Php/docs/function.imagesetclip
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imagesetclip
(PHP 7 >= 7.2.0)
imagesetclip — Set the clipping rectangle
说明
imagesetclip
( resource $im
, int $x1
, int $y1
, int $x2
, int $y2
) : bool
imagesetclip() sets the current clipping rectangle, i.e. the area beyond which no pixels will be drawn.
参数
image- 由图象创建函数(例如imagecreatetruecolor())返回的图象资源。
x1- The x-coordinate of the upper left corner.
y1- The y-coordinate of the upper left corner.
x2- The x-coordinate of the lower right corner.
y2- The y-coordinate of the lower right corner.
返回值
成功时返回 true， 或者在失败时返回 false。
