(PHP 5 >= 5.5.0, PHP 7) Return an image containing the affine tramsformed src image, using an optional clipping

(PHP 4, PHP 5, PHP 7) Enable or disable interlace

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

(PHP 4, PHP 5, PHP 7) Parse a binary IPTC block into single tags.

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

(PHP 5, PHP 7) Applies a filter to an image bool

(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) Write text to the image using fonts using FreeType 2

(PHP 4, PHP 5, PHP 7) Get the index of the specified color

(PHP 4, PHP 5) Free memory used by a PostScript Type 1 font