读写数据库的有关问题

读写数据库的问题

PHP code

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<?
require_once("session.php");
$web_root_part = "../";
require_once($web_root_part."lib/db.php");
require_once($web_root_part."lib/function.php");
header('Content-type:text/html;charset=utf-8');   

$AdminID = trim($_POST['AdminID']);
$PassWord = trim($_POST['PassWord']);
$Addtime = date("Y-m-d H:i:s");

$querySel = "select * from Admin where AdminID='".$AdminID."'";
if( !($result = $db->sql_query($querySel)) )
{
    message_die(DB_MESSAGE, 'Could not query Admin');
        
}else{
    
    $row = $db->sql_fetchrow($result);    
    //$db->sql_freeresult($result);
        
    if (empty($row['ID'])){
        
        $sql="insert into Admin (AdminID,PassWord,Editer,Addtime) values('".$AdminID."','".md5($PassWord)."','".$_SESSION['AdminID']."','".$Addtime."')";
        if( !($result = $db->sql_query($sql)) )
        {
            //echo $sql;
            message_die(DB_MESSAGE, 'Could not query Admin');
                
        }else{
                    
          echo "<script>location.replace('admin.php');</script>";    
        }    
        
    }else{
        
        echo "<Script Language='Javascript'>";
        echo "alert('提示：管理员ID已存在,请重新输入！');";
        echo "history.go(-1);";
        echo "</Script>"; 
    }
}        
?>

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