Application example: PHP generates a pChart (with source code) _ PHP Tutorial

Application example: PHP generates a pChart (with source code ). PChart is an open-source chart generation Library, mainly involving three classes: pChart. class, pData. class, pCache. class, which can generate more than 20 simple or complex charts. pChart is an open-source chart generation library that supports the PN help house tutorial. it mainly involves three classes: pChart. class, pData. class, pCache. class, which can generate more than 20 simple or complex charts. it supports PNG, JPG, and GIF common image formats. The data source can be from Database, CSV, or hand-written. To use this PHP program, you need to enable the GD service. let's take a look at the workflow of pChart:

　　

There are three main steps:

1. * Reading is used to generate chart data (databases and files)
2. * Design chart styles (rounded corners, background colors, etc)
3. * Create tags, questions, and legends and generate charts

Here is a simple bar chart:

　　

The code is as follows:

// Standard comprehensions Include ("pChart/pData. class "); Include ("pChart/pChart. class "); // Dataset definition $ DataSet = new pData; // Chart data $ DataSet-> AddPoint (array (,-3,-3, 3, 4), "Serie1 "); $ DataSet-> AddPoint (array (,-, 3), "Serie2 "); $ DataSet-> AddPoint (array (, 2,-1,-4,-,), "Serie3 "); $ DataSet-> AddAllSeries (); $ DataSet-> SetAbsciseLabelSerie (); // Data legend $ DataSet-> SetSerieName ("Microsoft", "Serie1 "); $ DataSet-> SetSerieName ("IBM", "Serie2 "); $ DataSet-> SetSerieName ("Google", "Serie3 "); // Initialise the graph $ Test = new pcharts (700,230 ); // Set the chart size and style $ Test-> setFontProperties ("Fonts/tahoma. ttf", 8 ); $ Test-> setGraphArea (680,200, 30 ); $ Test-> drawFilledRoundedRectangle (693,223, 5,240,240,240 ); $ Test-> drawRoundedRectangle (695,225, 5,230,230,230 ); $ Test-> drawGraphArea (255,255,255, TRUE ); $ Test-> drawScale ($ DataSet-> GetData (), $ DataSet-> getdatadeworkflow (), SCALE_NORMAL, 150,150,150, TRUE, TRUE ); $ Test-> drawGrid (4, TRUE, 230,230,230, 50 ); // Draw the 0 line $ Test-> setFontProperties ("Fonts/MankSans. ttf", 6 ); $ Test-> drawTreshold (0,143, 72, TRUE, TRUE ); // Draw the bar graph // Use drawBarGraph () for the column chart () $ Test-> drawBarGraph ($ DataSet-> GetData (), $ DataSet-> getdatadeworkflow (), TRUE, 80 ); // Finish the graph // Create attributes such as Legend, title, and font $ Test-> setFontProperties ("Fonts/MankSans. ttf", 10 ); $ Test-> drawLegend (596,150, $ DataSet-> getdatadeworkflow (), 255,255,255 ); $ Test-> setFontProperties ("Fonts/MankSans. ttf", 10 ); $ Test-> drawTitle (50, 22, "Example", 50, 50, 50,585 ); // Generate a chart $ ImageFile = "example12.png "; $ Test-> Render ($ imageFile ); Echo ''; ?>

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PChart is an open-source chart generation Library, mainly involving three classes: pChart. class, pData. class, pCache. class, can generate more than 20 simple or complex charts, supports PN...