(PECL ps >= 1.1.0)
ps_set_border_dash — Sets length of dashes for border of annotations
$psdoc, float $black, float $white): boolLinks added with one of the functions ps_add_weblink(), ps_add_pdflink(), etc. will be displayed with a surounded rectangle when the postscript document is converted to pdf and viewed in a pdf viewer. This rectangle is not visible in the postscript document. This function sets the length of the black and white portion of a dashed border line.
psdocResource identifier of the postscript file as returned by ps_new().
blackThe length of the dash.
whiteThe length of the gap between dashes.
成功时返回 true， 或者在失败时返回 false。