wpsnoop: fix HTTP Headers plugin conflicts, errors & issues

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

Troubleshooting theme and plugin conflicts is easier when you know what HTTP Headers 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 HTTP Headers

Get professional support for HTTP Headers here

When you need professional help with WordPress: get help here

What does HTTP Headers version 1.18.5 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for HTTP Headers to perform differently in your installation, previous versions before 1.18.5 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 1.18.5 of HTTP Headers 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 HTTP Headers 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: HTTP Headers

Plugin Slug: http-headers Internal ID: 34733 Addon Type: Plugin Version: 1.18.5 Price: Free Source: WordPress.org Files: 73 (345.96kB) Short Codes: [ / ] 0 Database Tables: 0 Function Count: 74 Code Review: Search Provit

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Which new files does HTTP Headers add to WordPress?

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

The plugin HTTP Headers added 73 new files when it was installed with WP-CLI in our WordPress test environment.

Type & Path	Size	Conflicts
.htaccess	2.04kB	The .htaccess file has potential conflicts with at least 76 other plugins or themes.
wp-content/plugins/http-headers/	343.92kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/assets/	19.02kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/assets/scripts.js	12.61kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/assets/styles.css	6.41kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/http-headers.php	58.89kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/index.php	27.00B	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/languages/	84.21kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/languages/http-headers-bg_BG.mo	31.38kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/languages/http-headers-bg_BG.po	35.52kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/languages/http-headers.pot	17.31kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/LICENSE.txt	18.00kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/README.txt	9.23kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/uninstall.php	261.00B	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/	154.29kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/access-control-allow-credentials.php	1.73kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/access-control-allow-headers.php	3.34kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/access-control-allow-methods.php	1.93kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/access-control-allow-origin.php	3.84kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/access-control-expose-headers.php	3.34kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/access-control-max-age.php	1.42kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/advanced.php	5.93kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/age.php	1.21kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/ajax-inspect.php	3.26kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/ajax.php		No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/cache-control.php	2.73kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/category.php	7.45kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/clear-site-data.php	2.08kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/connection.php	1.62kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/content-encoding.php	4.38kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/content-security-policy.php	4.06kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/content-type.php	3.08kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/cookie-security.php	3.03kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/cross-origin-embedder-policy.php	1.81kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/cross-origin-opener-policy.php	2.41kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/cross-origin-resource-policy.php	1.79kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/custom-headers.php	2.73kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/dashboard.php	2.05kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/expect-ct.php	2.49kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/expires.php	3.88kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/feature-policy.php	3.75kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/header.php	549.00B	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/	15.98kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/breadcrumbs.inc.php	1.05kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/config.inc.php	5.32kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/csp-inc.inc.php	260.00B	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/csp-sandbox.inc.php	931.00B	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/csp-src.inc.php	2.68kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/csp-sri.inc.php	614.00B	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/csp-text.inc.php	387.00B	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/includes/options.inc.php	4.79kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/index.php	2.65kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/inspect.php	1.71kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/manual.php	2.60kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/nel.php	3.96kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/p3p.php	6.89kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/permissions-policy.php	4.23kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/pragma.php	1.55kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/referrer-policy.php	1.74kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/report-to.php	8.51kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/strict-transport-security.php	2.80kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/timing-allow-origin.php	1.97kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/vary.php	2.11kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/www-authenticate.php	3.63kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-content-type-options.php	1.85kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-dns-prefetch-control.php	2.05kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-download-options.php	1.68kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-frame-options.php	1.89kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-permitted-cross-domain-policies.php	1.61kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-powered-by.php	1.69kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-robots-tag.php	3.85kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-ua-compatible.php	1.50kB	No known conflicts with other themes or plugins.
wp-content/plugins/http-headers/views/x-xss-protection.php	1.95kB	No known conflicts with other themes or plugins.

Which new shortcodes does HTTP Headers add to WordPress?

The plugin HTTP Headers 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 HTTP Headers?

HTTP Headers 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 HTTP Headers?

When HTTP Headers was activated and loaded for the first time it created 109 new options in the wp_options table. Any known conflicts will be shown in red.

