(PHP 5 >= 5.5.0, PHP 7) Scale an image using the given new width and height

(PHP 5 >= 5.5.0, PHP 7) Concat two matrices (as in doing many ops in one go)

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Create a new image from file or URL

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Create a new image from the image stream in the string

(PHP 4, PHP 5, PHP 7) Apply a gamma correction to a GD image

(PHP 5 >= 5.5.0, PHP 7) Set the interpolation method

(PHP 4, PHP 5) Give the bounding box of a text rectangle using PostScript Type1 fonts

(PHP 4 >= 4.0.7, PHP 5, PHP 7) Give the bounding box of a text using fonts via freetype2

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Set the alpha blending flag to use the bundled libgd layering effects

(PHP 4, PHP 5, PHP 7) Give the bounding box of a text using TrueType fonts