百度统计图表Echarts的php实现类，支持柱形图、线形图、饼形图

感谢原作者 chenliujin 。这次修改后能支持柱形图、线形图、饼形图，并且带有demo数据。能正常显示。
/**
 * 百度数据统计图表echart的PHP实现类
 * 
 * 原作者： 
 * @author:	chenliujin	<liujin.chen@qq.com> 
 * @since 	2013-12-12 
 *  
 * 修改者：
 * @author:	iamlintao	<http://www.iamlintao.com>
 * @since:	2014-06-25
 * @version:
 * @revision:
 * 
 * 			修改后支持 柱形图(bar)、线形图(line)、饼形图(pie)
 * 
 * @example:
 * 
 * 		HTML代码部分：
 * 			<script src="js/esl.js"></script>
 * 			<body>
				<!-- 线形图、柱形图显示 -->
				<div id="chartArea" style="height:300px;border:1px solid #ccc;padding:10px;"></div>
				<!-- 饼形图显示 -->
				<div id="pieArea" style="height:300px;border:1px solid #ccc;padding:10px;"></div>
			</body>
			
		PHP代码部分：
		
		//  柱形图、线形图模拟数据
		$option = array(
			"legend"=>array("邮件营销","联盟广告","视频广告","直接访问","搜索引擎"),
			"xaxis"=>array("type"=>"category","boundaryGap"=>"true","data"=>array("周一","周二","周三","周四","周五","周六","周日")),		
			"series"=>array(
						array("name"=>"邮件营销","type"=>"bar","stack"=>"总量","data"=>array("120","132","101","134","90","230","210")),					
						array("name"=>"联盟广告","type"=>"bar","stack"=>"总量","data"=>array("220","182","191","234","290","330","310")),				
						array("name"=>"视频广告","type"=>"bar","stack"=>"总量","data"=>array("150","232","201","154","190","330","410")),				
						array("name"=>"直接访问","type"=>"bar","stack"=>"总量","data"=>array("320","332","301","334","390","330","320")),					
						array("name"=>"搜索引擎","type"=>"bar","stack"=>"总量","data"=>array("820","932","901","934","1290","1330","1320")),			
					),
			);

		$ec = new Echarts();
		echo $ec->show('chartArea', $option);	// 显示在指定的dom节点上

		// 饼形图模拟数据
		$optionPie = array(
				"legend"=>array("邮件营销","联盟广告","视频广告","直接访问","搜索引擎"),
				"series"=>array(
						array("name"=>"邮件营销","type"=>"pie","stack"=>"总量",
								"data"=>array(
										array("value"=>"335","name"=>"直接访问"),
										array("value"=>"310","name"=>"邮件营销"),
										array("value"=>"234","name"=>"联盟广告"),
										array("value"=>"135","name"=>"视频广告"),
										array("value"=>"1548","name"=>"搜索引擎"),
								),
						),
				),
		);
		
		$ec = new Echarts();
		echo $ec->show('pieArea', $optionPie);	// 显示在指定的dom节点上
 */

class Echarts{

	 public static function show($id, array $data){
 	
 		$xaxis = "";
 		$series = "";
    		
		if (empty($data)) {        	
			$data = array(
                'legend' => array(
                    'data' => array('-')
                ),
                'xaxis' => array(
                    'type' => 'category',
                    'boundaryGap' => 'false',
                    'data' => array('')
                ),
                'series' => array(
                    array(
                        'name' => '-',
                        'type' => 'line',
                        'itemStyle' => "{normal: {areaStyle: {type: 'default'}}}",
                        'data' => array()
                    ),
                )
            );
        }

		foreach ($data as $key => $value) {
			switch ($key) {
				case 'legend':
					foreach ($value as $k => $v) {
						switch ($k) {
							case 'data':
								$legend = $k . ':' . json_encode($v);
								break;
						}
					}
					break;
					
				case 'xaxis':
					foreach ($value as $k => $v) {
						switch ($k) {
							case 'type':
								$xaxis[] = $k . ":'" . $v . "'";
								break;
							case 'boundaryGap':
								$xaxis[] = $k . ':' . $v;
								break;
							case 'data':
								$xaxis[] = $k . ':' . json_encode($v);
								break;
						}
					}
					$xaxis = '{' . implode(', ', $xaxis) . '}';
					break;
					
				case 'series':
					foreach ($value as $list) {
						$tmp = array();
						foreach ($list as $k => $v) {
							switch ($k) {
								case 'name':
								case 'type':
									$tmp[] = $k . ":'" . $v . "'";
									break;
								case 'itemStyle':
									$tmp[] = $k . ':' . $v;
									break;
								case 'data':
									$tmp[] = $k . ':' . json_encode($v);
							}
						}
						$series[] = '{' . implode(', ', $tmp) . '}';
					}
					$series = implode(', ', $series);
					break;
			}
		}

		$script = <<<eof
            <script type="text/javascript">
            // Step:3 conifg ECharts's path, link to echarts.js from current page.
            // Step:3 为模块加载器配置echarts的路径，从当前页面链接到echarts.js，定义所需图表路径

			// 把所需图表指向单文件
            require.config({
                paths:{
                    echarts:'./js/echarts',
                    'echarts/chart/bar' : './js/echarts',	
                    'echarts/chart/line': './js/echarts',
					'echarts/chart/pie': './js/echarts'
                }
            });

            // Step:4 require echarts and use it in the callback.
            // Step:4 动态加载echarts然后在回调函数中开始使用，注意保持按需加载结构定义图表路径

			// 按需加载所需图表
            require(
                [
                    'echarts',
                    'echarts/chart/bar',
                    'echarts/chart/line',
 					'echarts/chart/pie'
                ],
                function(ec) {
                    var myChart = ec.init(document.getElementById('$id'));
                    var option = {
                        title : {
                            text: '',
                            subtext: ''
                        },
                        tooltip : {
                            trigger: 'axis'
                        },
                        legend: {
                            $legend
                        },
                        toolbox: {
                            show : true,
                            feature : {
                                mark : true,
                                dataView : {readOnly: false},
                                magicType:['line', 'bar'],
                                restore : true
                            }
                        },
                        calculable : true,
                        xAxis : [$xaxis],
                        yAxis : [{type : 'value'}],
                        series : [$series]
                    };

                    myChart.setOption(option);
                }
            );
            </script>
eof;

		echo $script;
	}
}