(PHP 4 >= 4.3.0, PHP 5)imagelayereffect -- Set the alpha blending flag to use the bundled libgd layering effects
This function is currently not documented; only the argument list is available.
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
Note: This function is only available if PHP is compiled with the bundled version of the GD library.
Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).