SqlHelper.class.php+分页类方法

<?php 
    class SqlHelper{
        private  $conn;
        private static  $host="localhost";
        private static  $user="root";
        private static  $password="";
        private static  $db="emp";
        //构造函数 完成初始化的任务
        public function  __construct(){
           $this->conn= new mysqli(self::$host,self::$user,self::$password,self::$db);
            if ($this->conn->connect_error){
                die("连接失败".$this->conn->connect_error);
                
            }
            $this->conn->query("set names utf8");
            
        }
        
         
           
        //执行dql查询语句
        public function execut_dql($sql){
            $res=$this->conn->query($sql) or 
            die('sql语句错误'.$this->conn->error);
            
            //关闭连接
            $this->conn->close();
           
            return $res;
            //释放资源
            $res->free();
            
        }
        //执行dml语句
        public function execut_dml($sql){
            
          //操作$sql
        $res=$this->conn->query($sql) or die("sql语句错误".$this->conn->error);
            
            
            if (!$res){
                return 0; //操作失败
            }else{
                if($this->conn->affected_rows>0){
                    return 1; //操作成功
                }else {
                    return 2; //没有受影响的行数
                }
            
               
                
            }
            //关闭连接
            $this->conn->close();
            //释放资源
            $res->free();
           
        }
        public function execut_dql2($id){
            $res=$this->conn->query($id) or die("sql语句错误".$this->conn->error);;
            //查询的结果放进数组中
            $emps=array();
            
            while($row=$res->fetch_assoc()){
                $emps[]=$row;
                 
            }
            
            //关闭资源
            $res->free();
            //关闭连接
            $this->conn->close();
            return $emps;
        }
        //执行分页的的sql语句，并赋值给fenyepage类
        public  function  execut_dql_fenye($sql1,$sql2,$fenyePage){
            //执行要查询的语句 $res1返回一个结果集
            $res1=$this->conn->query($sql1) or die("sql语句错误".$this->conn->error);
            //用数组接收取出的值
            $arr= array();
            //取出结果集每一行，转移到数组中
             while ($row=$res1->fetch_assoc()){
                 $arr[]=$row;
             }
              //释放资源
              $res1->free();
              
             $fenyePage->arr=$arr;
             
             $res2=$this->conn->query($sql2) or die("sql语句错误".$this->conn->error);
             
             $count=$res2->fetch_assoc();
             $rowCount=$count['c'];
             
             $fenyePage->rowCount=$rowCount;
             $fenyePage->pageCount=ceil($rowCount/$fenyePage->pageSize);
             //释放资源
             $res2->free();
             //关闭连接
             $this->conn->close();
             //如果点击当前页大于1使用当前页-1，小于使用1
             $prev= $fenyePage->pageNow>1 ? $fenyePage->pageNow-1:1;
             //如果点击当前页小于总页，当前页加一，否则取总页
             $next= $fenyePage->pageNow<$fenyePage->pageCount ? $fenyePage->pageNow+1:$fenyePage->pageCount;
            
             $pageMix=$fenyePage->pageNow-$fenyePage->pageSpa<1 ? 1:$fenyePage->pageNow-$fenyePage->pageSpa;
             $pageMax=$fenyePage->pageNow+$fenyePage->pageSpa-1<10 ? 10:$fenyePage->pageNow+$fenyePage->pageSpa-1;
             $pageMaxd= $pageMax>$fenyePage->pageCount?$fenyePage->pageCount:$pageMax;
             //首页
             $fenyePage->naviga="<a href='$fenyePage->url?pageNow=1'>首页</a>&nbsp;&nbsp;";
             //快速翻页，如果点击的页面小于10，隐藏
             if($fenyePage->pageNow>10){
                 $fenyePage->naviga.="<a href='$fenyePage->url?pageNow=".($pageMix-5)."'><<</a>&nbsp;&nbsp;";
             }
             if($fenyePage->pageNow!=1){
             
              //页面不等于1显示页面，否则不显示上一页
             
                 $fenyePage->naviga.= "<a href='$fenyePage->url?pageNow=$prev'>上一页</a>&nbsp;&nbsp;";
             }
            
             
             for($pageMix;$pageMix<=$pageMaxd;$pageMix++){
                  
              $fenyePage->naviga.="<a href='$fenyePage->url?pageNow=$pageMix'>$pageMix</a>&nbsp;&nbsp;";
                  
             }
             if($fenyePage->pageNow < $fenyePage->pageCount){
             $fenyePage->naviga.="<a href='$fenyePage->url?pageNow=$next'>下一页</a>&nbsp;&nbsp;";
             }
             if($fenyePage->pageNow+5<$fenyePage->pageCount){
             $fenyePage->naviga.="<a href='$fenyePage->url?pageNow=".($pageMaxd+$fenyePage->pageSpa+1)."'>>></a>&nbsp;&nbsp;";
             }
             $fenyePage->naviga.="<a href='$fenyePage->url?pageNow=$fenyePage->pageCount'>末页</a>&nbsp;&nbsp;";
             $fenyePage->naviga.="当前第{$fenyePage->pageNow}页/总共{$fenyePage->pageCount}页<br/><br/>";
        }


    }
?>