(PHP 4, PHP 5, PHP 7) Draw a string horizontally

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

(PHP 4 >= 4.0.7, PHP 5, PHP 7) Write text to the image using fonts using FreeType 2

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Set the style for line drawing

(PHP 4 >= 4.3.2, PHP 5, PHP 7) Set the flag to save full alpha channel information (as opposed to single-color

(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) Get the index of the color of a pixel

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

(PHP 4, PHP 5, PHP 7) Copy part of an image bool

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