SqlHelper.class.php+分页类方法

Posted 2020-09-05 kevin

  1 <?php 
  2     class SqlHelper{
  3         private  $conn;
  4         private static  $host="localhost";
  5         private static  $user="root";
  6         private static  $password="";
  7         private static  $db="emp";
  8         //构造函数 完成初始化的任务
  9         public function  __construct(){
 10            $this->conn= new mysqli(self::$host,self::$user,self::$password,self::$db);
 11             if ($this->conn->connect_error){
 12                 die("连接失败".$this->conn->connect_error);
 13                 
 14             }
 15             $this->conn->query("set names utf8");
 16             
 17         }
 18         
 19          
 20            
 21         //执行dql查询语句
 22         public function execut_dql($sql){
 23             $res=$this->conn->query($sql) or 
 24             die(‘sql语句错误‘.$this->conn->error);
 25             
 26             //关闭连接
 27             $this->conn->close();
 28            
 29             return $res;
 30             //释放资源
 31             $res->free();
 32             
 33         }
 34         //执行dml语句
 35         public function execut_dml($sql){
 36             
 37           //操作$sql
 38         $res=$this->conn->query($sql) or die("sql语句错误".$this->conn->error);
 39             
 40             
 41             if (!$res){
 42                 return 0; //操作失败
 43             }else{
 44                 if($this->conn->affected_rows>0){
 45                     return 1; //操作成功
 46                 }else {
 47                     return 2; //没有受影响的行数
 48                 }
 49             
 50                
 51                 
 52             }
 53             //关闭连接
 54             $this->conn->close();
 55             //释放资源
 56             $res->free();
 57            
 58         }
 59         public function execut_dql2($id){
 60             $res=$this->conn->query($id) or die("sql语句错误".$this->conn->error);;
 61             //查询的结果放进数组中
 62             $emps=array();
 63             
 64             while($row=$res->fetch_assoc()){
 65                 $emps[]=$row;
 66                  
 67             }
 68             
 69             //关闭资源
 70             $res->free();
 71             //关闭连接
 72             $this->conn->close();
 73             return $emps;
 74         }
 75         //执行分页的的sql语句，并赋值给fenyepage类
 76         public  function  execut_dql_fenye($sql1,$sql2,$fenyePage){
 77             //执行要查询的语句 $res1返回一个结果集
 78             $res1=$this->conn->query($sql1) or die("sql语句错误".$this->conn->error);
 79             //用数组接收取出的值
 80             $arr= array();
 81             //取出结果集每一行，转移到数组中
 82              while ($row=$res1->fetch_assoc()){
 83                  $arr[]=$row;
 84              }
 85               //释放资源
 86               $res1->free();
 87               
 88              $fenyePage->arr=$arr;
 89              
 90              $res2=$this->conn->query($sql2) or die("sql语句错误".$this->conn->error);
 91              
 92              $count=$res2->fetch_assoc();
 93              $rowCount=$count[‘c‘];
 94              
 95              $fenyePage->rowCount=$rowCount;
 96              $fenyePage->pageCount=ceil($rowCount/$fenyePage->pageSize);
 97              //释放资源
 98              $res2->free();
 99              //关闭连接
100              $this->conn->close();
101              //如果点击当前页大于1使用当前页-1，小于使用1
102              $prev= $fenyePage->pageNow>1 ? $fenyePage->pageNow-1:1;
103              //如果点击当前页小于总页，当前页加一，否则取总页
104              $next= $fenyePage->pageNow<$fenyePage->pageCount ? $fenyePage->pageNow+1:$fenyePage->pageCount;
105             
106              $pageMix=$fenyePage->pageNow-$fenyePage->pageSpa<1 ? 1:$fenyePage->pageNow-$fenyePage->pageSpa;
107              $pageMax=$fenyePage->pageNow+$fenyePage->pageSpa-1<10 ? 10:$fenyePage->pageNow+$fenyePage->pageSpa-1;
108              $pageMaxd= $pageMax>$fenyePage->pageCount?$fenyePage->pageCount:$pageMax;
109              //首页
110              $fenyePage->naviga="<a href=‘$fenyePage->url?pageNow=1‘>首页</a>&nbsp;&nbsp;";
111              //快速翻页，如果点击的页面小于10，隐藏
112              if($fenyePage->pageNow>10){
113                  $fenyePage->naviga.="<a href=‘$fenyePage->url?pageNow=".($pageMix-5)."‘><<</a>&nbsp;&nbsp;";
114              }
115              if($fenyePage->pageNow!=1){
116              
117               //页面不等于1显示页面，否则不显示上一页
118              
119                  $fenyePage->naviga.= "<a href=‘$fenyePage->url?pageNow=$prev‘>上一页</a>&nbsp;&nbsp;";
120              }
121             
122              
123              for($pageMix;$pageMix<=$pageMaxd;$pageMix++){
124                   
125               $fenyePage->naviga.="<a href=‘$fenyePage->url?pageNow=$pageMix‘>$pageMix</a>&nbsp;&nbsp;";
126                   
127              }
128              if($fenyePage->pageNow < $fenyePage->pageCount){
129              $fenyePage->naviga.="<a href=‘$fenyePage->url?pageNow=$next‘>下一页</a>&nbsp;&nbsp;";
130              }
131              if($fenyePage->pageNow+5<$fenyePage->pageCount){
132              $fenyePage->naviga.="<a href=‘$fenyePage->url?pageNow=".($pageMaxd+$fenyePage->pageSpa+1)."‘>>></a>&nbsp;&nbsp;";
133              }
134              $fenyePage->naviga.="<a href=‘$fenyePage->url?pageNow=$fenyePage->pageCount‘>末页</a>&nbsp;&nbsp;";
135              $fenyePage->naviga.="当前第{$fenyePage->pageNow}页/总共{$fenyePage->pageCount}页<br/><br/>";
136         }
137 
138 
139     }
140 ?>