ps_open_image
说明
int ps_open_image ( resource psdoc, string type, string source, string data, int lenght, int width, int height, int components, int bpc, string params )Reads an image which is already available in memory. The parameter source is currently not evaluated and assumed to be memory.
返回值
Returns identifier of image or zero in case of an error. The identifier is a positive number greater than 0.