要保存到的文件
     * @return    string
     */
    function SaveTo($filename)
    {
        $fp = @fopen($filename, "w") or die("请检查栏目生成目录是否填写正确，目录文件是否存在");
        fwrite($fp, $this->GetResult());
        fclose($fp);
    }
    /**
     *  解析模板
     *
     * @access    public
     * @return    string
     */
    function ParseTemplet()
    {
        $TagStartWord = $this->TagStartWord;
        $TagEndWord = $this->TagEndWord;
        $sPos = 0;
        $ePos = 0;
        $FullTagStartWord =  $TagStartWord.$this->NameSpace.":";
        $sTagEndWord =  $TagStartWord."/".$this->NameSpace.":";
        $eTagEndWord = "/".$TagEndWord;
        $tsLen = strlen($FullTagStartWord);
        $sourceLen = strlen($this->SourceString);
        if ($sourceLen <= ($tsLen + 3)) {
            return;
        }
        $cAtt = new DedeAttributeParse();
        $cAtt->charToLow = $this->CharToLow;
        //遍历模板字符串，请取标记及其属性信息
        for ($i = 0; $i < $sourceLen; $i++) {
            $tTagName = '';
            //如果不进行此判断，无法识别相连的两个标记
            if ($i - 1 >= 0) {
                $ss = $i - 1;
            } else {
                $ss = 0;
            }
            $sPos = strpos($this->SourceString, $FullTagStartWord, $ss);
            $isTag = $sPos;
            if ($i == 0) {
                $headerTag = substr($this->SourceString, 0, strlen($FullTagStartWord));
                if ($headerTag == $FullTagStartWord) {
                    $isTag = TRUE;
                    $sPos = 0;
                }
            }
            if ($isTag === FALSE) {
                break;
            }
            //判断是否已经到倒数第三个字符可能性几率极小，取消此逻辑
            for ($j = ($sPos + $tsLen); $j < ($sPos + $tsLen + $this->TagMaxLen); $j++) {
                if ($j > ($sourceLen - 1)) {
                    break;
                } else if (preg_match("/[\/ \t\r\n]/", $this->SourceString[$j]) || $this->SourceString[$j] == $this->TagEndWord) {
                    break;
                } else {
                    $tTagName .= $this->SourceString[$j];
                }
            }
            if ($tTagName != '') {
                $i = $sPos + $tsLen;
                $endPos = -1;
                $fullTagEndWordThis = $sTagEndWord.$tTagName.$TagEndWord;
                $e1 = strpos($this->SourceString, $eTagEndWord, $i);
                $e2 = strpos($this->SourceString, $FullTagStartWord, $i);
                $e3 = strpos($this->SourceString, $fullTagEndWordThis, $i);
                $e1 = trim($e1);
                $e2 = trim($e2);
                $e3 = trim($e3);
                $e1 = ($e1 == '' ? '-1' : $e1);
                $e2 = ($e2 == '' ? '-1' : $e2);
                $e3 = ($e3 == '' ? '-1' : $e3);
                if ($e3 == -1) {
                    $endPos = $e1;
                    $elen = $endPos + strlen($eTagEndWord);
                } else if ($e1 == -1) {
                    $endPos = $e3;
                    $elen = $endPos + strlen($fullTagEndWordThis);
                } else {
                    if ($e1 < $e3) {
                        $endPos = $e3;
                        $elen = $endPos + strlen($fullTagEndWordThis);
                    } elseif ($e1 < $e2) {
                        $endPos = $e1;
                        $elen = $endPos + strlen($eTagEndWord);
                    } else {
                        $endPos = $e3;
                        $elen = $endPos + strlen($fullTagEndWordThis);
                    }
                }
                if ($endPos == -1) {
                    echo "Tag Character postion $sPos, '$tTagName' Error<br>\r\n";
                    break;
                }
                $i = $elen;
                $ePos = $endPos;
                //分析所找到的标记位置等信息
                $attStr = '';
                $innerText = '';
                $startInner = 0;
                for ($j = ($sPos + $tsLen); $j < $ePos; $j++) {
                    if ($startInner == 0 && ($this->SourceString[$j] == $TagEndWord && $this->SourceString[$j - 1] != "\\")) {
                        $startInner = 1;
                        continue;
                    }
                    if ($startInner == 0) {
