如何为所有提交按钮设置特殊键

php (connect.php):- This is working fine when i open it by its own url <"http://sunilcpr.tech/pages/hotel/connect.php">

<?php
$link=mysqli_connect("shareddb-t.hosting.stackcp.net","hoteldetail-3133319f3d","sunil7117","hoteldetail-3133319f3d");
if(mysqli_connect_error()){
    die ("there is some problem");
}
?>

php (entry.php):- And this is working fine when i open it by its own url <"http://sunilcpr.tech/pages/hotel/entry.php">

<?php
include('connect.php');
if(array_key_exists("submit", $_POST)){
    print_r($_POST);
}
$query="SELECT * FROM entry";
if(mysqli_query($link,$query)){
    echo "Welcome to hotel";
}


?>

但是,当我想尝试从表单中发送数据时,我发现了一些提及利基的错误

用于发送数据的HTML文件,在我的文件中,我有两个提交按钮,然后我想为两个按钮都设置一个键,以便php可以理解这两个数据,现在,当我单击提交按钮时,我的页面就不会发送任何数据了。

And this is my page please see it for source code: <"http://sunilcpr.tech/pages/hotel/entry.html">