This example uses code originally posted at http://php.net/manual/en/function.imagettfbbox.php#75407. This was suggested by comment on StackOverflow.
View sourceImage size: Array ( [0] => 25 [1] => 4 [2] => 361 [3] => 4 [4] => 361 [5] => -126 [6] => 25 [7] => -126 [x] => -26 [width] => 336 [y] => 125 [height] => 129 )