With the development of the Internet era, the amount of data on the website is increasing. In order to better display the data, paging has become an essential function. In front-end development, using jQuery plug-ins to implement paging is a common way, but in actual applications, we also need to pass the page number to the background for data processing. So this article will introduce how to pass the page number in jQuery paging. Go backstage.

1. Basic principles of jQuery paging plug-in

First of all, we need to understand the basic principles of jQuery paging plug-in. The jQuery paging plug-in actually performs paging processing of data, and then renders the paging data onto the page in HTML format. The plug-in realizes page jump and data re-rendering by monitoring the click event of the page number. On this basis, we need to implement the function of passing page number information to the background for processing.

2. Implement the page number transfer to the background

1. Get the current page number

First, we need to get the current page number information so that it can be passed to Backstage. We can add a callback function in the jQuery paging plug-in, obtain the current page number information in this callback function, and store it in a global variable. The code is as follows:

var currentPage = 1; //全局變量，存儲當(dāng)前頁碼信息
$(function() {
    $('#pagination').pagination({
        items: 100,
        onPageClick: function(pageNumber, event) {
            currentPage = pageNumber;
        }
    });
});

2. Transfer page number information to the background

With the current page number information, we need to pass it to the background for processing. Usually, we can use Ajax to send page number information to the background, and the background will perform corresponding data processing after receiving the information. The specific implementation is as follows:

$('#btnSubmit').click(function() {
    $.ajax({
        method: 'POST',
        url: 'handle.php',
        data: {
            page: currentPage
        },
        success: function(response) {
            console.log(response);
        },
        error: function(jqXHR) {
            console.log('請求失敗');
        }
    });
});

In the above code, we transfer the current page number information to the handle.php page in the background by clicking the submit button. The data sent is sent using the POST method, using jQuery's Ajax method. The data parameter contains page number information, the success function is used to handle the return value after success, and the error function is used to handle the request failure.

3. Background processing of page number information

In handle.php, we need to accept and process the page number information passed. The specific implementation code is as follows:

<?php
if(isset($_POST['page'])) {
    $page = $_POST['page'];
    //進(jìn)行相應(yīng)的數(shù)據(jù)處理
}
?>

In the above code, we determine whether the passed data exists. If it exists, the page number information is stored in the $page variable and the corresponding data is processed.

3. Summary

This article introduces how to transfer the page number in jQuery paging to the background for data processing. The main implementation steps include obtaining the current page number information, transferring the page number information to the background, and background processing. Page number information. Through the introduction of this article, we can better understand the working principle of the jQuery paging plug-in and how to process the page number information in paging. I hope it will be helpful to everyone.

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