在POST请求期间找不到php文件

我正在用Framework7和Phonegap构建一个简单的移动应用程序，它将表单数据提交到数据库。我已根据向POST测试服务器发送的命令创建了一个表单POST，如下所示：

<form action="https://ptsv2.com/t/c1i9p-1580217375/post" method="POST" class="form-ajax-submit">

<?php
$servername = "localhost";
$database = "test";
$username = "root";
$password = "";

//Create connection
$conn = mysqli_connect($servername, $username, $password, $database);

//Insert generic variables into table for testing 
$sql = "INSERT INTO meeting (first_name, surname, email) 
        VALUES ('John', 'Doe', 'johndoe@gmail.com')";

mysqli_close($conn);

---

如果我点击上面的链接，有问题的php文件将下载到我的电脑上，那么我不认为这实际上是一个无法找到文件的问题，而是php或数据库出了问题？这是我第一次做POST请求，所以请原谅任何愚蠢的错误。

您需要安装PHP服务器，例如Apache

<?php
$servername = "localhost";
$database = "test";
$username = "root";
$password = "";

//Create connection
$conn = mysqli_connect($servername, $username, $password, $database);

//Insert generic variables into table for testing 
$sql = "INSERT INTO meeting (first_name, surname, email) 
        VALUES ('John', 'Doe', 'johndoe@gmail.com')";

mysqli_close($conn);

POST http://myIP:55/php/form-data.php 404 (Not Found)