WordPress: Build a user login counter plugin

WordPress is the most popular content management system (CMS) on the web today. Forbes data shows that more than 60 million websites around the world run above WordPress, which is enough to prove its leading position in the CMS field. One of the big advantages of WordPress is its huge plug-in library. Want to build an e-commerce store? WooCommerce can satisfy you. Need a recruitment portal? WP Job Manager is your choice.

This tutorial will guide you to create a plugin that counts the number of times a user logs into a WordPress website and displays login statistics in the Custom column in the User List page.

Plugin Development

Most WordPress plug-in files are PHP files, located in the /wp-content/plugins/ directory. In this case, the file name is wordpress-login-count.php. I'm assuming you are familiar with connecting to your server using FTP/SFTP/SCP or SSH.

If you want to follow along, please create a plug-in PHP filewordpress-login-count.php. A complete plug-in download link will be provided at the end of this tutorial.

First, include the plugin header file. Without header files, WordPress will not recognize the plugin.

<?php /*
Plugin Name: WordPress 用戶登錄計(jì)數(shù)器
Plugin URI: http://sitepoint.com
Description: 統(tǒng)計(jì)用戶登錄WordPress賬戶的次數(shù)。
Version: 1.0
Author: Agbonghama Collins
Author URI: http://w3guy.com
License: GPL2
*/

Then, add the PHP namespace and create the plugin class as follows:

namespace Sitepoint\WordPressPlugin;

class Login_Counter {
// ...

plugin will enter the init() method.

public function init() {
        add_action( 'wp_login', array( $this, 'count_user_login' ), 10, 2 );

        add_filter( 'manage_users_columns', array( $this, 'add_stats_columns' ) );

        add_action( 'manage_users_custom_column', array( $this, 'fill_stats_columns' ), 10, 3 );
    }

wp_loginOperation hook is triggered by WordPress when the user logs in, so this is the appropriate hook we use to count the number of user logins.

The following count_user_login() functions count.

    /**
     * 將用戶登錄計(jì)數(shù)保存到數(shù)據(jù)庫。
     *
     * @param string $user_login 用戶名
     * @param object $user WP_User 對象
     */
    public function count_user_login( $user_login, $user ) {

        if ( ! empty( get_user_meta( $user->ID, 'sp_login_count', true ) ) ) {
            $login_count = get_user_meta( $user->ID, 'sp_login_count', true );
            update_user_meta( $user->ID, 'sp_login_count', ( (int) $login_count + 1 ) );
        } else {
            update_user_meta( $user->ID, 'sp_login_count', 1 );
        }
    }

Code Description: First, we check whether the user has an empty sp_login_count meta field. If false, we get the previously saved login count and add it to 1; if true, it means that the user is logging in for the first time. Therefore, the value 1 will be saved to the user's metafield.

manage_users_custom_column filter is used to add an extra column to the WordPress user list page that will output the number of times the user logs in (see screenshot above).

fill_stats_columns() function is attached to manage_users_custom_column and add a new column.

    /**
     * 使用值填充統(tǒng)計(jì)列。
     *
     * @param string $empty
     * @param string $column_name
     * @param int $user_id
     *
     * @return string|void
     */
    public function fill_stats_columns( $empty, $column_name, $user_id ) {

        if ( 'login_stat' == $column_name ) {
            if ( get_user_meta( $user_id, 'sp_login_count', true ) !== '' ) {
                $login_count = get_user_meta( $user_id, 'sp_login_count', true );

                return "<strong>$login_count</strong>";
            } else {
                return __( 'No record found.' );
            }
        }

        return $empty;
    }

Code Description: The first if condition ensures that we are indeed in the login_stat column. Next if condition checks whether the user has a login count. If true, return the login count; otherwise, return the text "No record found".

get_instance() method creates a singleton instance of the class and then calls the init() method to register various operations and filter hooks.

Finally, we will call the get_instance() method to run the PHP class.

Login_Counter::get_instance();

It's done! We have finished encoding the login counter plugin.

Summary

To learn more about how the plugin is built and implement it in your WordPress site, download it from GitHub. (GitHub link should be added here)

I hope this will help you learn how to develop plugins for WordPress.

Please share your thoughts in the comments.

FAQs (FAQs) on building WordPress User Login Counter Plugin

How to use the current user ID in HTML code for any post?

To use the current user ID in the HTML code of any post, you need to use the WordPress function get_current_user_id(). This function will return the ID of the currently logged in user. You can then use this ID in your HTML code. For example, you can use it to display personalized messages to users. Here is an example of how to use it:

<?php /*
Plugin Name: WordPress 用戶登錄計(jì)數(shù)器
Plugin URI: http://sitepoint.com
Description: 統(tǒng)計(jì)用戶登錄WordPress賬戶的次數(shù)。
Version: 1.0
Author: Agbonghama Collins
Author URI: http://w3guy.com
License: GPL2
*/

Why does the wp_signon() function not work?

wp_signon() Functions may not work for a number of reasons. A common reason is that you try to use it after sending the header. This function must be called before any output is sent to the browser or it will not work. Another reason might be that the credentials passed to the function are incorrect. Make sure the username and password are correct and that the user exists in your WordPress database.

How to create a login counter using PHP?

To create a login counter using PHP, you can use a session or cookie. When the user logs in, you can increment the counter stored in the session or cookie. Here is a simple example of using a session:

namespace Sitepoint\WordPressPlugin;

class Login_Counter {
// ...

What is the Counter Number Showcase plugin and how does it work?

Counter Number Showcase plugin is a WordPress plugin that allows you to display counters on your website. You can use it to display various statistics such as the number of users, posts, comments, etc. The plugin provides a short code that you can use in your post or page to display the counter. You can use the plugin's settings to customize the appearance of the counter.

How to track the number of user logins in WordPress?

To track the number of user logins in WordPress, you can use the wp_login operation hook. This hook is triggered whenever the user logs in. You can use it to increment the counters stored in user metadata. Here is an example:

public function init() {
        add_action( 'wp_login', array( $this, 'count_user_login' ), 10, 2 );

        add_filter( 'manage_users_columns', array( $this, 'add_stats_columns' ) );

        add_action( 'manage_users_custom_column', array( $this, 'fill_stats_columns' ), 10, 3 );
    }

In this example, the track_user_logins() function is called whenever the user logs in. It retrieves the current login count from the user's metadata, increments it, and then updates the user's metadata with the new count.

Note: The above code example has been adjusted to make it more in line with WordPress encoding specifications and readability. Actual plug-in code may require more comprehensive error handling and security considerations. Be sure to carefully test your plug-ins in production environments.

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