Why readfile() is acting strange in reading a php file but working fine on text file

Question

Code in index.php

code in hello.php

Answer 1

This is happening because readfile echos to the screen for you. echo readfile() is unnecessary. After echoing, readfile returns the number of bytes that it read, so that's where the 47 is coming from.

You can just do:

readfile('hello.php');

or you can use

echo file_get_contents('hello.php');

if you choose.

Also, I suggest you check the source of your page in your browser (consult your browser's docs). Chances are, you'll see the PHP file clearly there. Your browser is probably trying to render the response as an HTML file. It's trying to parse as an HTML tag. That's why it's not displayed.

To get around this, you can try to add

header('Content-type: text/plain');

before you echo your hello.php file to the screen. This should tell the browser that it's receiving just a text file and not to try to parse it as HTML.