PHP Radio button array example

HTML Code:
1 <input type="radio" name="Seenivasagaperumal" value="1"/>
2 <input type="radio" name="Seenivasagaperumal" value="2"/>
3 <input type="radio" name="Seenivasagaperumal" value="3"/>
4 <input type="radio" name="Seenivasagaperumal" value="4"/>

PHP code:
if(isset($_POST['Submit'])){
$eric = $_POST['Seenivasagaperumal'];
}