php模块参考

 <?php
 //数据库连接类
 class ConnDB{

     var $dbtype;
     var $host;
     var $user;
     var $pwd;
     var $dbname;

     //构造方法
     function ConnDB($dbtype,$host,$user,$pwd,$dbname){
         $this->dbtype=$dbtype;
         $this->host=$host;
         $this->user=$user;
         $this->pwd=$pwd;
         $this->dbname=$dbname;
     }

     //实现数据库的连接并返回连接对象
     function GetConnId(){

         if($this->dbtype=="mysql" || $this->dbtype=="mssql"){
             $dsn="$this->dbtype:host=$this->host;dbname=$this->dbname";
         }else{
             $dsn="$this->dbtype:dbname=$this->dbname";
         }
         try {
             $conn = new PDO($dsn, $this->user, $this->pwd);     //初始化一个PDO对象，就是创建了数据库连接对象$pdo
             $conn->query("set names utf8");
             return $conn;
         } catch (PDOException $e) {
             die ("Error!: " . $e->getMessage() . "<br/>");
         }

     }
 }

 //数据库管理类
 class AdminDB{

     function ExecSQL($sqlstr,$conn){

         $sqltype=strtolower(substr(trim($sqlstr),0,6));
         $rs=$conn->prepare($sqlstr);        //准备查询语句
         $rs->execute();                    //执行查询语句，并返回结果集
         if($sqltype=="select"){
             $array=$rs->fetchAll(PDO::FETCH_ASSOC);        //获取结果集中的所有数据
             if(count($array)==0 || $rs==false)
                 return false;
             else
                 return $array;
         }elseif ($sqltype=="update" || $sqltype=="insert" || $sqltype=="delete"){
             if($rs)
                 return true;
             else
                 return false;
         }
     }
 }
 //分页类
 class SepPage{
     var $rs;
     var $pagesize;
     var $nowpage;
     var $array;
     var $conn;
     var $sqlstr;
     function ShowData($sqlstr,$conn,$pagesize,$nowpage){    //定义方法
         if(!isset($nowpage) || $nowpage=="")            //判断变量值是否为空
             $this->nowpage=1;                        //定义每页起始页
         else
             $this->nowpage=$nowpage;
         $this->pagesize=$pagesize;                    //定义每页输出的记录数
         $this->conn=$conn;                            //连接数据库返回的标识
         $this->sqlstr=$sqlstr;                            //执行的查询语句
         $offset=($this->nowpage-1)*$this->pagesize;
         $sql=$this->sqlstr." limit $offset, $this->pagesize";
         $result=$this->conn->prepare($sql);            //准备查询语句
         $result->execute();                        //执行查询语句，并返回结果集
         $this->array=$result->fetchAll(PDO::FETCH_ASSOC);        //获取结果集中的所有数据
         if(count($this->array)==0 || $this->array==false)
             return false;
         else
             return $this->array;
     }

     function ShowPage($contentname,$utits,$anothersearchstr,$anothersearchstrs,$class){
         $str="";
         $res=$this->conn->prepare($this->sqlstr);            //准备查询语句
         $res->execute();                        //执行查询语句，并返回结果集
         $this->array=$res->fetchAll(PDO::FETCH_ASSOC);        //获取结果集中的所有数据
         $record=count($this->array);                //统计记录总数

         $pagecount=ceil($record/$this->pagesize);        //计算共有几页
         $str.=$contentname."&nbsp;".$record."&nbsp;".$utits."&nbsp;每页&nbsp;".$this->pagesize."&nbsp;".$utits."&nbsp;第&nbsp;".$this->nowpage."&nbsp;页/共&nbsp;".$pagecount."&nbsp;页";
         $str.="&nbsp;&nbsp;&nbsp;&nbsp;";
         if($this->nowpage!=1)
             $str.="<a href=".$_SERVER['PHP_SELF']."?page=1&page_type=".$anothersearchstr."&parameter2=".$anothersearchstrs." class=".$class.">首页</a>";
         else
             $str.="<font color='#555555'>首页</font>";
         $str.="&nbsp;";
         if($this->nowpage!=1)
             $str.="<a href=".$_SERVER['PHP_SELF']."?page=".($this->nowpage-1)."&page_type=".$anothersearchstr."&parameter2=".$anothersearchstrs." class=".$class.">上一页</a>";
         else
             $str.="<font color='#555555'>上一页</font>";
         $str.="&nbsp;";
         if($this->nowpage!=$pagecount)
             $str.="<a href=".$_SERVER['PHP_SELF']."?page=".($this->nowpage+1)."&page_type=".$anothersearchstr."&parameter2=".$anothersearchstrs." class=".$class.">下一页</a>";
         else
             $str.="<font color='#555555'>下一页</font>";
         $str.="&nbsp;";
         if($this->nowpage!=$pagecount)
             $str.="<a href=".$_SERVER['PHP_SELF']."?page=".$pagecount."&page_type=".$anothersearchstr."&parameter2=".$anothersearchstrs." class=".$class.">尾页</a>";
         else
             $str.="<font color='#555555'>尾页</font>";
         if(count($this->array)==0 || $this->array==false)
             return "无数据！";
         else
             return $str;
     }
 }
 //系统常用方法
 class UseFun{

     function UnHtml($text){
        $content=(nl2br(htmlspecialchars($text)));
        $content=str_replace("[strong]","<strong>",$content);
        $content=str_replace("[/strong]","</strong>",$content);
        $content=str_replace("[em]","<em>",$content);
        $content=str_replace("[/em]","</em>",$content);
        $content=str_replace("[u]","<u>",$content);
        $content=str_replace("[/u]","</u>",$content);

        $content=str_replace("[font color=#FF0000]","<font color=#FF0000>",$content);
        $content=str_replace("[font color=#00FF00]","<font color=#00FF00>",$content);
        $content=str_replace("[font color=#0000FF]","<font color=#0000FF>",$content);

        $content=str_replace("[font face=楷体_GB2312]","<font face=楷体_GB2312>",$content);
        $content=str_replace("[font face=宋体]","<font face=新宋体>",$content);
        $content=str_replace("[font face=隶书]","<font face=隶书>",$content);
        $content=str_replace("[/font]","</font>",$content);
        //$content=str_replace(chr(32)," ",$content);
        $content=str_replace("[font size=1]","<font size=1>",$content);
        $content=str_replace("[font size=2]","<font size=2>",$content);
        $content=str_replace("[font size=3]","<font size=3>",$content);
        $content=str_replace("[font size=4]","<font size=4>",$content);
        $content=str_replace("[font size=5]","<font size=5>",$content);
        $content=str_replace("[font size=6]","<font size=6>",$content);

        $content=str_replace("[FIELDSET][LEGEND]","<FIELDSET><LEGEND>",$content);
        $content=str_replace("[/LEGEND]","</LEGEND>",$content);
        $content=str_replace("[/FIELDSET]","</FIELDSET>",$content);
        return $content;
     }

 }

 ?>