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The client is a simple form, the file name is send.php

<form action="http://vps_ip/phplearn/do.php" method="post">
用戶(hù)名：  <input type="text" name="userName" size="12"/>
密碼：    <input type="text" name="PS" size="12"/>
<input type="submit" value="登錄">
</form>

Server-side program, file name do.php

<?php
$userName = $_POST["userName"];
$PS = $_POST["PS"];
echo "the name is:  ".$userName;
echo "<br>key word is:  ".$PS;
?>

Now open two web pages respectively
Client

Service-Terminal

After clicking on the client's login, the client's page will change to

Now, I want to do this: after the client clicks to log in, the client's web page remains unchanged, but the server's web page changes. Can this be done?