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# ps_setdash

(PECL)

ps_setdash -- Sets appearance of a dashed line

## 说明

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

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

## 参数

`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.

## 返回值

如果成功则返回 `TRUE`，失败则返回 `FALSE`。

## 参见

ps_setpolydash()

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