I am trying to build a website people can fill/upload necessary information in a form. Based on these information, the server does some computation, generates an output file and return the file. Everything goes well except the last step of returning. Following is a simplified version of my site that you can test directly. In this example, it should return a file containing the file name uploaded by the user while stay on the same page. However, it actually returns the html code of the page and the file name. What should I do to get only the output file not the html code? Thanks a lot!
I tried with flask, and everything went well. Now, for some reason I would like to translate everything to php. I am really new to website building and lack a lot of background knowledge.
<!DOCTYPE html>
<html>
<body>
<form action="" method="POST" autocomplete="on"
enctype="multipart/form-data">
<div> Upload your file: <input type="file" name="file"/> </div>
<input style="margin-left: 0.5em;" type="submit" id="click"
value="Click Me!" name='submit_btn'/>
</form>
<?php
if(isset($_POST['submit_btn']))
{
$fp = fopen("./output.txt", "w");
fwrite($fp, $_FILES['file']['name']."
");
fclose($fp);
header("Content-Type:text/plain");
header("Content-Type: application/download");
header('Content-Disposition: attachment;
filename="output.txt"');
readfile("output.txt");
}
?>
</html>
