PHP

008 - constant variables
50
70

<?php
      // 008 - constant variables  
      echo "</br><span class='myheading'>008 - constant variables </span></br>";
       
      define("test",50); // define,value
      echo test;
      define("test1",50);
      $sum = test + 20;
      echo "<br>";
      echo $sum;
      echo "<br>";
    ?>