mysql.php

<?
   /* ***************************************
  名称:  dirmanage.php
    作者:  psdshow
                 联系方式: [email protected]
    版本号:  1.0
  版权:
    编写日期: 2005年12月11日
    文件描述: 用于数据库的连接,查询
    修改日志:
  **************************************** */
class   Mysql {
            var   $linkid ;
            var   $db_host ;
            var   $db_user ;
            var   $db_pwd ;
            var   $db_name ;
            var   $querynum = 0 ;
            var   $selectid ;
            var   $result =   null ;
            var   $pconnect   =   true ;

// 构造函数,初始化类时需带入数据库参数
function   Mysql ( $db_host , $db_user , $db_pwd , $db_name , $pconnect   =   true ){
            $this -> db_host  = $db_host ;
            $this -> db_user  = $db_user ;
            $this -> db_pwd   = $db_pwd ;
            $this -> db_name  = $db_name ;

            if ( $this -> pconnect  ==   $pconnect ){
              $this -> linkid = @ mysql_pconnect ( $this -> db_host , $this -> db_user , $this -> db_pwd);
             }
              else {
              $this -> linkid = @ mysql_connect ( $this -> db_host , $this -> db_user , $this -> db_pwd);
             }

              if ( $this -> linkid){
                if ( $this -> db_name != "" ){
                  $dbselect = @ mysql_select_db ( $this -> db_name) or  $this -> mysql_err( " database not exists " );
                 }
               }
                else {
                $this -> Mysql_err( " cannot connect the database server,pls chk your password " );
               }
            // $this->query("SET NAMES 'utf8'");
           }

// 用于执行SQL语句
function  Query( $sql ){
                     $this -> result = @ mysql_query ( $sql , $this -> linkid) or  $this -> mysql_err( " SQL语句 " . $sql . " 错误 " );
                     $this -> querynum ++ ;
                     return   $this -> result;
                    }

function  fetch_array( $sql ) {
   return   mysql_fetch_array ( $sql , MYSQL_ASSOC);
 }

// 用于统计记录的数目
function   Number ( $sql ){
                      $this -> result = $this -> query( $sql );
                      $number = mysql_num_rows ( $this -> result);
                      $this -> Free();
                      return   $number ;
                     }

// 取得一条记录
function  GetRow( $sql ){
                      $this -> query( $sql );
                      $row = mysql_fetch_array ( $this -> result , MYSQL_ASSOC);
                      $this -> Free();
                      return   $row ;
                     }
// 取得全部记录
function  GetRows( $sql ){
                       $this -> result = $this -> query( $sql );
                       while ( $row = mysql_fetch_array ( $this -> result , MYSQL_ASSOC))
                           {
                            $allrows [] = $row ;
                           }
                       $this -> Free();
                       return   $allrows ;
                      }

// 取得当前插入ID
function  InsertID() {
                 $id   =   mysql_insert_id ();
                 return   $id ;
                     }
// 关闭数据库
function  Close(){
                @ mysql_close ( $this -> linkid);
                }
// 打印错误信息
function  Mysql_err( $msg ){
                         echo   $msg ;
                         exit ;
                        }
// 释放
function  Free(){
               @ mysql_free_result ( $this -> result);
                $this -> result = null ;
               }

 }
?>