title: The character encoding of the HTML document was not declared
body: <p>When I click on my form's submit button the following error message appears:</p>
  <blockquote>
  <p>The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must to be declared in the document or in the transfer protocol.</p>
  </blockquote>
  <p>insert.html:</p>
  <pre><code>&lt;!DOCTYPE html PUBLIC&quot;-//W3C//DTD XHTML 1.0 Strict//EN&quot; &quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd&quot;&gt;
  &lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;
      &lt;head&gt;
      &lt;meta http-equiv=&quot;content-type&quot; content=&quot;text/html; charset=utf-8&quot; /&gt;
      &lt;title&gt;insert page&lt;/title&gt;&lt;/head&gt;
      &lt;body&gt;
      &lt;h1&gt; Insert Page &lt;/h1&gt;
          &lt;form action=&quot;insert.php&quot; method=&quot;post&quot;  enctype=&quot;application/x-www-form-urlencoded&quot; &gt;
           &lt;p&gt;Title:&lt;input type=&quot;text&quot; name=&quot;title&quot; size=&quot;40&quot; /&gt;&lt;/p&gt;
           &lt;p&gt;Price:&lt;input type= &quot;text&quot; name=&quot;price&quot; size=&quot;40&quot; /&gt;&lt;/p&gt;
           &lt;p&gt;&lt;input type=&quot;submit&quot; value=&quot;Insert&quot; /&gt;
           &lt;input type=&quot;reset&quot; value=&quot;Reset&quot; /&gt;&lt;/p&gt;
          &lt;/form&gt;    
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  <p>insert.php:</p>
  <pre><code>&lt;?php
      $title = $_POST[&quot;title&quot;];
      $price = $_POST[&quot;price&quot;];
  
      echo $title;
  ?&gt;
  </code></pre>
  <p>I don't know where is the problem in my code. Please help me.</p>