如代码：
//修改admin为你的登录参数。登录地址为 http：//xx.com/admin/cms_login.php?admin
*/
if(isset($_POST['submit'])){
if ($_SESSION['verifycode'] != $_POST['verifycode']) {
alert_href('验证码错误','cms_login.php');
}
null_back($_POST['a_name'],'请输入用户名');
null_back($_POST['a_password'],'请输入密码');
null_back($_POST['verifycode'],'请输入验证码');
$a_name = $_POST['a_name'];
$a_password = $_POST['a_password'];
$sql = 'select * from mkcms_manager where m_name = "'.$a_name.'" and m_password = "'.md5($a_password).'"';
$result = mysqli_query($conn,$sql);
if(!! $row = mysqli_fetch_array($result)){
setcookie('admin_name',$row['m_name']);
setcookie('admin_password',$row['m_password']);
header('location:cms_welcome.php');
}else{
alert_href('用户名或密码错误','cms_login.php');
}
直接去数据库替换，经常改密码
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