Introduction to the use of jpgraph class library in php_PHP tutorial

With Jpgraph, as long as you understand some of its built-in functions, you can easily draw line charts, column charts, pie charts and other charts.

First make sure that PHP has the Gd2 extension turned on:

Open PHP.ini, locate extension=php_gd2.dll, and delete the semicolon in front of it.

Then download Jpgraph, http://www.aditus.nu/jpgraph/, and extract it to a folder. Such as E:Softwarewebwwwjpgraph.

Open PHP.ini, modify the include_path parameter, add the path of Jpgraph, such as include_path=",;E:Softwarewebwwwjpgraph", and restart the Apache service.

This way the environment is ready.

A routine is attached below.

Copy code The code is as follows:

　require_once '../jpgraph/src /jpgraph.php';
require_once '../jpgraph/src/jpgraph_line.php';
require_once '../jpgraph/src/jpgraph_bar.php';
// y-axis data, to Assignment in array form
　$ydata = array(12,4,9,15,11,10,9,7,15,7);

// Create a Graph class, 350 is the width, 250 is the length, auto: means that the generated cache file name is the file name + extension of the file (.jpg .png .gif...)
$graph = new Graph(350,250,"auto");

//Set the scale type. The x-axis scale can be used as a straight-line scale for text labeling, and the y-axis is a straight-line scale.
　$graph->SetScale("textlin");

// Create a coordinate class and inject y-axis data into
$lineplot=new LinePlot($ydata);

// Set the y-axis connection line to blue
$lineplot->SetColor("blue");

// Inject the coordinate class into the icon class
$graph->Add($lineplot);

// Display graph
$graph->Stroke(); ?>

http://www.bkjia.com/PHPjc/328130.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/328130.htmlTechArticleUsing Jpgraph, as long as you understand some of its built-in functions, you can easily draw line charts, column charts, and pie charts. Diagrams and other charts. First, make sure that PHP has the Gd2 extension turned on: Open PHP.ini and locate...