wpsnoop: fix Casper theme conflicts, errors & issues

When the theme Casper 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 Casper, plus learn which plugins and/or themes could be in conflict with Casper.


Troubleshooting theme and plugin conflicts is easier when you know what Casper 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 Casper

Get professional support for Casper here

When you need professional help with WordPress: get help here


What does Casper version 1.1.5 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for Casper to perform differently in your installation, previous versions before 1.1.5 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 1.1.5 of Casper behaves when installed and removed on a clean installation of WordPress.

We have not tested individual shortcodes, features or settings of this theme 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 Casper by clicking here.

Our testing covered the free version of this theme 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 Casper add to WordPress?

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

Type & Path Size Conflicts
wp-content/themes/casper/ 1.18MB No known conflicts with other themes or plugins.
wp-content/themes/casper/404.php 937.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/archive.php 2.89kB No known conflicts with other themes or plugins.
wp-content/themes/casper/changelog.txt 1.57kB No known conflicts with other themes or plugins.
wp-content/themes/casper/comments.php 2.50kB No known conflicts with other themes or plugins.
wp-content/themes/casper/content-none.php 1.05kB No known conflicts with other themes or plugins.
wp-content/themes/casper/content-page.php 3.22kB No known conflicts with other themes or plugins.
wp-content/themes/casper/content-single.php 3.52kB No known conflicts with other themes or plugins.
wp-content/themes/casper/content.php 2.10kB No known conflicts with other themes or plugins.
wp-content/themes/casper/css/ 93.34kB No known conflicts with other themes or plugins.
wp-content/themes/casper/css/admin.css 1.08kB No known conflicts with other themes or plugins.
wp-content/themes/casper/css/custom-editor-style.css No known conflicts with other themes or plugins.
wp-content/themes/casper/css/rtl.css 8.20kB No known conflicts with other themes or plugins.
wp-content/themes/casper/css/style.css 84.07kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/ 654.74kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/fa.eot 54.69kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/fa.svg 280.28kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/fa.ttf 109.53kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/fa.woff 63.92kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/ge-ss-med.eot 30.26kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/ge-ss-med.svg 71.63kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/ge-ss-med.ttf 30.02kB No known conflicts with other themes or plugins.
wp-content/themes/casper/fonts/ge-ss-med.woff 14.41kB No known conflicts with other themes or plugins.
wp-content/themes/casper/footer.php 860.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/functions.php 7.71kB No known conflicts with other themes or plugins.
wp-content/themes/casper/Gruntfile.js 4.57kB No known conflicts with other themes or plugins.
wp-content/themes/casper/header.php 10.03kB No known conflicts with other themes or plugins.
wp-content/themes/casper/img/ 8.83kB No known conflicts with other themes or plugins.
wp-content/themes/casper/img/404-ghost.png 3.26kB No known conflicts with other themes or plugins.
wp-content/themes/casper/img/[email protected] 5.57kB No known conflicts with other themes or plugins.
wp-content/themes/casper/inc/ 27.86kB No known conflicts with other themes or plugins.
wp-content/themes/casper/inc/custom-header.php 3.11kB No known conflicts with other themes or plugins.
wp-content/themes/casper/inc/customizer.php 17.78kB No known conflicts with other themes or plugins.
wp-content/themes/casper/inc/extras.php 2.28kB No known conflicts with other themes or plugins.
wp-content/themes/casper/inc/jetpack.php 392.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/inc/template-tags.php 4.30kB No known conflicts with other themes or plugins.
wp-content/themes/casper/index.php 1.05kB No known conflicts with other themes or plugins.
wp-content/themes/casper/js/ 7.46kB No known conflicts with other themes or plugins.
wp-content/themes/casper/js/customizer.js 3.81kB No known conflicts with other themes or plugins.
wp-content/themes/casper/js/main.js 3.66kB No known conflicts with other themes or plugins.
wp-content/themes/casper/languages/ 6.72kB No known conflicts with other themes or plugins.
wp-content/themes/casper/languages/casper.pot 6.47kB No known conflicts with other themes or plugins.
wp-content/themes/casper/languages/readme.txt 253.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/license.txt 17.67kB No known conflicts with other themes or plugins.
wp-content/themes/casper/logo.png 28.47kB No known conflicts with other themes or plugins.
wp-content/themes/casper/package.json 1.75kB No known conflicts with other themes or plugins.
wp-content/themes/casper/page.php 710.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/README.md 3.37kB No known conflicts with other themes or plugins.
wp-content/themes/casper/readme.txt 1.95kB No known conflicts with other themes or plugins.
wp-content/themes/casper/rtl.css 4.01kB No known conflicts with other themes or plugins.
wp-content/themes/casper/screenshot.png 145.77kB No known conflicts with other themes or plugins.
wp-content/themes/casper/search.php 828.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/sidebar.php 333.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/single.php 534.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/src/ 108.83kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/img/ 11.37kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/img/404-ghost.png 3.59kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/img/[email protected] 7.77kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/js/ 6.90kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/js/casper.js 2.70kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/js/jquery.fitvids.js 2.68kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/js/navigation.js 827.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/src/js/skip-link-focus-fix.js 733.00B No known conflicts with other themes or plugins.
wp-content/themes/casper/src/less/ 90.56kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/less/admin.less 1.26kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/less/fa.css 39.74kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/less/normalize.css 7.37kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/less/rtl.less 8.49kB No known conflicts with other themes or plugins.
wp-content/themes/casper/src/less/style.less 33.71kB No known conflicts with other themes or plugins.
wp-content/themes/casper/style.css 56.56kB No known conflicts with other themes or plugins.

