(PHP 4 >= 4.3.2, PHP 5, PHP 7) Allocate a color for an image

(PHP 4 >= 4.3.2, PHP 5, PHP 7) Should antialias functions be used or not

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

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get the index of the specified color + alpha or its closest possible alternative

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

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

(PHP 5 >= 5.1.0, PHP 7) Apply a 3x3 convolution matrix, using coefficient and offset

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

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

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