imagesetstyle() sets the style to be used by all line drawing functions (such as imageline() and imagepolygon()) when drawing with the special color IMG_COLOR_STYLED or lines of images with color IMG_COLOR_STYLEDBRUSHED.
The style parameter is an array of pixels. Following example script draws a dashed line from upper left to lower right corner of the canvas:
See also imagesetbrush(), imageline().
Note: This function was added in PHP 4.0.6