title: display value on checkbox after submit
body: <p>i have a php file like this</p>
  
  <pre><code>    &lt;form action='#' method='POST'&gt;
      &lt;p&gt;
          &lt;input type='checkbox' name='interest[]' value="music"&gt;music
          &lt;input type='checkbox' name='interest[]' value="reading book"&gt;reading book
          &lt;input type='checkbox' name='interest[]' value="coding"&gt;coding
  
      &lt;/p&gt;
  &lt;input type='submit' name='send'&gt;&lt;br/&gt;
      &lt;/form&gt;
  </code></pre>
  
  <p>i tried to foreach loop to output the selected values. However it always output "Array";</p>
  
  <pre><code>&lt;?php
  foreach($_POST as $keys =&gt;$values)
  {
      echo $values."&lt;br/&gt;";
  }
  ?&gt;
  </code></pre>