td>sha256</td>
<td>32</td>
<td>64</td>
</tr>
<tr class="row-odd"><td>sha224</td>
<td>28</td>
<td>56</td>
</tr>
</tbody>
</table>
<p>The reason for not including other popular algorithms, such as
MD5 or SHA1 is that they are no longer considered secure enough
and as such, we don’t want to encourage their usage.
If you absolutely need to use them, it is easy to do so via PHP’s
native <a class="reference external" href="http://php.net/manual/en/function.hash-hmac.php">hash_hmac()</a> function.</p>
<p>Stron