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The GD is a graphics library which allows you to create your own graphics for drawing figures and text.

Once you specify GD library on your server you can call various functions.

These functions render figures:

  • ImageLine
  • ImageRectangle
  • ImagePolygon
  • ImageArc

These functions do not render immediately but they do alter the behavior of subsequent actions:

  • ImageCreate
  • ImageColorAllocate
  • ImageFill