Así?
Código (html4strict) [Seleccionar]
<form action='index.php' method='post'>
<input type="text" name="txtWord" />
<input type="submit" name="btnSearch" value="Search..." /><br>
<label>
<input type="radio" value="Movie" id="rType" name="rType" checked="checked" />Movie
</label>
<label>
<input type="radio" value="Magazines" id="rType" name="rType" />Magazines
</label>
</form>
Código (php) [Seleccionar]
<?php
$stxtWord = $_POST['txtWord'];
$srType = $_POST['rType'];
if($srType == 'Movie'){
echo 'The name movie is: '.$stxtWord;
}else{
echo 'The name magazine is: '.$stxtWord;
}
?>