I have a website textscloud.com
In this website i make the image with the PHP GD library. Here is a link to a demo:
In this page i allow the user to download the image on which text will pe printed. download link is like
This download.php file has a header for making the image with PHP GD Library and download the file like this
header("Content-type: image/png");
But google didn't crawl these images. Does anyone know the solution? I can't store these image in server.
You don't mention how you are feeding the beast, so I suggest you start by providing google a site map via their webmaster toolkit. You can specifically list the images that you want crawled. Google provides good help articles to get you going.
Google can't index images that are not stored permanently, I'm quite sure it can't even index images without context (i.e. which are not part of a describing/linking page).
You can try to:
Send a cache header to allow caching of the image.
Rewrite the actual url to someting like: http://textscloud.com/get_img/download/VkZaU1FtUXdNVVZWVkZKT1ZWUXdPUT09.png (should match your filename header)
