This class can be used to generate QR Code images using the Google Chart API. It sends a HTTP request to the Google Chart API Web server to request the generation of a PNG image that represents the QR code graphic for a given information snippet. The class can request the generation of QR codes for several content types.
This class can perform several types of image manipulation operations for the GIF, JPEG and PNG formats. It can rescale images to fit in a given width/height, optionally maintaining the original aspect ratio; flip images horizontally or vertically; rotate images by a given angle; and crop images. It does all the error checking.
This function will resize an image to the specified width and height without distorting it and in most cases without adding black regions to the image (by cropping the image to the desired size). It is very useful for creating picture thumbnails of a given size, regardless of the image's original dimensions.
A code sample to watermark uploaded images on the fly. It imprints the specified text over the image using GD-library functions and true type fonts. You can modify the script parameters to change the font, color, opacity, alignment and rotation. You can use any standard true-type font of your choice.