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

  print "<table border>";
  print "<tr><td>X<td>X+10";

  show(123456789, 10);
  show(PHP_INT_MAX, 10);
  show(-PHP_INT_MAX-1, 10);

  print "</table>";  
?>