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登录页面login.html
<meta charset='UTF-8' /> 后台管理 <form action="login.php" method='REQUEST'> 用户名 <
input type='text' name='username' /><br /> 密码 <input type='password' name='
password' /><br /> <input type='submit' name='submit' value="登录" /> <a href="
register.html">注册</a> </form>
登录处理login.php
<meta charset='utf-8'> <?php @$username = $_REQUEST['username']; #用户名 @
$password = $_REQUEST['password']; #密码 $conn = mysqli_connect('localhost','root'
,'root','fuli'); $sql = "select * from admin where username='$username' and
password='$password'"; #必须使用双引号，解析变量 $result = mysqli_query($conn,$sql);
$result_array = mysqli_fetch_array($result); if($result_array['username']==
$username and $username!='' and $result_array['password']==$password and
$password!=''){ echo '登录成功'; } else{ echo '登录失败'; } ?>
注册页面register.html
<meta charset='UTF-8' /> 后台管理 <form action="register.php" method='REQUEST'> 用户名
<input type='text' name='username' /><br /> 密码 <input type='text' name='
password1' /><br /> 确认密码 <input type='password' name='password2' /><br /> <input
type='submit' name='submit' value="注册" /> </form>
注册处理register.php
<meta charset='utf-8'> <?php @$username = $_REQUEST['username']; #用户名 @
$password1 = $_REQUEST['password1']; #密码 @$password2 = $_REQUEST['password2'];
#密码 $conn = mysqli_connect('localhost','root','root','fuli'); $sql = "select *
from admin where username='$username'"; $result = mysqli_query($conn,$sql);
$result_array = mysqli_fetch_array($result); if($username=='' || $password1==''
|| $password2==''){ echo '请确认信息的完整性！'; } else{ if($password1 != $password2){
echo '密码不一致！'; } else{ if($result_array){ echo '用户名已存在！'; } else{ $sql_insert =
"insert into admin value('$username','$password1')"; $result_insert =
mysqli_query($conn,$sql_insert); if($result_insert){ echo '注册成功'; } else{ echo
'系统繁忙，请稍后！'; } } } } ?>