Wrong md5sums when downloading from web host

[foxclone]

When I run the following code on my local apache server, the md5sums of the downloaded files are correct. When I run the code on my web host, I get different md5sums. I've scrubbed the code to eliminate blank spaces before the readfile statement. I'm not getting any errors with error_reporting(E_ALL), display_errors=On, and output_buffering = off in my local php.ini as well as on my web host.

Here's the code I'm currently using:

<?php
function mydloader($l_filename=NULL){    
    if( isset( $l_filename ) ) {
        $filename = preg_replace("/\s+/u", " ", $l_filename);//Eliminate any hidden characters
        $ext = pathinfo($filename, PATHINFO_EXTENSION);{
        if  ($ext = '.deb')
            header('Content-Type: application/x-debian-package');
        elseif ($ext = '.iso')
            header('Content-Type: application/x-cd-image');
        elseif ($ext = '.gz')
            header('Content-Type: application/zip');
        else
            header('Content-Type: octet-stream');}
            header("Content-Disposition: attachment; filename={$filename}");
            header('Pragma: no-cache');
            header('Expires: 0');        
            readfile($filename);
      }
        
    else {
        echo "isset failed";
        }  
}      
mydloader($_GET["f"]);

I've removed all other code from this script in order to eliminate any other issues.  Does anyone have an idea what's going on?

Thanks in advance.
    

[ginerjm]

Your if statements are wrong

And why are you using this version of the same code that we cleaned up for you earlier?

[foxclone]

@ginerjm - As I said, that code is working correctly now and does the downloads. The problem now is that the md5sums on the downloaded files is incorrect coming from the server. I removed all the sql code to ensure that it wasn't causing the problem. 

What's wrong with the if statements? The structure is right from https://www.php.net .

[ginerjm]

Well if it is EXACTLY as copied then I don't know what it is doing.  If you are trying to ask "is $ext equal to .deb" then you are not doing that.   Try 2 equal signs...

As for your concern about the md5sums - since there is no code present showing us what is or is not happening, we can't help you.

[foxclone]

@ginerjm - The problem was with = instead of ==. Thanks a lot!

[ginerjm]

HTH