Automattic

Donncha O Caoimh (a11n)

This plugin logs the activity of supported plugins to a file, making it easier to figure out why there’s a problem.
If you have been asked to install this plugin because of a support issue then installing this plugin is just like installing any other plugin. Once installed, go to Settings->WP Logger and enable logging. If you have a number of supported plugins enable the one you are interested in.
Developers who want to use this plugin to add logging to their own plugin should see the Developers section of this documentation.
Mark Jaquith’s <a href="https://wordpress.org/extend/plugins/monitor-pages/" rel="ugc">Monitor Pages</a> plugin was used as a template for this plugin. Thanks Mark!
<h4>Developers</h4>
Other plugins can use this plugin to record important events which are then dumped to a log file. Plugins must add the event to a global array in the following way:
<pre><code>$GLOBALS[ 'wp_log' ][ 'name_of_plugin' ][] = 'Some important event';
</code></pre>
Plugins must also add themselves to a list of enabled plugins. This will make it easier for blog owners to filter out which plugin they want to debug on the settings page. Add and edit the following code so it is executed when the plugin is loaded.
<pre><code>$GLOBALS[ 'wp_log_plugins' ][] = 'name_of_plugin';
</code></pre>
A hypothetical example might be a plugin (let’s call it “Big A”) that uses the output buffer to change the letter “a” to “A”. The events recorded by this might include the following:
<pre><code>$GLOBALS[ 'wp_log' ][ 'big_a' ][] = 'Created output buffer';
$GLOBALS[ 'wp_log' ][ 'big_a' ][] = 'Output buffer callback';
$GLOBALS[ 'wp_log' ][ 'big_a' ][] = 'Replaced a with A in page';
</code></pre>
This plugin takes the “wp_log” array and dumps it to a file in the upload directory of the blog it’s activated on. The file is linked from the plugin settings page and can be deleted on that page too. The file is a simple text file and is not protected in any way so be careful if auth cookies are logged by a plugin.
A “log” function isn’t included but if you want to add one to your plugin check the constant WP_DEBUG_LOG is defined before adding to the log array. If your plugin doesn’t use a class make sure that you call the log function a unique name so it doesn’t conflict with other plugins.
<pre><code>function log( $message ) {
 if ( defined( 'WP_DEBUG_LOG' ) )
 $GLOBALS[ 'wp_log' ][ 'name_of_plugin' ][] = $message;
}
</code></pre>

WP Debug Logger

A plugin that makes it easy to log code activity to a file.

Ming's IT Services Ltd.

A simple visitor management system for small businesses. Let office guests, interview candidates, contractors, and clients check in and out digitally from a tablet or kiosk. Features include visitor logs, search history, responsive design, accessibility support, and receptionist monitoring.
This office visits logbook plugin is for the sign-in and sign-out of office interview, business, meeting, etc. You can add any new visit type categories and new visit types if you want. For example, for hospitals and clinics, you can add new visit types such as surgery, emergency, ICU. For dental offices, you can add new visit types such as wash teeth, root canal, dental implants, wisdom tooth extraction, reconstructive surgery, and cosmetic surgery.
This plugin has the web accessibility feature for the disabled people to listen to the screen reader. The disabled people just need to press the tab key to access the elements on the page. Then use keyboard to input. Then press enter key for submit, reset and cancel. To use this feature, you can download and use any screen reader software such as NVDA (for Windows), VoiceOver (for Apple), etc. Most of this kind of software is free to download and use.
A visit record can be updated only when it is active and timeout is empty. Deleted visits and finished visits are not available for editing.
This plugin stores all data in your own WordPress database. It does not track visitor activity or share your data with any third party, keeping your visit data completely private.
This plugin has an access restriction feature. You can give a user access to the visit landing page by adding the user to the wp_dragonvisitzyx987_users table.
After you are added to the wp_dragonvisitzyx987_users table, you must log in WordPress website to access this plugin’s landing page. On the admin setting page, admin and assigned users can access admin setting page to see table lists.
This plugin uses a responsive design. You can use it from your cellphone, tablet, laptop, and PC. The layout will change accordingly.
For this plugin to get your company’s current local date, you must set the timezone value correctly. You can edit the timezone at Dashboard -> Settings -> General -> Timezone -> check if the value has been set correctly.
By default, a WordPress login session timeout is usually about 2 days if “Remember Me” is not checked. If “Remember Me” is checked, it can last about 14 days. So, a receptionist only needs to log in one time in the morning, and the visitor management system does not need to log in again during the day. This makes this visitor management system perfect for being in a tablet in a kiosk. Guests just go to the tablet and check in.
Documentation file is in the root folder with the name documentation_officevisitslogbook.pdf. Please follow the instructions in the file to install this plugin.
Donate URL link: 
https://paypal.me/mingsitservices?country.x=CA&locale.x=en_US
Documentation:
<a href="https://mingsitservicesfree.infinityfreeapp.com/wp-content/plugins/office-visits-logbook/documentation_officevisitslogbook.pdf" target="_blank" rel="noopener noreferrer nofollow ugc">Click to access documentation_officevisitslogbook.pdf</a>

You can run it on any platform: Windows, Mac, Linux.
There is an advanced version on sale here: 
https://www.codester.com/items/39162/office-visits-logbook-plugin-for-wordpress 
It can export visit records into an Excel file for download. It can also backup your database. The advanced version and this free version have the same database tables and stored procedures. It’s easy to migrate from this free version to the advanced version. Remember to backup your free version database before migration.
The visitor management system market is increasing fast. According to this website https://www.globenewswire.com/news-release/2023/06/27/2695465/0/en/Global-Visitor-Management-System-Market-Size-To-Grow-USD-2-7-Billion-By-2032-CAGR-of-18-4.html, 
Spherical Insights & Consulting published a report saying the global visitor management system market size was valued at USD 1.5 billion in 2022 and the worldwide visitor management system market size is expected to reach USD 2.7 billion by 2032.
This plugin is very popular. It has been downloaded over 4200 times so far: 
https://wordpress.org/plugins/office-visits-logbook/advanced/

Visitor Management System – Office Visitor Check-In Logbook

I do not need paper office visit logbook any more! And I can search office visit history easily. So efficient and easy to use.

Office visit logbook works.

A simple visitor management system for small businesses. Let office guests, interview candidates, contractors, and clients check in and out digitally  …

WP Debug Logger vs Visitor Management System – Office Visitor Check-In Logbook