Login page login.html
<meta charset='UTF-8' /> back-stage management <form action="login.php" method='REQUEST'> user name <
input type='text' name='username' /><br /> password <input type='password' name='
password' /><br /> <input type='submit' name='submit' value=" Sign in " /> <a href="
register.html"> register </a> </form>

Login processing login.php
<meta charset='utf-8'> <?php @$username = $_REQUEST['username']; # user name @
$password = $_REQUEST['password']; # password $conn = mysqli_connect('localhost','root'
,'root','fuli'); $sql = "select * from admin where username='$username' and
password='$password'"; # Double quotation marks must be used , Analytic variable $result = mysqli_query($conn,$sql);
$result_array = mysqli_fetch_array($result); if($result_array['username']==
$username and $username!='' and $result_array['password']==$password and
$password!=''){ echo ' Login successful '; } else{ echo ' Login failed '; } ?>
Registration page register.html
<meta charset='UTF-8' /> back-stage management <form action="register.php" method='REQUEST'> user name
<input type='text' name='username' /><br /> password <input type='text' name='
password1' /><br /> Confirm password <input type='password' name='password2' /><br /> <input
type='submit' name='submit' value=" register " /> </form>

Registration processing register.php
<meta charset='utf-8'> <?php @$username = $_REQUEST['username']; # user name @
$password1 = $_REQUEST['password1']; # password @$password2 = $_REQUEST['password2'];
# password $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==''
|| $password2==''){ echo ' Please confirm the integrity of the information !'; } else{ if($password1 != $password2){
echo ' Inconsistent passwords !'; } else{ if($result_array){ echo ' User name already exists !'; } else{ $sql_insert =
"insert into admin value('$username','$password1')"; $result_insert =
mysqli_query($conn,$sql_insert); if($result_insert){ echo ' login was successful '; } else{ echo
' System busy , Please wait !'; } } } } ?>

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