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In this article, the editor introduces in detail "how to use jQuery's post". The content is detailed, the steps are clear, and the details are handled properly. I hope this article "how to use jQuery's post" can help you solve your doubts.

Overview of get and post requests

# jQuery# in Http, there are a variety of request methods, such as get, post, etc., but the most commonly used is to obtain data and submit data, which is a get request and a post request.

Note: HTTP requests are requests sent by the client to the server. For example, use your own computer to open a browser and enter the URL of "Baidu". At this time, you will initiate a HTTP request from your computer to Baidu's server.

This article is devoted to the $.post () method.

$.post () method

Using the $.post () method, you can submit the content of the html client to the server, and you can also store the data from Post in the database.

Note that the query string (name / value pair) is sent in the HTTP message body of the POST request:

POST / test/demo_form.php HTTP/1.1

Host: w3cschool.com

Name1=value1&name2=value2

Some other comments about the POST request:

POST requests will not be cached

POST requests are not retained in the browser history

POST cannot be collected as a bookmark

There is no requirement for data length in POST request

The $.post () method submits data to the server through a HTTP POST request.

Syntax:

$.post (URL,data,callback)

The required URL parameters specify the URL you want to request.

The optional data parameter specifies the data to be sent with the request.

The optional callback parameter is the name of the function to be executed after a successful request.

The following example uses $.post () to send data along with the request:

Example

$("button") .click (function () {

$.get ("demo_test.php", function (data,status) {

Alert ("data:" + data + "\ nState:" + status)

});

});

Give it a try »

The first parameter of $.post () is the URL ("demo_test_post.php") that we want to request.

Then we send the data along with the request (name and url).

The PHP script in "demo_test_post.php" reads these parameters, processes them, and returns the results.

The third argument is the callback function. The first callback parameter stores the content of the requested page, while the second parameter stores the status of the request.

Tip: this PHP file ("demo_test_post.php") looks like this:

The difference between the get method and the post method GETPOST back button / refresh harmless data will be resubmitted (the browser should inform the user that the data will be resubmitted). Bookmarks can be collected as bookmarks are not collectible as bookmark caches can be cached and encoding types application/x-www-form-urlencodedapplication/x-www-form-urlencoded or multipart/form-data cannot be cached. Use multiple encoding for binary data. The history parameters are retained in the browser history. Parameters are not saved in the browser history. The limit on the length of the data is yes. When sending data, the GET method adds data to the URL; the length of the URL is limited (the maximum length of the URL is 2048 characters). There is no limit. The restriction on data types allows only ASCII characters. There is no limit. Binary data is also allowed. Security compared to POST, GET is less secure because the data sent is part of URL.

Never use GET when sending passwords or other sensitive information! POST is more secure than GET because parameters are not saved in browser history or web server logs. Visibility data is visible to everyone in URL. The data is not displayed in URL. After reading this, the article "how to use jQuery's post" has been introduced. If you want to master the knowledge points of this article, you still need to practice and use it yourself. If you want to know more about related articles, welcome to follow the industry information channel.

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