This article mainly introduces the effect of using Jpgraph to create a line chart in PHP, and analyzes the principles, implementation steps and related operating techniques of using Jpgraph in PHP to draw a line chart in the form of examples. Friends in need can refer to the following
The example in this article describes the use of Jpgraph in PHP to create a line chart effect. Share it with everyone for your reference, the details are as follows:
In business operations, it is often necessary to collect statistics on various data. Using charts to dynamically analyze the data in different data tables can make the data display more intuitive.
Example: Apply Jpgraph technology to draw a line chart containing two book sales trends.
In order to use the function of Jpgraph, first import the Jpgraph class library in the program, then create two arrays to represent the annual sales of the two books, create an object of the Graph class, and use the created array as a parameter to create Two objects of LinePlot class. Set parameters such as title, scale, background color, and line color of the statistical chart, and add two LinePlot objects to the statistical chart object.
The process is as follows:
(1) Import the Jpgraph class library and straight line drawing function into the program.
require_once 'jpgraph/src/jpgraph.php'; require_once 'jpgraph/src/jpgraph_line.php';
(2) Create statistical data and save it to a one-dimensional array.
$data1 = array(89, 78, 99, 65, 92, 85, 85, 55, 64, 79, 85, 98);//设置统计数据 $data2 = array(68, 70, 69, 80, 50, 60, 75, 65, 75, 65, 80, 89);//设置统计数据
(3) Create a statistical chart object and set the scale style of the coordinates
$graph = new Graph(600, 300);//创建统计图对象 $graph->SetScale('textlin');//设置刻度样式 $graph->SetY2Scale('lin'); $graph->SetShadow();//设置背景带阴影 $graph->img->SetMargin(40, 50, 20, 70);// 设置图表灰度四周边距,顺序为左右上下 $graph->title->Set(iconv('utf-8', 'GB2312//IGNORE', '图书销售走势表'));//设置走势图的标题
(4) Create a LinePlot object and add the created object to the object of the statistical chart.
$lineplot1 = new LinePlot($data1);//建立LinePlot对象 $lineplot2 = new LinePlot($data2);//建立LinePlot对象 $graph->Add($lineplot1); $graph->AddY2($lineplot2);
(5) Set the title content and text style of the statistical chart and axis, and output the statistical chart
$graph->xaxis->title->Set(iconv('utf-8', 'GB2312//IGNORE', "月份"));//设置x轴的标题 $graph->yaxis->title->Set(iconv('utf-8', 'GB2312//IGNORE', "book A 销售金额(万元)"));//设置y轴的标题 $graph->y2axis->title->Set(iconv('utf-8', 'GB2312//IGNORE', "book B 销售金额(万元)"));//设置y轴的标题 $graph->y2axis->title->SetMargin(20);//设置右边的title到图的距离 $graph->title->SetFont(FF_SIMSUN, FS_BOLD);//设置字体 $graph->yaxis->title->SetFont(FF_SIMSUN, FS_BOLD); $graph->y2axis->title->SetFont(FF_SIMSUN, FS_BOLD); $graph->xaxis->title->SetFont(FF_SIMSUN, FS_BOLD); $lineplot1->SetColor('red');//设置颜色 $lineplot2->SetColor('blue'); $lineplot1->SetLegend('book A');//绑定 $lineplot2->SetLegend('book B'); $graph->legend->SetLayout(LEGEND_HOR); $graph->legend->Pos(0.4, 0.95, 'center', 'bottom'); //图例文字框的位置 0.4,0.95 是以右上角为基准的,0.4是距左右距离,0.95是上下距离。 $graph->Stroke();//输出
The running results are as follows:
The above is the entire content of this article, I hope it will be helpful to everyone's study.
Related recommendations:
php graphicsjpgraphDetailed operation explanation
php Advanced article on using Jpgraph to draw coordinate charts
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php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。


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