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How to use PHP and jquery to display the number of people online in real time

2025-01-19 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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This article mainly introduces "how to use PHP and jquery to display the number of people online in real time". In the daily operation, I believe that many people have doubts about how to use PHP and jquery to display the number of people online in real time. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to use PHP and jquery to display the number of people online in real time." Next, please follow the editor to study!

This example assumes that the number of current online users is dynamically displayed on the page (there is no need to refresh the entire page, only locally refresh the dynamic numbers), which is commonly used on some statistical platforms. You only need to define the following structure in the HTML page:

Currently online:

First, we want to define an animation process that uses the animate () function of jQuery to transform from one number to another. The following magic_number () custom function integrates the code as follows:

Function magic_number (value) {var num = $("# number"); num.animate ({count: value}, {duration: 500, step: function () {num.text (String (parseInt (this.count);}});}

Then the update () function uses jQuery's $.getJSON () to send an ajax request to the background number.php, and after getting the corresponding PHP, call magic_number () to show the latest numbers. To see better results, we use setInterval () to set the interval between code execution.

Function update () {$.getJSON ("number.php?jsonp=?", function (data) {magic_number (data.n);});}; setInterval (update, 5000); / / execute update () once every 5 seconds

PHP part

In the actual project, we will use PHP to get the latest data in the database and return it to the front end through PHP. For a better demonstration, this example uses random numbers and returns the js,number.php code to the front end in json format as follows:

$total_data = array ('n'= > rand (0999)); echo $_ GET ['jsonp']. Json_encode ($total_data). ')'

The principle is actually very simple to use js settimeout to load a php file in a few seconds so as to achieve the function of displaying the number of people online in real time.

At this point, the study on "how to use PHP and jquery to display the number of people online in real time" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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