¤ÓÊÑè§ if elseif

<?

 $a=30;

 if ( $a == 10 ){
      print "YES, this is 10";

 }elseif ( $a == 20 ) {
      print "YES, this is 20";

 }else{

  print "Oh.. NO!";
 }

?>

</body>
</html>