Untitled

<!DOCTYPE html>
<html>
  <head>
    <title>Pascal's Triangle</title>
  </head>
  <body>

<?php
if (isset($_REQUEST["lines"]) && int($_REQUEST["lines"]) > 0)
{
    print "<pre>";

    $line = Array(1);

    for ($i = 0; $i < int($_REQUEST["lines"]); $i++)
    {
        print implode(' ', $line)."\n";
        $line[] = 0;
        for ($n = count($line) - 1; $n >= 1; $n--)
            $line[$n] += $line[$n - 1];
    }

    print "</pre>";
    print "<hr>";
}
?>

<form action="#" method="POST">
Number of lines: <input type="text" name="lines">
<input type="submit" value="Go">
</form>

  </body>
</html>