Core PHP Programming, Third Edition

25.5. Stretching Single-Pixel Images

The following technique takes advantage of the behavior of most browsers with the width and height properties of the image tag. It does not require the GD extension, because it doesn't actually manipulate an image. It relies on the browser to stretch an image to match the width and height specified in the IMG tag. This allows you to stretch a single-pixel image into a large bar.

Refer to Listing 25.5. An HTML table is used to line up graph labels with bars. The largest data element will fill 100 percent of the graph width, which is specified by the graphWidthMax variable. Each element is pulled from the data array and used to scale graphWidthMax. This produces a horizontally oriented bar graph, but the same ...