ps_setdash

(PECL ps:1.1.0-1.3.5)

ps_setdash — Sets appearance of a dashed line

bool ps_setdash ( resource $psdoc , float $on , float $off )

Sets the length of the black and white portions of a dashed line.

psdoc: Resource identifier of the postscript file as returned by ps_new().
on: The length of the dash.
off: The length of the gap between dashes.

如果成功则返回 TRUE，失败则返回 FALSE。