(PHP 4 >= 4.0.1, PECL pdflib >= 1.0.0)
PDF_set_border_dash — Sets dash style of border around links and annotations
The PDF_set_border_dash() function sets the lenght of black and white areas of a dashed line of the suroundig box of links and annotations.
See also PDF_set_border_style(), PDF_set_border_color().