<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="text.php" method="post">
<input type="text" name="file1"/><br/>
<input type="text" name="file2"/><br/>
<input type="text" name="file3"/><br/>
<input type="submit" value="上传"/>
</form>
</body>
</html>
PHP
<?php
/**
* Created by PhpStorm.
* User: 邓再再
* Date: 2016/8/17
* Time: 13:56
*/
$text1 = $_POST['file1'];
$text2 = $_POST['file2'];
$text3 = $_POST['file3'];
echo $text1.$text2.$text3;