(PHP 4, PHP 5, PHP 7) Output image to browser or file

(PHP 4, PHP 5, PHP 7) Write text to the image using TrueType fonts

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

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

(PHP 4, PHP 5, PHP 7) De-allocate a color for an image

(PHP 5 >= 5.2.2, PHP 7) Captures the whole screen

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

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

(PHP 4, PHP 5) Load a PostScript Type 1 font from file

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