PHP access operation class

<?php    
--------------------------------------------------------------------    
//FileName:    
//Summary: Access database operation class
//Author:  forest    
//CreateTime: 2006-8-10         
//LastModifed:    
//copyright (c)2006     
///~chairy      
//[email]chaizuxue@[/email]    
//   Usage example:
//$databasepath="";    
//$dbusername="";    
//$dbpassword="";    
//include_once("");    
//$access=new Access($databasepath,$dbusername,$dbpassword);    

--------------------------------------------------------------------    
    class Access    
    {    
         var $databasepath,$constr,$dbusername,$dbpassword,$link;    
         function Access($databasepath,$dbusername,$dbpassword)    
         {    
               $this->databasepath=$databasepath;    
        $this->username=$dbusername;    
        $this->password=$dbpassword;    
        $this->connect();    
          }    

    function connect()    
    {    
        $this->constr="DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" . realpath($this->databasepath);     
        $this->link=odbc_connect($this->constr,$this->username,$this->password,SQL_CUR_USE_ODBC);    
        return $this->link;    
//if($this->link) echo “Congratulations, the database connection is successful!”;
//else echo "Database connection failed!";
    }    

    function query($sql)    
    {    
        return @odbc_exec($this->link,$sql);    
    }    

    function first_array($sql)    
    {    
        return odbc_fetch_array($this->query($sql));    
    }    

    function fetch_row($query)    
    {    
        return odbc_fetch_row($query);    
    }    

function total_num($sql)//get the total number of records
    {    
        return odbc_num_rows($this->query($sql));    
    }    

function close()//Close the database connection function
    {        
        odbc_close($this->link);    
    }    

function insert($table,$field)//Insert record function
    {    
        $temp=explode(',',$field);    
        $ins='';    
        for ($i=0;$i<count($temp);$i++)    
        {    
            $ins.="'".$_POST[$temp[$i]]."',";    
        }    
        $ins=substr($ins,0,-1);    
        $sql="INSERT INTO ".$table." (".$field.") VALUES (".$ins.")";    
        $this->query($sql);    
    }    

function getinfo($table,$field,$id,$colnum)//Get the detailed information of the record in the same item
    {    
        $sql="SELECT * FROM ".$table." WHERE ".$field."=".$id."";    
        $query=$this->query($sql);    
        if($this->fetch_row($query))    
        {    
            for ($i=1;$i<$colnum;$i++)    
            {    
          $info[$i]=odbc_result($query,$i);    
             }    
         }    
         return $info;    
    }    

function getlist($table,$field,$colnum,$condition,$sort="ORDER BY id DESC")//Get record list
    {    
         $sql="SELECT * FROM ".$table." ".$condition." ".$sort;    
         $query=$this->query($sql);    
         $i=0;    
         while ($this->fetch_row($query))     
         {    
        $recordlist[$i]=getinfo($table,$field,odbc_result($query,1),$colnum);    
        $i++;    
          }    
          return $recordlist;    
    }    

function getfieldlist($table,$field,$fieldnum,$condition="",$sort="")//Get record list
    {    
         $sql="SELECT ".$field." FROM ".$table." ".$condition." ".$sort;    
         $query=$this->query($sql);    
         $i=0;    
         while ($this->fetch_row($query))     
         {    
         for ($j=0;$j<$fieldnum;$j++)    
        {    
                   $info[$j]=odbc_result($query,$j+1);    
        }        
        $rdlist[$i]=$info;    
        $i++;    
         }    
         return $rdlist;    
    }    

function updateinfo($table,$field,$id,$set)//Update record
    {    
        $sql="UPDATE ".$table." SET ".$set." WHERE ".$field."=".$id;    
        $this->query($sql);    
    }    

function deleteinfo($table,$field,$id)//Delete record
    {    
         $sql="DELETE FROM ".$table." WHERE ".$field."=".$id;    
         $this->query($sql);    
    }    

function deletererectord($table,$condition)//Delete the record of the specified condition
    {    
         $sql="DELETE FROM ".$table." WHERE ".$condition;    
         $this->query($sql);    
    }    

function getcondrecord($table,$condition="")// The number of records obtained for the specified conditions
    {    
         $sql="SELECT COUNT(*) AS num FROM ".$table." ".$condition;    
         $query=$this->query($sql);    
         $this->fetch_row($query);    
         $num=odbc_result($query,1);    
         return $num;                
    }    
     }    
?>