Get URL parameters & values with jQuery

原文: http://jquery-howto.blogspot.jp/2009/09/get-url-parameters-values-with-jquery.html

In this post, I would like to share a little jQuery code snippet that makes getting URL parameters and their values more convenient.

Recently, while working on one of my projects, I needed to read and get parameter values from URL string of the current page that was constructed and sent by PHP script. I came across this short and sweet JavaScript code snippet by Roshambo that does just that.

// Read a page‘s GET URL variables and return them as an associative array.function getUrlVars(){    var vars = [], hash;    var hashes = window.location.href.slice(window.location.href.indexOf(‘?‘) + 1).split(‘&‘);    for(var i = 0; i < hashes.length; i++)    {        hash = hashes[i].split(‘=‘);        vars.push(hash[0]);        vars[hash[0]] = hash[1];    }    return vars;}

The function returns an array/object with your URL parameters and their values. For example, consider we have the following URL:

http://www.example.com/?me=myValue&name2=SomeOtherValue

Calling getUrlVars() function would return you the following array:

{    "me"    : "myValue",    "name2" : "SomeOtherValue"}

To get a value of first parameter you would do this:

var first = getUrlVars()["me"];

// To get the second parametervar second = getUrlVars()["name2"];

To make the script syntax to look more jQuery like syntax I rewrote it as an extension for jQuery:

$.extend({  getUrlVars: function(){    var vars = [], hash;    var hashes = window.location.href.slice(window.location.href.indexOf(‘?‘) + 1).split(‘&‘);    for(var i = 0; i < hashes.length; i++)    {      hash = hashes[i].split(‘=‘);      vars.push(hash[0]);      vars[hash[0]] = hash[1];    }    return vars;  },  getUrlVar: function(name){    return $.getUrlVars()[name];  }});

Now, if you include the above code in your javascript file, you can get URL parameter values in the following way:

// Get object of URL parametersvar allVars = $.getUrlVars();

// Getting URL var by its namvar byName = $.getUrlVar(‘name‘);