Option Name		Known Conflicts
hh_access_control_allow_credentials		The hh_access_control_allow_credentials option doesn't have any known conflicts with other themes or plugins.
0
hh_access_control_allow_credentials_value		The hh_access_control_allow_credentials_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_allow_headers		The hh_access_control_allow_headers option doesn't have any known conflicts with other themes or plugins.
0
hh_access_control_allow_headers_custom		The hh_access_control_allow_headers_custom option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_allow_headers_value		The hh_access_control_allow_headers_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_allow_methods		The hh_access_control_allow_methods option doesn't have any known conflicts with other themes or plugins.
0
hh_access_control_allow_methods_value		The hh_access_control_allow_methods_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_allow_origin		The hh_access_control_allow_origin option doesn't have any known conflicts with other themes or plugins.
0
hh_access_control_allow_origin_url		The hh_access_control_allow_origin_url option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_allow_origin_value		The hh_access_control_allow_origin_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_expose_headers		The hh_access_control_expose_headers option doesn't have any known conflicts with other themes or plugins.
0
hh_access_control_expose_headers_custom		The hh_access_control_expose_headers_custom option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_expose_headers_value		The hh_access_control_expose_headers_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_access_control_max_age		The hh_access_control_max_age option doesn't have any known conflicts with other themes or plugins.
0
hh_access_control_max_age_value		The hh_access_control_max_age_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_age		The hh_age option doesn't have any known conflicts with other themes or plugins.
0
hh_age_value		The hh_age_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_cache_control		The hh_cache_control option doesn't have any known conflicts with other themes or plugins.
0
hh_cache_control_value		The hh_cache_control_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_clear_site_data		The hh_clear_site_data option doesn't have any known conflicts with other themes or plugins.
0
hh_clear_site_data_value		The hh_clear_site_data_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_connection		The hh_connection option doesn't have any known conflicts with other themes or plugins.
0
hh_connection_value		The hh_connection_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_content_encoding		The hh_content_encoding option doesn't have any known conflicts with other themes or plugins.
0
hh_content_encoding_ext		The hh_content_encoding_ext option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_content_encoding_module		The hh_content_encoding_module option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_content_encoding_value		The hh_content_encoding_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_content_nel		The hh_content_nel option doesn't have any known conflicts with other themes or plugins.
0
hh_content_nel_value		The hh_content_nel_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_content_security_policy		The hh_content_security_policy option doesn't have any known conflicts with other themes or plugins.
0
hh_content_security_policy_report_only		The hh_content_security_policy_report_only option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_content_security_policy_value		The hh_content_security_policy_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_content_type		The hh_content_type option doesn't have any known conflicts with other themes or plugins.
0
hh_content_type_value		The hh_content_type_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_cookie_security		The hh_cookie_security option doesn't have any known conflicts with other themes or plugins.
0
hh_cookie_security_value		The hh_cookie_security_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_custom_headers		The hh_custom_headers option doesn't have any known conflicts with other themes or plugins.
0
hh_custom_headers_value		The hh_custom_headers_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_expect_ct		The hh_expect_ct option doesn't have any known conflicts with other themes or plugins.
0
hh_expect_ct_enforce		The hh_expect_ct_enforce option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_expect_ct_max_age		The hh_expect_ct_max_age option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_expect_ct_report_uri		The hh_expect_ct_report_uri option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_expires		The hh_expires option doesn't have any known conflicts with other themes or plugins.
0
hh_expires_type		The hh_expires_type option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_expires_value		The hh_expires_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_feature_policy		The hh_feature_policy option doesn't have any known conflicts with other themes or plugins.
0
hh_feature_policy_feature		The hh_feature_policy_feature option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_feature_policy_origin		The hh_feature_policy_origin option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_feature_policy_value		The hh_feature_policy_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_htaccess_path		The hh_htaccess_path option doesn't have any known conflicts with other themes or plugins.
/mnt/ramdisk/working/empty-wp-5-9-34733/.htaccess
hh_htdigest_path		The hh_htdigest_path option doesn't have any known conflicts with other themes or plugins.
/mnt/ramdisk/working/empty-wp-5-9-34733/.hh-htdigest
hh_htpasswd_path		The hh_htpasswd_path option doesn't have any known conflicts with other themes or plugins.
/mnt/ramdisk/working/empty-wp-5-9-34733/.hh-htpasswd
hh_method		The hh_method option doesn't have any known conflicts with other themes or plugins.
htaccess
hh_p3p		The hh_p3p option doesn't have any known conflicts with other themes or plugins.
0
