(PHP 4 >= 4.3.2, PHP 5)
imageistruecolor вЂ” Finds whether an image is a truecolor image
imageistruecolor() finds whether the image image is a truecolor image.
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
Returns TRUE if the image is truecolor, FALSE otherwise.
Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).