(PHP 4 >= 4.0.6, PHP 5)
imagesetthickness — Set the thickness for line drawing
imagesetthickness() sets the thickness of the lines drawn when drawing rectangles, polygons, ellipses etc. etc. to thickness pixels.
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
Devuelve TRUE si todo se llevó a cabo correctamente, FALSE en caso de fallo.
Note: Esta funcion requiere GD 2.0.1 o posterior.