(PHP 4 >= 4.0.7, PHP 5)
imagegd вЂ” Output GD image to browser or file
Outputs a GD image to the given filename .
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
The path to save the file to. If not set or NULL, the raw image stream will be outputted directly.
Returns TRUE on success or FALSE on failure.
Note: The GD format is commonly used to allow fast loading of parts of images. Note that the GD format is only usable in GD-compatible applications.