<form method="POST" action="felan.php">
<input type="radio" value="yes" checked name="R1">
<span lang="fa">آري</span>
<p>
<input type="radio" name="R1" value="no">
<span lang="fa"> خير</span>
</p>
<p><input type="submit" value="Submit" name="B1"></p>
</form>
<?php
$R1=$_REQUEST[R1];
?>