ps_setdash

(PECL ps >= 1.1.0)

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.

成功时返回 TRUE，或者在失败时返回 FALSE.