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PHP5中文手册

ps_circle

(PECL ps:1.1.0-1.3.5)

ps_circle — Draws a circle

说明

bool ps_circle ( resource $psdoc , float $x , float $y , float $radius )

Draws a circle with its middle point at (x , y ). The circle starts and ends at position (x +radius , y ). If this function is called outside a path it will start a new path. If it is called within a path it will add the circle as a subpath. If the last drawing operation does not end in point (x +radius , y ) then there will be a gap in the path.

参数

psdoc

Resource identifier of the postscript file as returned by ps_new().

x

The x-coordinate of the circle's middle point.

y

The y-coordinate of the circle's middle point.

radius

The radius of the circle

返回值

如果成功则返回 TRUE,失败则返回 FALSE