<form action='checks.php' method='post'>
Desayuno: <input type='checkbox' name='check1' value='desayuno'/><br />
Almuerzo: <input type='checkbox' name='check2' value='almuerzo'/><br />
Cafe: <input type='checkbox' name='check3' value='cafe'/><br />
<input type='submit' name='ok' value='enviar'/>
</form>
<?php
echo("<pre>");
echo("</pre>");
}
?>