PHP mysql Highcharts generate pie chart_jquery

Mysql

First we create a chart_pie table as statistical data.

-- 
-- 表的结构 `chart_pie` 
-- 
 
CREATE TABLE IF NOT EXISTS `chart_pie` ( 
 `id` int(11) NOT NULL AUTO_INCREMENT, 
 `title` varchar(30) NOT NULL, 
 `pv` int(10) NOT NULL, 
 PRIMARY KEY (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=7 ; 
 
-- 
-- 转存表中的数据 `chart_pie` 
-- 
 
INSERT INTO `chart_pie` (`id`, `title`, `pv`) VALUES 
(1, '百度', 1239), 
(2, 'google', 998), 
(3, '搜搜', 342), 
(4, '必应', 421), 
(5, '搜狗', 259), 
(6, '其他', 83);

PHP

In pie.php we need to generate data for the front-end call:

$query = mysql_query("select * from chart_pie"); 
while($row = mysql_fetch_array($query)){ 
 $arr[] = array( 
  $row['title'],intval($row['pv']) 
 ); 
} 
$data = json_encode($arr);
jQuery
$(function() { 
 $('#highcharts').highcharts({ 
  chart: { 
   renderTo: 'chart_pie', 
   //饼状图关联html元素id值 
   defaultSeriesType: 'pie', 
   //默认图表类型为饼状图 
   plotBackgroundColor: '#ffc', 
   //设置图表区背景色 
   plotShadow: true //设置阴影 
  }, 
  title: { 
   text: '搜索引擎统计分析' //图表标题 
  }, 
  credits: { 
   text: 'jb51.net' 
  }, 
  tooltip: { 
   formatter: function() { //鼠标滑向图像提示框的格式化提示信息 
    return '<b>' + this.point.name + '</b>: ' + twoDecimal(this.percentage) + ' %'; 
   } 
  }, 
  plotOptions: { 
   pie: { 
    allowPointSelect: true, 
    //允许选中，点击选中的扇形区可以分离出来显示 
    cursor: 'pointer', 
    //当鼠标指向扇形区时变为手型（可点击） 
    //showInLegend: true, //如果要显示图例，可将该项设置为true 
    dataLabels: { 
     enabled: true, 
     //设置数据标签可见，即显示每个扇形区对应的数据 
     color: '#000000', 
     //数据显示颜色 
     connectorColor: '#999', 
     //设置数据域扇形区的连接线的颜色 
     style: { 
      fontSize: '12px' //数据显示的大小 
     }, 
     formatter: function() { //格式化数据 
      return '<b>' + this.point.name + '</b>: ' + twoDecimal(this.percentage) + ' %'; 
      //return '<b>' + this.point.name + '</b>: ' + this.y ; 
     } 
    } 
   } 
  }, 
  series: [{ //数据列 
   name: 'search engine', 
   data: data //核心数据列来源于php读取的数据并解析成JSON 
  }] 
 }); 
});

In addition, when formatting data, if you want to display a percentage, you can use this.percentage. Highcharts will automatically convert integers into percentages. If you want to display the amount of data, use this.y directly.
The percentage code is as follows:

formatter: function() { //格式化数据 
 return '<b>' + this.point.name + '</b>: ' + twoDecimal(this.percentage) + ' %'; 
}

The actual data is like this:

formatter: function() { //格式化数据 
 return '<b>' + this.point.name + '</b>: ' + this.y ; 
}

Finally we need to keep two decimal places, the code is posted below:

function twoDecimal(x) { //保留2位小数 
 var f_x = parseFloat(x); 
 if (isNaN(f_x)) { 
  alert('错误的参数'); 
  return false; 
 } 
 var f_x = Math.round(x * 100) / 100; 
 var s_x = f_x.toString(); 
 var pos_decimal = s_x.indexOf('.'); 
 if (pos_decimal < 0) { 
  pos_decimal = s_x.length; 
  s_x += '.'; 
 } 
 while (s_x.length <= pos_decimal + 2) { 
  s_x += '0'; 
 } 
 return s_x; 
}

Bar charts, pie charts, curve charts, etc. are all the same.

The above is the entire content of this article, I hope you all like it.