'http://www.slashdot.org','caption'=>'Slashdot'));
$b = new node('B', array('url'=>"javascript:alert('hey!')",'caption'=>'hey!'));
$c = new node('C');
$d = new node('D');
$e = new node('E');
$f = new node('F');
$g = new node('G');
$t = new tree($c, array($c, $d, $f));
$t = new tree($c, array($t, $d, $f));
$t = new tree($c, array($t, $d, $f));
$t = new tree($c, array($t, $d, $f));
$t = new tree($c, array($t, $d, $f));
$t = new tree($d, array($t, $e));
$t = new tree($b, array($t, $e));
$t = new tree($a, array($t, $c));
$image = $t->render();
imagepng($image, 'tree.png');
?>
Source
Example
image_map('tree');
// $image = $t->test_map();
// header('Content-type: image/png');
// imagepng($image);
?>