Jpgraph usage

先安裝gd的套件

sudo apt-get install php5-gd

然後下載 jpgraph http://jpgraph.net/download/

然後解壓縮完....傳到RPI...

進到 src/Examples   ... 裡面有很多sample

先來看 combgraphex1.php  例子

修改一下header

require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_line.php');
require_once ('jpgraph/jpgraph_bar.php');
require_once ('jpgraph/jpgraph_utils.inc.php');
require_once ('jpgraph/jpgraph_mgraph.php');

改成

require_once ('../jpgraph.php');
require_once ('../jpgraph_line.php');
require_once ('../jpgraph_bar.php');
require_once ('../jpgraph_utils.inc.php');
require_once ('../jpgraph_mgraph.php');

因為  jpgraph.php 在 上一個資料夾....
其他的檔案也是一樣


然後執行...會遇到這個issue

查了一下google..... 在reference 2 說可以把它先remark...

Open the file ~/public_html/lib/jpgraph/src/gd_image.inc.php, find the functionSetAntiAliasing and comment this line out like this:

再執行一次....會遇到另外一個問題

他在 /usr/share/fonts/truetype 找不到 arial.ttf....

首先先安裝 microsoft  的字型

sudo apt-get install msttcorefonts

裝完之後...他把 arial.ttf  放在   /usr/share/fonts/truetype/msttcorefonts

並不是  /usr/share/fonts/truetype....

所以再來個 ln -s  連結過去...

再執行一次...就可以看到成功的畫面

Reference 1 : http://jpgraph.net/doc/howto1.php

Reference 2 : https://ubuntuincident.wordpress.com/2011/01/28/drawing-graphs-in-php-with-jpgraph/