wpsnoop: fix Zlick Paywall plugin conflicts, errors & issues

When the plugin Zlick Paywall 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 Zlick Paywall, plus learn which plugins and/or themes could be in conflict with Zlick Paywall.


Troubleshooting theme and plugin conflicts is easier when you know what Zlick Paywall 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 Zlick Paywall

Get professional support for Zlick Paywall here

When you need professional help with WordPress: get help here


What does Zlick Paywall version 2.7.3 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for Zlick Paywall to perform differently in your installation, previous versions before 2.7.3 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 2.7.3 of Zlick Paywall 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 Zlick Paywall 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.

Which new files does Zlick Paywall add to WordPress?

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

Type & Path Size Conflicts
.well-known/ 8.90kB The .well-known/ directory has potential conflicts with at least 2 other plugins or themes.
.well-known/apple-developer-merchantid-domain-association 8.90kB The .well-known/apple-developer-merchantid-domain-association file has potential conflicts with at least 2 other plugins or themes.
wp-content/plugins/zlick-paywall/ 76.90kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/admin/ 10.33kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/admin/class-zlick-payments-admin.php 10.25kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/admin/css/ 91.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/admin/css/zlick-payments-admin.css 91.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/assets/ No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/bin/ 5.16kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/bin/install-wp-tests.sh 5.16kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/class-zlick-payments.php 575.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/Gruntfile.js 1.16kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/ 13.56kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/database_handler.php 4.41kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/mixpanel_functions.php 1.98kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/plugin_settings.php 648.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/search_engine.php 2.25kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/stripe_functions.php 1.96kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/user.php 391.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/includes/validate_jwt.php 1.95kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/index.php No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/languages/ 801.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/languages/zlick-payments-it.mo 347.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/languages/zlick-payments-it.po 454.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/LICENSE.txt 17.67kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/package.json 346.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/ 14.93kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/js/ 4.24kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/js/fade.js 613.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/js/zlick-widget.js 3.64kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/shortcodes/ 10.30kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/shortcodes/zlick-widget.php 10.30kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/styles/ 375.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/styles/fade.css 375.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/templates/ 29.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/public/templates/zlick-widget.php 29.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/readme.txt 8.60kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/tests/ 1.14kB No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/tests/bootstrap.php 878.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/tests/test-sample.php 291.00B No known conflicts with other themes or plugins.
wp-content/plugins/zlick-paywall/zlick-payments.php 2.67kB No known conflicts with other themes or plugins.

Which new shortcodes does Zlick Paywall add to WordPress?

ShortCode   Known Plugin or Theme conflicts
[zlick_payment_widget] The zlick_payment_widget shortcode doesn't have any known conflicts with other themes or plugins.
[zp_placeholder] The zp_placeholder shortcode doesn't have any known conflicts with other themes or plugins.

Note: We have not yet checked to see if these shortcodes work as expected in pages, posts, sidebar widgets, or when set as the page title, in content, in the excert, in menus or anywhere else within a WordPress installation. A shortcode could produce errors due to parameters added when it is used, or if the plugin is updated and the format of the shortcode has changed.

Which new database tables are created by the WordPress plugin Zlick Paywall?

Which new options are added to the wp-options table by Zlick Paywall?

What new PHP functions does Zlick Paywall declare when it is active?

Function   Conflicts Common Errors
add_settings_link 32 conflicts Fatal error: Cannot redeclare add_settings_link()
post_article_paid_event 0 conflicts Fatal error: Cannot redeclare post_article_paid_event()
post_saving_keys_event 0 conflicts Fatal error: Cannot redeclare post_saving_keys_event()
zlickpay_add_noarchive_meta 0 conflicts Fatal error: Cannot redeclare zlickpay_add_noarchive_meta()
zlickpay_authenticate_article 0 conflicts Fatal error: Cannot redeclare zlickpay_authenticate_article()
zlickpay_base64_url_encode 0 conflicts Fatal error: Cannot redeclare zlickpay_base64_url_encode()
zlickpay_cookie_is_purchased_article 0 conflicts Fatal error: Cannot redeclare zlickpay_cookie_is_purchased_article()
zlickpay_cookie_is_valid_subscription 0 conflicts Fatal error: Cannot redeclare zlickpay_cookie_is_valid_subscription()
zlickpay_cookie_register_article 0 conflicts Fatal error: Cannot redeclare zlickpay_cookie_register_article()
zlickpay_cookie_register_subscription 0 conflicts Fatal error: Cannot redeclare zlickpay_cookie_register_subscription()
zlickpay_cookie_unregister_all 0 conflicts Fatal error: Cannot redeclare zlickpay_cookie_unregister_all()
zlickpay_create_apple_verification_file 0 conflicts Fatal error: Cannot redeclare zlickpay_create_apple_verification_file()
zlickpay_find_number_paragraphs 0 conflicts Fatal error: Cannot redeclare zlickpay_find_number_paragraphs()
zlickpay_get_client_ip 0 conflicts Fatal error: Cannot redeclare zlickpay_get_client_ip()
zlickpay_get_current_user_id 0 conflicts Fatal error: Cannot redeclare zlickpay_get_current_user_id()
zlickpay_get_jwt_payload 0 conflicts Fatal error: Cannot redeclare zlickpay_get_jwt_payload()
zlickpay_get_options_data 0 conflicts Fatal error: Cannot redeclare zlickpay_get_options_data()
zlickpay_is_bot_useragent 0 conflicts Fatal error: Cannot redeclare zlickpay_is_bot_useragent()
zlickpay_is_search_engine 0 conflicts Fatal error: Cannot redeclare zlickpay_is_search_engine()
zlickpay_jwt_sign 0 conflicts Fatal error: Cannot redeclare zlickpay_jwt_sign()
zlickpay_limit_content 0 conflicts Fatal error: Cannot redeclare zlickpay_limit_content()
zlickpay_sanitize_price 0 conflicts Fatal error: Cannot redeclare zlickpay_sanitize_price()
zlickpay_shortcode_resource 0 conflicts Fatal error: Cannot redeclare zlickpay_shortcode_resource()
zlickpay_validate_sign 0 conflicts Fatal error: Cannot redeclare zlickpay_validate_sign()
zlickpay_widget_link_shortcode 0 conflicts Fatal error: Cannot redeclare zlickpay_widget_link_shortcode()
zlickpay_widget_placeholder 0 conflicts Fatal error: Cannot redeclare zlickpay_widget_placeholder()

Using Zlick Paywall 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 Zlick Paywall from the command line with WP-CLI

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

wp plugin install zlick-paywall


How to activate Zlick Paywall from the command line with WP-CLI

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

wp plugin install zlick-paywall --activate


How to reinstall Zlick Paywall from the command line with WP-CLI

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

wp plugin install zlick-paywall --force


How to update Zlick Paywall to the latest version from the command line with WP-CLI

wp plugin update zlick-paywall


How to delete Zlick Paywall from the command line with WP-CLI

wp plugin delete zlick-paywall

Where can you download earlier versions of Zlick Paywall?

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 Zlick Paywall 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 Zlick Paywall

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 Zlick Paywall. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.