Changing the style

Although things like thickness can be modified by adjusting the brush, rendering things like dashed-lines require changing the style of the brush.

Styles are defined by an array of allocated colors which represent the desired style which is then registered using the imagesetstyle() function.

<?php
    $dashed = array($black, $black, $black, $white, $white, $white);
?>

Once a style has been defined, it can be used with any GD drawing function by setting the color to IMG_COLOR_STYLED