title: $_Post Doesnt Work [Undefined index]
body: <p>Giris.php (login screen)</p>
  
  <pre><code>  &lt;html&gt;
            &lt;form method="post" action="verify.php"&gt;
            &lt;p&gt;Birinci Isletim Sistemi:&lt;/p&gt; &lt;input type="text" name="txt_biris"&gt;&lt;br&gt;&lt;br&gt;
            &lt;p&gt;Ikinci Isletim Sistemi:&lt;/p&gt; &lt;input type="text" name="txt_ikis"&gt;&lt;br&gt;
              &lt;input type="submit" value="Karşılaştır!"&gt;
            &lt;/form&gt;
                  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Verify.php</p>
  
  <pre><code>    &lt;?php
  $ad = $_POST["txt_biris"];
  echo"Ad...: $ad";
  $sifre = $_POST["txt_ikis"];
  echo "Sifre...: $sifre";
  </code></pre>
  
  <p>It returns..</p>
  
  <p><a href="https://i.stack.imgur.com/VxoLg.png" rel="nofollow noreferrer">Error</a></p>
  
  <p><a href="https://i.stack.imgur.com/WgBDT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WgBDT.png" alt="enter image description here"></a></p>
  
  <p>I tried many ways, controlled variables etc. But i didnt fix it. I'm using PHP 7 on Apache 2.4.17.</p>