PHP Post_method hacking
<p>I ran into the snippet online
<a href="https://www.quora.com/Why-is-PHP-hated-by-so-many-developers" rel="nofollow noreferrer">https://www.quora.com/Why-is-PHP-hated-by-so-many-developers</a>
when I was doing some research about PHP, and I simply have no idea how the codes work.    </p>

<p>Can anyone kindly explain what happens in the snippet and how one can log in without knowing the password?? or just give me some relevant articles to read. Thanks in advance.</p>

<p><a href="https://i.stack.imgur.com/DwVFr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DwVFr.png" alt="enter image description here"></a></p>