hh_p3p_value		The hh_p3p_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_permissions_policy		The hh_permissions_policy option doesn't have any known conflicts with other themes or plugins.
0
hh_permissions_policy_feature		The hh_permissions_policy_feature option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_permissions_policy_origin		The hh_permissions_policy_origin option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_permissions_policy_value		The hh_permissions_policy_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_pragma		The hh_pragma option doesn't have any known conflicts with other themes or plugins.
0
hh_pragma_value		The hh_pragma_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_public_key_pins		The hh_public_key_pins option doesn't have any known conflicts with other themes or plugins.
0
hh_public_key_pins_max_age		The hh_public_key_pins_max_age option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_public_key_pins_report_only		The hh_public_key_pins_report_only option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_public_key_pins_report_uri		The hh_public_key_pins_report_uri option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_public_key_pins_sha256_1		The hh_public_key_pins_sha256_1 option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_public_key_pins_sha256_2		The hh_public_key_pins_sha256_2 option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_public_key_pins_sub_domains		The hh_public_key_pins_sub_domains option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_referrer_policy		The hh_referrer_policy option doesn't have any known conflicts with other themes or plugins.
0
hh_referrer_policy_value		The hh_referrer_policy_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_report_to		The hh_report_to option doesn't have any known conflicts with other themes or plugins.
0
hh_report_to_value		The hh_report_to_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_strict_transport_security		The hh_strict_transport_security option doesn't have any known conflicts with other themes or plugins.
0
hh_strict_transport_security_max_age		The hh_strict_transport_security_max_age option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_strict_transport_security_preload		The hh_strict_transport_security_preload option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_strict_transport_security_sub_domains		The hh_strict_transport_security_sub_domains option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_strict_transport_security_value		The hh_strict_transport_security_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_timing_allow_origin		The hh_timing_allow_origin option doesn't have any known conflicts with other themes or plugins.
0
hh_timing_allow_origin_url		The hh_timing_allow_origin_url option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_timing_allow_origin_value		The hh_timing_allow_origin_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_user_ini_path		The hh_user_ini_path option doesn't have any known conflicts with other themes or plugins.
/mnt/ramdisk/working/empty-wp-5-9-34733/.user.ini
hh_vary		The hh_vary option doesn't have any known conflicts with other themes or plugins.
0
hh_vary_value		The hh_vary_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_www_authenticate		The hh_www_authenticate option doesn't have any known conflicts with other themes or plugins.
0
hh_www_authenticate_pswd		The hh_www_authenticate_pswd option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_www_authenticate_realm		The hh_www_authenticate_realm option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_www_authenticate_type		The hh_www_authenticate_type option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_www_authenticate_user		The hh_www_authenticate_user option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_content_type_options		The hh_x_content_type_options option doesn't have any known conflicts with other themes or plugins.
0
hh_x_content_type_options_value		The hh_x_content_type_options_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_dns_prefetch_control		The hh_x_dns_prefetch_control option doesn't have any known conflicts with other themes or plugins.
0
hh_x_dns_prefetch_control_value		The hh_x_dns_prefetch_control_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_download_options		The hh_x_download_options option doesn't have any known conflicts with other themes or plugins.
0
hh_x_download_options_value		The hh_x_download_options_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_frame_options		The hh_x_frame_options option doesn't have any known conflicts with other themes or plugins.
0
hh_x_frame_options_domain		The hh_x_frame_options_domain option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_frame_options_value		The hh_x_frame_options_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_permitted_cross_domain_policies		The hh_x_permitted_cross_domain_policies option doesn't have any known conflicts with other themes or plugins.
0
hh_x_permitted_cross_domain_policies_value		The hh_x_permitted_cross_domain_policies_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_powered_by		The hh_x_powered_by option doesn't have any known conflicts with other themes or plugins.
0
hh_x_powered_by_option		The hh_x_powered_by_option option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_powered_by_value		The hh_x_powered_by_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_robots_tag		The hh_x_robots_tag option doesn't have any known conflicts with other themes or plugins.
0
hh_x_robots_tag_value		The hh_x_robots_tag_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_ua_compatible		The hh_x_ua_compatible option doesn't have any known conflicts with other themes or plugins.
0
hh_x_ua_compatible_value		The hh_x_ua_compatible_value option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_xxs_protection		The hh_x_xxs_protection option doesn't have any known conflicts with other themes or plugins.
0
hh_x_xxs_protection_uri		The hh_x_xxs_protection_uri option doesn't have any known conflicts with other themes or plugins.
(empty string)
hh_x_xxs_protection_value		The hh_x_xxs_protection_value option doesn't have any known conflicts with other themes or plugins.
(empty string)

