<form action="<?= $_SERVER['REQUEST_URI']; ?>" method="post">
<input type="text" name="object[name]" value="" />
<input type="text" name="object[surname]" value="" />
<input type="text" name="object[age]" value="" />
<input type="text" name="object[weight]" value="" />
<input type="checkbox" name="object[hobby][]" value="hockey" /> hockey

<input type="checkbox" name="object[hobby][]" value="football" /> football
<input type="submit" value="Save" />
</form>
.............
.............
$mongo = new \Mongo();
$mongo->test->webobjects->insert($_POST['object']);