PHP不接受POST中的重音

I'm trying to submit letters with accents, â, ê, î, ô, û, through a form and I'm not getting them in POST, I have no issues with displaying letters with accents on my site.

I have the following in my header file;

header('Content-Type:text/html; charset=ISO-8859-1');
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" />

The default_charset on the server is also set to ISO-8859-1

I tried setting my form charset but still no luck

<form method="post" accept-charset="ISO-8859-1">

Example of code that is being used

echo 'â, ê, î, ô, û';
if(isset($_POST['commentSubmit'])) {
  print_r($_POST);
}
echo '<form method="post" accept-charset="ISO-8859-1">
  <input type="hidden" name="submitType" value="tech" />
  <input type="hidden" name="mailType" value="feedback" />
  <input type="hidden" name="mailTypeSub" value="response" />
  <input type="hidden" name="mailLanguage" value="FR" />
  <input type="hidden" name="tName" value="Josh" />
  <input type="hidden" name="tEmail" value="" />
  <input type="hidden" name="feedback" value="" />
  <table border="0" width="50%" class="datatable" cellpadding="3" cellspacing="1">
    <tr>
      <th>Email Technican</th>
    </tr>
    <tr>
      <td><textarea name="comment" cols="67" rows="10"></textarea></td>
    </tr>
    <tr>
      <th><input type="submit" name="commentSubmit" value="Email Technican" onclick="return confirm(\'Are you sure you want to email this technician?\')"/></th>
    </tr>
  </table>
</form>';

Output of _POST

Why don't you try the hexadecimal equivalents?

â

&#226;

ê

&#234;

î

&#238;

ô

&#244;

û

&#251;

Edit: Here's a list: http://www.codetable.net/unicodecharacters