9、如何删除数据库中的一条记录 |
<!--?php |
$sql = "delete from liuyan where ly_id=$_GET[id]" ; |
mysql_query( $sql , $connec ); |
echo ( "<script type='text/javascript'--> alert('删除成功!');location.href='../index.php';" ); |
?> |
10、如何进行会员登录验证 |
<!--?php |
session_start(); |
$username = $_POST [ "username" ]; |
$password = $_POST [ "password" ]; |
$sql = "select * from admin where username='" . $username . "' && password='" . $password . "'" ; |
$result =mysql_query( $sql , $connec ); |
if ( $row =mysql_fetch_array( $result )){ |
session_register( "admin" ); |
$admin = $username ; |
echo ( "<script type='text/javascript'-->alert('登录成功!');location.href='admin.php';" );} |
else |
{ |
echo ( "<script type=" text/javascript"> // <![CDATA[ |
alert( '你输入的用户名或密码错误,请重新输入!' );location.href= 'login.php' ; |
// ]]></script>"); |
} |
mysql_close(); |
?> |
11、如何对SESSION进行检验(后台检查页面的制作) |
<!--?php session_start(); if (!isset( $_SESSION [ "admin" ])){ header( "location:login.php" ); exit ; } ?-->12、验证用户名及密码是否填写(javascript)<script type= "text/javascript" language= "javascript" > // <![CDATA[ |
function confirmlogin() |
{ |
if (document.frmmain.username.value.length<4 || document.frmmain.username.value== "" ) |
{ |
document.frmmain.username.focus(); |
document.frmmain.username.select; |
window.alert( "请输入你的用户名!" ); |
return false; |
} |
if (document.frmmain.password.value.length<4) { document.frmmain.password.focus(); document.frmmain.password.select; window.alert( "请输入你的密码!" ); return false; } return true; } |
// ]]></script> |