                        $attStr .= $this->SourceString[$j];
                    } else {
                        $innerText .= $this->SourceString[$j];
                    }
                }
                //echo "<xmp>$attStr</xmp>\r\n";
                $cAtt->SetSource($attStr);
                if ($cAtt->cAttributes->GetTagName() != '') {
                    $this->Count++;
                    $CDTag = new DedeTag();
                    $CDTag->TagName = $cAtt->cAttributes->GetTagName();
                    $CDTag->StartPos = $sPos;
                    $CDTag->EndPos = $i;
                    $CDTag->CAttribute = $cAtt->cAttributes;
                    $CDTag->IsReplace = FALSE;
                    $CDTag->TagID = $this->Count;
                    $CDTag->InnerText = $innerText;
                    $this->CTags[$this->Count] = $CDTag;
                }
            } else {
                $i = $sPos + $tsLen;
                break;
            }
        }
        if ($this->IsCache) {
            $this->SaveCache();
        }
    }
    /**
     *  处理某字段的函数
     *
     * @access    public
     * @param     string   $fieldvalue  字段值
     * @param     string   $functionname  函数名称
     * @param     object  $refObj  隶属对象
     * @return    string
     */
    function EvalFunc($fieldvalue, $functionname, &$refObj)
    {
        $DedeFieldValue = $fieldvalue;
        $functionname = str_replace("{\"", "[\"", $functionname);
        $functionname = str_replace("\"}", "\"]", $functionname);
        $functionname = preg_replace("/'@me'|\"@me\"|@me/i", '$DedeFieldValue', $functionname);
        $functionname = "\$DedeFieldValue = ".$functionname;
        try {
            @eval($functionname.";"); 
            if (empty($DedeFieldValue)) {
                return '';
            } else {
                return $DedeFieldValue;
            }
        } catch (Throwable $e) {
            //or die("<xmp>$functionname</xmp>");
            echo DedeAlert('模板存在无法解析的标签，请检查模板标签后更新网站，错误提示：'.$e->getMessage(),ALERT_WARNING);
            return '';
        }
    }
    /**
     *  获得一个外部变量
     *
     * @access    public
     * @param     string   $varname  变量名称
     * @return    string
     */
    function GetGlobals($varname)
    {
        $varname = trim($varname);
        //禁止在模板文件读取数据库密码
        if ($varname == "dbuserpwd" || $varname == "cfg_dbpwd") {
            return "";
        }
        //正常情况
        if (isset($GLOBALS[$varname])) {
            return $GLOBALS[$varname];
        } else {
            return "";
        }
    }
    /**
     *  引入文件
     *
     * @access    public
     * @param     string  $filename  文件名
     * @param     string  $ismake  是否需要编译
     * @return    string
     */
    function IncludeFile($filename, $ismake = 'no')
    {
        global $cfg_df_style;
        $restr = '';
        if ($filename == '') {
            return '';
        }
        if (file_exists(DEDEROOT."/theme/".$filename)) {
            $okfile = DEDEROOT."/theme/".$filename;
        } else if (file_exists(DEDEROOT.'/theme/'.$cfg_df_style.'/'.$filename)) {
            $okfile = DEDEROOT.'/theme/'.$cfg_df_style.'/'.$filename;
        } else {
            return "主题模板不存在：$filename";
        }
        //编译
        if ($ismake != "no") {
            require_once(DEDEINC."/channelunit.func.php");
            $dtp = new DedeTagParse();
            $dtp->LoadTemplet($okfile);
            MakeOneTag($dtp, $this->refObj);
            $restr = $dtp->GetResult();
        } else {
            $fp = @fopen($okfile, "r");
            while ($line = fgets($fp, 1024)) $restr .= $line;
            fclose($fp);
        }
        return $restr;
    }
}
//属性数据描述
class DedeAttribute
{
    var $Count = -1;
    var $Items = array(); //属性元素的集合
    //获得某个属性
    function GetAtt($str)
    {
        if ($str == "") {
            return "";
        }
        if (isset($this->Items[$str])) {
            return $this->Items[$str];
        } else {
            return "";
        }
    }
    //同上
    function GetAttribute($str)
    {
        return $this->GetAtt($str);
    }
    //判断属性是否存在
    function IsAttribute($str)
    {
        if (isset($this->Items[$str])) return TRUE;
