wpsnoop: fix LinOTP authentication plugin conflicts, errors & issues

When the plugin LinOTP authentication conflicts or throws a PHP error we hope wpsnoop can help you to fix the issue quickly.

Discover which shortcodes wp-options PHP functions database tables and files are created by LinOTP authentication, plus learn which plugins and/or themes could be in conflict with LinOTP authentication.

Troubleshooting theme and plugin conflicts is easier when you know what LinOTP authentication leaves behind after uninstalling it from a WordPress installation, there is a list down below for your convenience.

Expert advice is recommended if you are not technically proficient with PHP, MySQL etc. View support options for LinOTP authentication

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What does LinOTP authentication version 1.0 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for LinOTP authentication to perform differently in your installation, previous versions before 1.0 may have created a different set of shortcodes, used different function names or could have created entirely different database tables to store settings and operate. This is not an exhaustive list but shows how version 1.0 of LinOTP authentication behaves when installed and removed on a clean installation of WordPress.

We have not tested individual shortcodes, features or settings of this plugin but instead have concentrated on the potential for obvious errors and conflicts which can occur, if you need help with the plugin in your local installation you can get WordPress help and support for LinOTP authentication by clicking here.

Our testing covered the free version of this plugin there may or may not be a paid version or premium version available for purchase that unlocks additional features and could behave in a slightly or very different manner.

Summary of WordPress plugin analysis: LinOTP authentication

Plugin Slug: linotp Internal ID: 41324 Addon Type: Plugin Version: 1.0 Price: Free Source: WordPress.org Files: 4 (8.66kB) Short Codes: [ / ] 0 Database Tables: 0 Function Count: 5 Code Review: Search Provit

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Which new files does LinOTP authentication add to WordPress?

This section will populate with a table showing an icon, size and filepath.

The plugin LinOTP authentication added 4 new files when it was installed with WP-CLI in our WordPress test environment.

Type & Path	Size	Conflicts
wp-content/plugins/linotp/	8.66kB	No known conflicts with other themes or plugins.
wp-content/plugins/linotp/linotp-auth.php	6.69kB	No known conflicts with other themes or plugins.
wp-content/plugins/linotp/README.md	0.98kB	No known conflicts with other themes or plugins.
wp-content/plugins/linotp/README.txt	0.98kB	No known conflicts with other themes or plugins.

Which new shortcodes does LinOTP authentication add to WordPress?

The plugin LinOTP authentication did not add any shortcodes when it was installed with WP-CLI in our WordPress test environment.

Which new database tables are created by the WordPress plugin LinOTP authentication?

LinOTP authentication did not create any new database tables when it was installed. It is possible that the plugin creates new database tables after an initial setup or configuration or after some period of use.

Which new options are added to the wp-options table by LinOTP authentication?

When LinOTP authentication was activated and loaded for the first time it created 4 new options in the wp_options table. Any known conflicts will be shown in red.

Option Name		Known Conflicts
linotp_realm		The linotp_realm option doesn't have any known conflicts with other themes or plugins.
(empty string)
linotp_server		The linotp_server option doesn't have any known conflicts with other themes or plugins.
(empty string)
linotp_verify_host		The linotp_verify_host option doesn't have any known conflicts with other themes or plugins.
0
linotp_verify_peer		The linotp_verify_peer option doesn't have any known conflicts with other themes or plugins.
0

During use LinOTP authentication may or may not create more options depending on how the plugin is configured and depending on which other themes and plugins are active in your specific hosting environment.

After disabling and deleting LinOTP authentication there were 5 options still present in the wp-options table:

linotp_realm
linotp_server
linotp_verify_host
linotp_verify_peer
recently_activated

Contact LinOTP authentication experts for help

What new PHP functions does LinOTP authentication declare when it is active?

Installing LinOTP authentication added 5 new functions to Wordpress at run-time. These functions are internal and generally aren't meant to be used except by developpers who wish to interface with the plugin to enhance or alter its behavior.

Function	Conflicts	Common Errors
wp_authenticate	18 conflicts	Fatal error: Cannot redeclare wp_authenticate()
linotp_auth_activate	0 conflicts	Fatal error: Cannot redeclare linotp_auth_activate()
linotp_auth_add_menu	0 conflicts	Fatal error: Cannot redeclare linotp_auth_add_menu()
linotp_auth_display_options	0 conflicts	Fatal error: Cannot redeclare linotp_auth_display_options()
linotp_auth_init	0 conflicts	Fatal error: Cannot redeclare linotp_auth_init()

Using LinOTP authentication from the command line with WP-CLI

The following commands are provided for convenience and should only be used if you understand how WP-CLI works. These commands refer to a single WordPress instance and may need to be modified if you are working with a Multisite installation.

How to install LinOTP authentication from the command line with WP-CLI

Navigate to the root of your WordPress installation and type the following command:

wp plugin install linotp

How to activate LinOTP authentication from the command line with WP-CLI

To immediately activate LinOTP authentication after WP-CLI downloads the latest version you can use the following command:

wp plugin install linotp --activate

How to reinstall LinOTP authentication from the command line with WP-CLI

To force a reinstallation of LinOTP authentication which overwrites the current plugin without asking for confirmation you can use the following command:

wp plugin install linotp --force

How to update LinOTP authentication to the latest version from the command line with WP-CLI

wp plugin update linotp

How to delete LinOTP authentication from the command line with WP-CLI

wp plugin delete linotp

Where can you download earlier versions of LinOTP authentication?

Whenever possible you should use the latest version of plugins and themes, however if you have recently updated and discovered that you need to install an earlier version you may be able to download other versions of LinOTP authentication from the WordPress repository by visiting this link.

Please note that installing earlier versions of a theme or plugin is not generally a recommended course of action for most users and could re-introduce security, stability or other issues in LinOTP authentication

About our testing enviroment

Tests were conducted using Apache 2.4.29, PHP 7.2 on Ubuntu 18.04, MySQL 5.7.33 and WordPress 5.9

It is very possible that different versions of PHP such as PHP 8.0, PHP 7.4, or PHP 7.3 could behave differently with LinOTP authentication. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.