Web Standards Programmer's Reference: HTML, CSS, JavaScript®, Perl, Python®, and PHP

F.17. Image

Function	Returns	Description
exif_tagname(index)	string	Gets headername for index or false if not defined.
exif_read_data(string filename [, sections_needed [, sub_arrays[, read_thumbnail]]])	array	Reads header data from the JPEG/TIFF image filename and optionally reads the internal thumbnails.
exif_thumbnail(string filename [, &width, &height [, &imagetype]])	string	Reads the embedded thumbnail.
exif_imagetype(string imagefile)	int	Gets the type of an image.
gd_info()	array	Retrieves information about the currently installed GD library.
imageloadfont(string filename)	int	Loads a new font.
imagesetstyle(resource im, array styles)	bool	Sets the line drawing styles for use with imageline and IMG_COLOR_STYLED.
imagecreatetruecolor(int x_size, int y_size)	resource	Creates a new true color image.
imageistruecolor(resource im)	bool	Returns true if the image uses true color.
imagetruecolortopalette(resource im, bool ditherFlag, int colorsWanted)	void	Converts a true color image to a palette-based image with a number of colors, optionally using dithering.
imagecolormatch(resource im1, resource im2)	bool	Makes the colors of the palette version of an image more closely match the true color version.
imagesetthickness(resource im, int thickness)	bool	Sets line thickness for drawing lines, ellipses, rectangles, polygons, and so on.
imagefilledellipse(resource im, int cx, int cy, int w, int h, int color)	bool	Draws an ellipse.
imagefilledarc(resource im, int cx, int cy, int w, int h, int s, int ...