<?php

echo strrev(substr(pi(), 4, 8));
echo '<br>';
/*
define("MYNAME", "Linwebs");

echo MYNAME;
echo '<br>';*/

$a = 50;
$b = 80;

echo 'a = ' . $a;
echo '</br>';
echo 'b = ' . $b;
echo '</br>';

switch ($a <=> $b) {
	case -1:
		echo 'a小於b';
		break;
	case 0:
		echo 'a等於b';
		break;
	case 1:
		echo 'a大於b';
		break;
	default:
		echo '錯誤';
		break;
}
?>