Gotphp

This is a barchart generator built using PHP’s GD image library

(GD is normally installed on most PHP builds). Here in this example you can generate barchart .

Example:

Usage & params

In barchart.php, update the variable $f to point to a TTF font file the script should use (one is included in the download ZIP). In this file you can also set other global settings, such as font sizes (variables $fs, $fs2 and $fs3) and colours.

Call the script in the src of an image tag:

<img src=”../path/to/barchart.php?params”>

…where params is a set of property/value pairings from the following:

data (string, required) – a set of number/label pairings separated by a |, and with numbers separated from labels with a colon, e.g. 5:label 1|16:label 2|3:label 3

fontAngle (int, default: -45°) – the angle of the text labels underneath each block

increment (int, default: dyamic) – the script will itself attempt to work out the most suitable numerical increments on the Y axis, depending on the data you pass. If you want to force it to a particular issue, e.g. 10 or 100, pass it here.

chartHeight (int, default: 400) – the height in pixels of the image

numUnitsAboveMax (int, default: 1) – the number of increments above the highest value to display (e.g. if increment is 5 and highest value is 36, the highest increment will be 40). This allows some padding between the top of the highest block and the top of the chart.

yAxisInfo (string) – a legend to be displayed vertically alongside the Y axis, explaining its role

blockWidth (int, default: 30) – the width in pixels of each block

spaceBetweenBlocks (int, default: 0) – the margin in pixels either side of each block

randomColours (bool, default: false) – if true, block colours will be random, not those set in the PHP file

noGrid (bool, default: false) – if true, no grid will appear behind the blocks

gradient (string) – either ‘dark’ or ‘light’. Applies a gradient to the blocks (you can tailor the sensitivity of this in the PHP itself)

Demo

Click here to download source

Original Reference link