Can you really have an exterior image (presen, digital or png) right into a GD produced image?

what I am attempting to do is obtain the latest wordpress blog publish (like 5) and generate a picture from this. I must range from the title and also the image submitted using the blog publish.

Yes. Use among the imagecreatefromXXXXX functions to import the exterior image right into a GD image object, then make use of the imagecopy function or much like mix it together with your produced image.

For convenience, the GD function reference is here.