jQuery implements sharing between different Sessions

In web development, we often encounter situations that require sharing operations between different Sessions. However, by default, each Session is independent of each other and cannot share data. At this time, you need to borrow jQuery to realize data transfer between Sessions.

jQuery is an excellent JavaScript library with very powerful DOM operations and Ajax functions. It can also conveniently operate client-side storage technologies such as cookies. Here we will elaborate on the theme of realizing data sharing between sessions with jQuery.

1. The basic concept of Session

Session is a way used by the Web server to record user status. In a web application, each user creates an independent Session when connecting to the server. After the server processes the request, it stores the corresponding information in the Session so that the information can be used again during the next request.

Session can be stored in a variety of ways, including storage in memory, hard disk or database. Among them, the method of storing Session in memory is the most common, but its shortcomings are also obvious: each server process has its own Session space and cannot be shared. Therefore, some other technical means need to be used to achieve data sharing between different Sessions.

2. jQuery realizes data sharing between Sessions

1. Using Cookie

In jQuery, you can use Cookie to realize data sharing between different Sessions. The specific method is as follows:

//Set Cookie in the current Session
$.cookie('mySession', 'data');

//Read Cookie in other Session
var data = $.cookie('mySession');

Here is a brief introduction to the $.cookie function, which is provided by the jQuery plug-in jquery.cookie.js. Before using this plug-in, you need to introduce jquery.cookie.js:

$.cookie( ) function has the following parameters:

name: indicates the cookie name.

value: Indicates the value of the cookie.

options: Indicates some parameters of Cookie, including expiration time, path, domain, etc.

2. Using Ajax

Another way to achieve data sharing between different Sessions is to use Ajax technology. The specific method is as follows:

//Submit the data as a parameter to the server when sending the request
$.ajax({

url: 'example.php',
data: {'mySession': 'data'},
success: function(response) {
    //处理响应结果
}

});

//In Read the parameters when accepting the request
var data = $_POST['mySession'];

This method needs to be processed on the server side. When receiving a request, the server needs to read relevant information from the request parameters and then respond.

3. Summary

Through the above two methods, we can achieve data sharing between different Sessions. The specific method selection needs to be judged based on the actual situation. If the amount of data is relatively large, it is recommended to use Ajax technology for delivery; if the data is relatively small and needs to be stored for a long time, you can consider using Cookie technology. In short, we can use jQuery to make web development more convenient and faster.

The above is the detailed content of jQuery implements sharing between different Sessions. For more information, please follow other related articles on the PHP Chinese website!