Which new shortcodes does Casper add to WordPress?

Which new database tables are created by the WordPress theme Casper?

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

Option Name   Known Conflicts
current_theme Potential conflict with 8753 plugins or themes
theme_mods_twentytwentytwo Potential conflict with 8767 plugins or themes
theme_switched Potential conflict with 8753 plugins or themes
theme_mods_casper The theme_mods_casper option doesn't have any known conflicts with other themes or plugins.

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

What new PHP functions does Casper declare when it is active?

Function   Conflicts Common Errors
new_excerpt_more 105 conflicts Fatal error: Cannot redeclare new_excerpt_more()
casper_add_editor_styles 0 conflicts Fatal error: Cannot redeclare casper_add_editor_styles()
casper_admin_css 0 conflicts Fatal error: Cannot redeclare casper_admin_css()
casper_admin_header_image 0 conflicts Fatal error: Cannot redeclare casper_admin_header_image()
casper_admin_header_style 0 conflicts Fatal error: Cannot redeclare casper_admin_header_style()
casper_body_classes 0 conflicts Fatal error: Cannot redeclare casper_body_classes()
casper_categorized_blog 0 conflicts Fatal error: Cannot redeclare casper_categorized_blog()
casper_category_transient_flusher 0 conflicts Fatal error: Cannot redeclare casper_category_transient_flusher()
casper_custom_header_setup 0 conflicts Fatal error: Cannot redeclare casper_custom_header_setup()
casper_customize_preview_js 0 conflicts Fatal error: Cannot redeclare casper_customize_preview_js()
casper_customize_register 0 conflicts Fatal error: Cannot redeclare casper_customize_register()
casper_customizer_head 0 conflicts Fatal error: Cannot redeclare casper_customizer_head()
casper_header_style 0 conflicts Fatal error: Cannot redeclare casper_header_style()
casper_jetpack_setup 0 conflicts Fatal error: Cannot redeclare casper_jetpack_setup()
casper_page_menu_args 0 conflicts Fatal error: Cannot redeclare casper_page_menu_args()
casper_paging_nav 0 conflicts Fatal error: Cannot redeclare casper_paging_nav()
casper_post_nav 0 conflicts Fatal error: Cannot redeclare casper_post_nav()
casper_posted_on 0 conflicts Fatal error: Cannot redeclare casper_posted_on()
casper_sanitize_checkbox 0 conflicts Fatal error: Cannot redeclare casper_sanitize_checkbox()
casper_sanitize_color 0 conflicts Fatal error: Cannot redeclare casper_sanitize_color()
casper_sanitize_email 0 conflicts Fatal error: Cannot redeclare casper_sanitize_email()
casper_sanitize_footer 0 conflicts Fatal error: Cannot redeclare casper_sanitize_footer()
casper_sanitize_meta 0 conflicts Fatal error: Cannot redeclare casper_sanitize_meta()
casper_sanitize_text 0 conflicts Fatal error: Cannot redeclare casper_sanitize_text()
casper_sanitize_uri 0 conflicts Fatal error: Cannot redeclare casper_sanitize_uri()
casper_scripts 0 conflicts Fatal error: Cannot redeclare casper_scripts()
casper_setup 0 conflicts Fatal error: Cannot redeclare casper_setup()
casper_setup_author 0 conflicts Fatal error: Cannot redeclare casper_setup_author()
casper_widgets_init 0 conflicts Fatal error: Cannot redeclare casper_widgets_init()
casper_wp_title 0 conflicts Fatal error: Cannot redeclare casper_wp_title()

Using Casper 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 Casper from the command line with WP-CLI

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

wp theme install casper


How to activate Casper from the command line with WP-CLI

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

wp theme install casper --activate


How to reinstall Casper from the command line with WP-CLI

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

wp theme install casper --force


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

wp theme update casper


How to delete Casper from the command line with WP-CLI

wp theme delete casper --force

Where can you download earlier versions of Casper?

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 Casper 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 Casper

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