PHP file getting deleted automatically
<p>I am trying to upload <a href="https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Filesystem/Filesystem.php" rel="nofollow">this file</a> to my server using cPanel and FTP and it gets deleted automatically.</p>

<p>I tried to creating a new empty file and pasting the contents of Filesystem.php and when I press the save button, the new files disappears.</p>

<p>I tested other PHP files and the behaviour is normal.</p>

<p>Any idea what might be the problem? This is the first time I am getting this type of problem.</p>