        else return FALSE;
    }
    //获得标记名称
    function GetTagName()
    {
        return $this->GetAtt("tagname");
    }
    //获得属性个数
    function GetCount()
    {
        return $this->Count + 1;
    }
}
//属性解析器
class DedeAttributeParse
{
    var $sourceString = '';
    var $sourceMaxSize = 1024;
    var $cAttributes = null;
    var $charToLow = TRUE;
    function SetSource($str = '')
    {
        $this->cAttributes = new DedeAttribute();
        $strLen = 0;
        $this->sourceString = trim(preg_replace("/[ \r\n\t]{1,}/", " ", $str));
        //为了在function内能使用数组，这里允许对[ ]进行转义使用
        $this->sourceString = str_replace('\]', ']', $this->sourceString);
        $this->sourceString = str_replace('[', '[', $this->sourceString);
        $strLen = strlen($this->sourceString);
        if ($strLen > 0 && $strLen <= $this->sourceMaxSize) {
            $this->ParseAttribute();
        }
    }
    //解析属性
    function ParseAttribute()
    {
        $d = '';
        $tmpatt = '';
        $tmpvalue = '';
        $startdd = -1;
        $ddtag = '';
        $hasAttribute = FALSE;
        $strLen = strlen($this->sourceString);
        $this->cAttributes->Items = array();
        //获得Tag的名称，解析到cAtt->GetAtt('tagname')中
        for ($i = 0; $i < $strLen; $i++) {
            if ($this->sourceString[$i] == ' ') {
                $this->cAttributes->Count++;
                $tmpvalues = explode('.', $tmpvalue);
                $this->cAttributes->Items['tagname'] = ($this->charToLow ? strtolower($tmpvalues[0]) : $tmpvalues[0]);
                if (isset($tmpvalues[1]) && $tmpvalues[1] != '') {
                    $this->cAttributes->Items['name'] = $tmpvalues[1];
                }
                $tmpvalue = '';
                $hasAttribute = TRUE;
                break;
            } else {
                $tmpvalue .= $this->sourceString[$i];
            }
        }
        //不存在属性列表的情况
        if (!$hasAttribute) {
            $this->cAttributes->Count++;
            $tmpvalues = explode('.', $tmpvalue);
            $this->cAttributes->Items['tagname'] = ($this->charToLow ? strtolower($tmpvalues[0]) : $tmpvalues[0]);
            if (isset($tmpvalues[1]) && $tmpvalues[1] != '') {
                $this->cAttributes->Items['name'] = $tmpvalues[1];
            }
            return;
        }
        $tmpvalue = '';
        //如果字符串含有属性值，遍历源字符串并获得各属性
        for ($i; $i < $strLen; $i++) {
            $d = $this->sourceString[$i];
            //查找属性名称
            if ($startdd == -1) {
                if ($d != '=') {
                    $tmpatt .= $d;
                } else {
                    if ($this->charToLow) {
                        $tmpatt = strtolower(trim($tmpatt));
                    } else {
                        $tmpatt = trim($tmpatt);
                    }
                    $startdd = 0;
                }
            }
            //查找属性限定标志
            else if ($startdd == 0) {
                switch ($d) {
                    case ' ':
                        break;
                    case '"':
                        $ddtag = '"';
                        $startdd = 1;
                        break;
                    case '\'':
                        $ddtag = '\'';
                        $startdd = 1;
                        break;
                    default:
                        $tmpvalue .= $d;
                        $ddtag = ' ';
                        $startdd = 1;
                        break;
                }
            } else if ($startdd == 1) {
                if ($d == $ddtag && (isset($this->sourceString[$i - 1]) && $this->sourceString[$i - 1] != "\\")) {
                    $this->cAttributes->Count++;
                    $this->cAttributes->Items[$tmpatt] = trim($tmpvalue);
                    $tmpatt = '';
                    $tmpvalue = '';
                    $startdd = -1;
                } else {
                    $tmpvalue .= $d;
                }
            }
        }
        //最后一个属性给值
        if ($tmpatt != '') {
            $this->cAttributes->Count++;
            $this->cAttributes->Items[$tmpatt] = trim($tmpvalue);
        }
    }
}
?>