During use HTTP Headers 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 HTTP Headers there were 1 option still present in the wp-options table:

recently_activated

Contact HTTP Headers experts for help

What new PHP functions does HTTP Headers declare when it is active?

Installing HTTP Headers added 74 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
apache_auth_credentials	0 conflicts	Fatal error: Cannot redeclare apache_auth_credentials()
apache_auth_directives	0 conflicts	Fatal error: Cannot redeclare apache_auth_directives()
apache_check_requirements	0 conflicts	Fatal error: Cannot redeclare apache_check_requirements()
apache_content_encoding_directives	0 conflicts	Fatal error: Cannot redeclare apache_content_encoding_directives()
apache_content_type_directives	0 conflicts	Fatal error: Cannot redeclare apache_content_type_directives()
apache_cookie_security_directives	0 conflicts	Fatal error: Cannot redeclare apache_cookie_security_directives()
apache_expires_directives	0 conflicts	Fatal error: Cannot redeclare apache_expires_directives()
apache_headers_directives	0 conflicts	Fatal error: Cannot redeclare apache_headers_directives()
apache_timing_directives	0 conflicts	Fatal error: Cannot redeclare apache_timing_directives()
build_csp_value	0 conflicts	Fatal error: Cannot redeclare build_csp_value()
check_filename	0 conflicts	Fatal error: Cannot redeclare check_filename()
check_php_requirements	0 conflicts	Fatal error: Cannot redeclare check_php_requirements()
check_web_server_requirements	0 conflicts	Fatal error: Cannot redeclare check_web_server_requirements()
get_feature_policy_header	0 conflicts	Fatal error: Cannot redeclare get_feature_policy_header()
get_htaccess_filename	0 conflicts	Fatal error: Cannot redeclare get_htaccess_filename()
get_htdigest_filename	0 conflicts	Fatal error: Cannot redeclare get_htdigest_filename()
get_htpasswd_filename	0 conflicts	Fatal error: Cannot redeclare get_htpasswd_filename()
get_http_header	0 conflicts	Fatal error: Cannot redeclare get_http_header()
get_http_headers	0 conflicts	Fatal error: Cannot redeclare get_http_headers()
get_nel_header	0 conflicts	Fatal error: Cannot redeclare get_nel_header()
get_permissions_policy_header	0 conflicts	Fatal error: Cannot redeclare get_permissions_policy_header()
get_report_to_header	0 conflicts	Fatal error: Cannot redeclare get_report_to_header()
get_user_ini_filename	0 conflicts	Fatal error: Cannot redeclare get_user_ini_filename()
get_web_server_filename	0 conflicts	Fatal error: Cannot redeclare get_web_server_filename()
get_x_robots_tag_header	0 conflicts	Fatal error: Cannot redeclare get_x_robots_tag_header()
http_digest_parse	0 conflicts	Fatal error: Cannot redeclare http_digest_parse()
http_headers	0 conflicts	Fatal error: Cannot redeclare http_headers()
http_headers_activate	0 conflicts	Fatal error: Cannot redeclare http_headers_activate()
http_headers_admin	0 conflicts	Fatal error: Cannot redeclare http_headers_admin()
http_headers_admin_add_page	0 conflicts	Fatal error: Cannot redeclare http_headers_admin_add_page()
http_headers_admin_page	0 conflicts	Fatal error: Cannot redeclare http_headers_admin_page()
http_headers_after_setup_theme	0 conflicts	Fatal error: Cannot redeclare http_headers_after_setup_theme()
http_headers_ajax_inspect	0 conflicts	Fatal error: Cannot redeclare http_headers_ajax_inspect()
http_headers_deactivate	0 conflicts	Fatal error: Cannot redeclare http_headers_deactivate()
http_headers_enqueue	0 conflicts	Fatal error: Cannot redeclare http_headers_enqueue()
http_headers_logout	0 conflicts	Fatal error: Cannot redeclare http_headers_logout()
http_headers_option	0 conflicts	Fatal error: Cannot redeclare http_headers_option()
http_headers_post_export	0 conflicts	Fatal error: Cannot redeclare http_headers_post_export()
http_headers_post_import	0 conflicts	Fatal error: Cannot redeclare http_headers_post_import()
http_headers_settings_link	0 conflicts	Fatal error: Cannot redeclare http_headers_settings_link()
http_headers_text_domain	0 conflicts	Fatal error: Cannot redeclare http_headers_text_domain()
