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copied!<p>After researching and trying a lot of test & trials, I found some facts about the <code>header()</code> function and <code>readfile()</code> or similar ones.</p> <ol> <li><p>First of all you should know that <code>header()</code> has compatibility issues with different browsers. So don't try to look for a function that is flawless. The issue isn't the php function, it's the browsers that has different way of analyzing a download header so they all behave differently. And you may know already, the biggest troublemaker is IE</p></li> <li><p>If you want to fix the problem and make it work using <code>header()</code>, You'll have to add/force some header details (<code>Content-Type</code>,etc) , But this is not possible in your php code. No matter how many times you try, it just doesn't work that work. I don't have much info on this, But I just know even if you add the <code>Content-Type</code> headers before the actual <code>header()</code> it won't work. seems they are completely for different purposes.</p></li> <li><p>You can use add the necessary headers and use the <code>readfile()</code> function instead and it will work fine. But you should know that this function will load/read the file/url you're calling into the memory. This could be a big problem and will probably slow down your webserver, The worst situation is that it could crash as well. This can happen if you have too downloaders or many files.</p></li> </ol> <p>Unfortunately, as I mentioned before, you can't fix this in your php code. So what I did in order to fix this problem, was adding the headers in my webserver vhost.</p> <p>NginX:</p> <pre><code>location ~ ^/.*\.mp3$ { add_header Pragma "public"; add_header Expires "0"; add_header Cache-Control "must-revalidate, post-check=0, pre-check=0"; add_header Content-Disposition "attachment"; add_header Content-Type "application/force-download"; add_header Content-Type "application/octet-stream"; add_header Content-Type "application/download"; add_header Content-Transfer-Encoding "binary"; } </code></pre> <p>In my case, the files users had to download was in mp3 format. But you can change it or set a global directive so it can work with any format.</p>

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