当我尝试访问<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<link rel="shortcut icon" type="image/x-icon" href="https://production-assets.codepen.io/assets/favicon/favicon-8ea04875e70c4b0bb41da869e81236e54394d63638a1ef12fa558a4a835f1164.ico" />
<link rel="mask-icon" type="" href="https://production-assets.codepen.io/assets/favicon/logo-pin-f2d2b6d2c61838f7e76325261b7195c27224080bc099486ddd6dccb469b8e8e6.svg" color="#111" />
<title>CodePen - Stacked Bar Chart D3</title>
</head>
<body translate="no" >
<div id='stacked-bar'></div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/d3/4.5.0/d3.min.js'></script>
<script>
var initStackedBarChart = {
draw: function(config) {
let me = this;
let domEle = config.element;
let stackKey = config.key;
let data = config.data;
let margin = {top: 20, right: 20, bottom: 30, left: 60};
let parseDate = d3.timeParse("%m/%Y");
let width = 390 - margin.left - margin.right;
let height = 500 - margin.top - margin.bottom;
let xScale = d3.scaleLinear().rangeRound([0, width]);
let yScale = d3.scaleBand().rangeRound([height, 0]).padding(0.1);
let color = d3.scaleOrdinal(d3.schemeCategory20);
svg = d3.select("#"+domEle).append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var stack = d3.stack()
.keys(stackKey)
/*.order(d3.stackOrder)*/
.offset(d3.stackOffsetNone);
var layers= stack(data);
data.sort(function(a, b) { return b.total - a.total; });
yScale.domain(data.map(function(d) { return parseDate(d.date); }));
xScale.domain([0, d3.max(layers[layers.length - 1], function(d) { return d[0] + d[1]; }) ]).nice();
var layer = svg.selectAll(".layer")
.data(layers)
.enter().append("g")
.attr("class", "layer")
.style("fill", function(d, i) { return color(i); });
//How can I animate the rectangles growing?
layer.selectAll("rect")
.data(function(d) { return d; })
.enter().append("rect")
.attr("y", function(d) { return yScale(parseDate(d.data.date)); })
.attr("x", function(d) { return 0; return xScale(d[0]); })
.attr("height", yScale.bandwidth())
.attr("width", function(d) { return 0; return xScale(d[1]) - xScale(d[0]) })
.transition()
.duration(500)
.delay(function(d,i) { return i * 1000 })
.attr("x", function(d) { return xScale(d[0]); })
.attr("width", function(d) { return xScale(d[1]) - xScale(d[0]) })
svg.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + (height+5) + ")")
.call(xAxis);
svg.append("g")
.attr("class", "axis axis--y")
.attr("transform", "translate(0,0)")
.call(yAxis);
}
}
var data = [{"date":"4/1854","total":8571,"disease":1,"wounds":0,"other":5},{"date":"5/1854","total":23333,"disease":12,"wounds":0,"other":9},{"date":"6/1854","total":28333,"disease":11,"wounds":0,"other":6},{"date":"7/1854","total":28772,"disease":359,"wounds":0,"other":23},{"date":"8/1854","total":30246,"disease":828,"wounds":1,"other":30},{"date":"9/1854","total":30290,"disease":788,"wounds":81,"other":70},{"date":"10/1854","total":30643,"disease":503,"wounds":132,"other":128},{"date":"11/1854","total":29736,"disease":844,"wounds":287,"other":106},{"date":"12/1854","total":32779,"disease":1725,"wounds":114,"other":131},{"date":"1/1855","total":32393,"disease":2761,"wounds":83,"other":324},{"date":"2/1855","total":30919,"disease":2120,"wounds":42,"other":361},{"date":"3/1855","total":30107,"disease":1205,"wounds":32,"other":172},{"date":"4/1855","total":32252,"disease":477,"wounds":48,"other":57},{"date":"5/1855","total":35473,"disease":508,"wounds":49,"other":37},{"date":"6/1855","total":38863,"disease":802,"wounds":209,"other":31},{"date":"7/1855","total":42647,"disease":382,"wounds":134,"other":33},{"date":"8/1855","total":44614,"disease":483,"wounds":164,"other":25},{"date":"9/1855","total":47751,"disease":189,"wounds":276,"other":20},{"date":"10/1855","total":46852,"disease":128,"wounds":53,"other":18},{"date":"11/1855","total":37853,"disease":178,"wounds":33,"other":32},{"date":"12/1855","total":43217,"disease":91,"wounds":18,"other":28},{"date":"1/1856","total":44212,"disease":42,"wounds":2,"other":48},{"date":"2/1856","total":43485,"disease":24,"wounds":0,"other":19},{"date":"3/1856","total":46140,"disease":15,"wounds":0,"other":35}];
var key = ["wounds", "other", "disease"];
initStackedBarChart.draw({
data: data,
key: key,
element: 'stacked-bar'
});
</script>
</body>
</html>
时，请求返回NULL。我有一个简单的页面，我用它进行测试。我不知道为什么我无法获取这些网址参数？
$_GET档案：
.htaccess Options +MultiViews
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)$ $1.php [NC]
RewriteRule ^article/([A-Za-z0-9-]+)/([0-9]+)/?$ article?title=$1&page=$2 [NC,QSA,L]
档案：
article.php结果：
<?php
var_dump($_GET);
echo "<br>";
var_dump($_GET["title"]);
echo "<br>";
var_dump($_GET["page"]);
echo "<br>";
?>
<!DOCTYPE html>
<html>
<body>
<a href="article/myTitle/3/">Link</a>
</body>
</html>
答案 0 :(得分：1)
Options +MultiViews RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^([^\.]+)$ $1.php [NC] RewriteRule ^article/([A-Za-z0-9-]+)/([0-9]+)/?$ article?title=$1&page=$2 [NC,QSA,L]
这里有一些问题。您可能与MultiViews发生冲突。这是加载article.php（没有查询字符串参数），而不是您追加RewriteRule扩展名的第一个.php。但是对于article/myTitle/3/之类的请求，此指令也不正确 - 因为这会导致article/myTitle/3/.php，这显然不正确。
您可能还有其他要求，但要使这个具体示例有效，您只需要：
Options -MultiViews
RewriteEngine On
RewriteRule ^article/([A-Za-z0-9-]+)/([0-9]+)/?$ article.php?title=$1&page=$2 [QSA,L]
请注意，这会重写为实际目标（article.php）而不是article（这将需要额外的重写）。如果您特别需要NC标记不区分大小写（您已经在正则表达式中检查a-z和A-Z），请仅使用expected ACK/NAK标记。