iis_auth_credentials	0 conflicts	Fatal error: Cannot redeclare iis_auth_credentials()
iis_auth_directives	0 conflicts	Fatal error: Cannot redeclare iis_auth_directives()
iis_check_requirements	0 conflicts	Fatal error: Cannot redeclare iis_check_requirements()
iis_content_encoding_directives	0 conflicts	Fatal error: Cannot redeclare iis_content_encoding_directives()
iis_content_type_directives	0 conflicts	Fatal error: Cannot redeclare iis_content_type_directives()
iis_cookie_security_directives	0 conflicts	Fatal error: Cannot redeclare iis_cookie_security_directives()
iis_expires_directives	0 conflicts	Fatal error: Cannot redeclare iis_expires_directives()
iis_headers_directives	0 conflicts	Fatal error: Cannot redeclare iis_headers_directives()
iis_timing_directives	0 conflicts	Fatal error: Cannot redeclare iis_timing_directives()
is_apache_mode	0 conflicts	Fatal error: Cannot redeclare is_apache_mode()
is_php_mode	0 conflicts	Fatal error: Cannot redeclare is_php_mode()
is_samesite_supported	0 conflicts	Fatal error: Cannot redeclare is_samesite_supported()
nginx_auth_credentials	0 conflicts	Fatal error: Cannot redeclare nginx_auth_credentials()
nginx_auth_directives	0 conflicts	Fatal error: Cannot redeclare nginx_auth_directives()
nginx_check_requirements	0 conflicts	Fatal error: Cannot redeclare nginx_check_requirements()
nginx_content_encoding_directives	0 conflicts	Fatal error: Cannot redeclare nginx_content_encoding_directives()
nginx_content_type_directives	0 conflicts	Fatal error: Cannot redeclare nginx_content_type_directives()
nginx_cookie_security_directives	0 conflicts	Fatal error: Cannot redeclare nginx_cookie_security_directives()
nginx_expires_directives	0 conflicts	Fatal error: Cannot redeclare nginx_expires_directives()
nginx_headers_directives	0 conflicts	Fatal error: Cannot redeclare nginx_headers_directives()
nginx_timing_directives	0 conflicts	Fatal error: Cannot redeclare nginx_timing_directives()
php_auth_digest	0 conflicts	Fatal error: Cannot redeclare php_auth_digest()
php_content_encoding	0 conflicts	Fatal error: Cannot redeclare php_content_encoding()
php_cookie_security_directives	0 conflicts	Fatal error: Cannot redeclare php_cookie_security_directives()
update_auth_credentials	0 conflicts	Fatal error: Cannot redeclare update_auth_credentials()
update_auth_directives	0 conflicts	Fatal error: Cannot redeclare update_auth_directives()
update_content_encoding_directives	0 conflicts	Fatal error: Cannot redeclare update_content_encoding_directives()
update_content_type_directives	0 conflicts	Fatal error: Cannot redeclare update_content_type_directives()
update_cookie_security_directives	0 conflicts	Fatal error: Cannot redeclare update_cookie_security_directives()
update_expires_directives	0 conflicts	Fatal error: Cannot redeclare update_expires_directives()
update_headers_directives	0 conflicts	Fatal error: Cannot redeclare update_headers_directives()
update_timing_directives	0 conflicts	Fatal error: Cannot redeclare update_timing_directives()
update_user_ini_filename	0 conflicts	Fatal error: Cannot redeclare update_user_ini_filename()

Using HTTP Headers 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 HTTP Headers from the command line with WP-CLI

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

wp plugin install http-headers

How to activate HTTP Headers from the command line with WP-CLI

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

wp plugin install http-headers --activate

How to reinstall HTTP Headers from the command line with WP-CLI

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

wp plugin install http-headers --force

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

wp plugin update http-headers

How to delete HTTP Headers from the command line with WP-CLI

wp plugin delete http-headers

Where can you download earlier versions of HTTP Headers?

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 HTTP Headers 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 HTTP Headers

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