<?php
  function show($x, $y) {
    print "<tr><td>" . $x . "<td>" . $y . "<td>" . ($x == $y ? "Same" : "Different");
  }

  print "<table border>";
  print "<tr><td>X<td>Y<td>X == Y";

  show("abc", "abc");
  show("xyz", "" . "xyz");

  print "</table>";  
?>