Codice PHP:
<form method="post">
<input type="checkbox" name="element[eta]" value="1" />Eta'
<input type="checkbox" name="element[nome]" value="1" />Nome
<input type="checkbox" name="element[cognome]" value="1" />Cognome
<input type="submit" />
</form>
<pre>
<?php
print_r($_POST);
?>
</pre>