&reftitle.setup;
&reftitle.required;

If you have the GD library (available at &url.gd;) you will also be able to create and manipulate images.

The format of images you are able to manipulate depend on the version of GD you install, and any other libraries GD might need to access those image formats.

libgd-2.1.0 or higher is required. Alternatively, use the bundled GD library that ships with PHP.

The GD library requires zlib >= 1.2.0.4.

You may wish to enhance GD to handle more image formats.

## Supported image formats

Image format | Library to download | Notes
`gif` |  |
`avif` |  |
`jpeg` | &url.jpeg; | When building the jpeg library (prior to building PHP) you must use the `--enable-shared` option in the configure step. If you do not, you will receive an error saying `libjpeg.(a|so) not found` when you get to the configure step of building PHP.
`png` | &url.libpng; |
`xpm` | &url.libxpm; | It's likely you have this library already available, if your system has an installed X-Environment.
`webp` |  |

You may wish to enhance GD to deal with different fonts. The FreeType 2 library is supported.

&reference.image.configure; &reference.image.ini;
&reftitle.resources;

This extension defines the following resource types:

## List of resource types in GD

Name | Description | Notes
`gd` | Image resource, used by functions like `imagecreatefrompng` | Prior to PHP 8.0.0
`gd font` | Font resource internally created by `imageloadfont` | Prior to PHP 8.1.0