在JavaScript中使用URL的GET参数 [英] Using the GET parameter of a URL in JavaScript

问题描述

如果我在一个页面上，比如

http://somesite.com/somepage.php?param1=asdf

在该页面的JavaScript中，我想设置一个变量为URL中GET部分的参数值。

所以在JavaScript中：

 <脚本> 
 param1var = ... // ...将被代码替换为从URI获取asdf 
< / script> 
  

...会是什么？

解决方案

以下是一些 示例代码 。

 < script> 
 var param1var = getQueryVariable（param1）; 
 
函数getQueryVariable（变量）{
 var query = window.location.search.substring（1）; 
 var vars = query.split（&）; 
 for（var i = 0; i< vars.length; i ++）{
 var pair = vars [i] .split（=）; 
 if（pair [0] == variable）{
 return pair [1]; 
} 
} 
 alert（'Query Variable'+ variable +'not found'）; 
} 
< / script> 
  

If I am on a page such as

http://somesite.com/somepage.php?param1=asdf

In the JavaScript of that page, I would like to set a variable to the value of the parameter in the GET part of the URL.

So in JavaScript:

<script>
   param1var = ...   // ... would be replaced with the code to get asdf from URI
</script>

What would "..." be?

解决方案

Here's some sample code for that.

<script>
var param1var = getQueryVariable("param1");

function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
  alert('Query Variable ' + variable + ' not found');
}
</script>

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