Ti suggerisco di ricominciare dalle basi dell'HTML:
Codice PHP:
<form method="post">
<input type="radio" name="item" value="1" checked="checked" />
<input type="radio" name="item" value="2" />
<input type="radio" name="item" value="3" />
<input type="checkbox" name="array[]" value="1" checked="checked" />
<input type="checkbox" name="array[]" value="2" checked="checked" />
<input type="checkbox" name="array[]" value="3" checked="checked" />
<input type="submit" />
</form>
<pre>
<?php
var_dump(@$_POST['item']);
print("\r\n");
var_dump(@$_POST['array']);
?>
</pre>