Contoh script KONSTANTA sederhana php

Contoh SCRIPT KONSTANTA "sederhana".

<?php

define ("rs", "Rumus SEGITIGA");

$ab=8;

$ac=10;

$bc=6;

$k=$ab+$ac+$bc;

$l=0.5*$bc*$ab;

echo rs;

echo "<br><br>Keliling : AB + AC + BC";

echo "<br>Contoh: ";

echo "<br>AB = $ab";

echo "<br>AC = $ac";

echo "<br>BC = $bc";

echo "<br>Keliling : $ab + $ac + $bc = $k";

echo "<br><br>Luas Segitga : 1/2 x alas(BC) x tinggi(AB)";

echo "<br>Jadi: 1/2 x $bc x $ab = $l";

?>

Script Konstanta harus memakai "define" untuk menggantikan $.