Remove Rules/Checks from Scans (edac_filter_register_rules)

Description

We have filters that allow you to remove a specific Accessibility Checker rule or all rules of a type. This filter will stop the plugin from scanning for that particular issue and remove it from all reports.

Please note that all of our errors and warnings are specifically created to ensure that your website meets Website Content Accessibility Guidelines (WCAG) 2.1. Removing a warning or error rule is not advised; however, if you have a specific use case that warrants removing a rule or group of rules, you can do so with the code snippets below.

Usage

This is how the filter is added:

add_filter('edac_filter_register_rules','my_rule_filter');

The edac_filter_register_rules filter allows you to define a different rule variable that removes rules individually or by type (error or warning) using the edac_remove_element_with_value() function.

The edac_remove_element_with_value() function accepts parameters for either a rule’s slug or type to remove that rule or all rules of the same type, such as:

edac_remove_element_with_value($rules, 'slug', 'slider_present');

Parameters

This table shows the slug and type for each rule in Accessibility Checker. These are the parameters that can be passed to the edac_remove_element_with_value() function.

Title	Slug	Type
Ambiguous Anchor Text	link_ambiguous_text	error
Blinking or Scrolling Content	text_blinking_scrolling	error
Broken ARIA Reference	broken_aria_reference	error
Broken Skip or Anchor Link	broken_skip_anchor_link	error
Duplicate Form Label	duplicate_form_label	error
Empty Button	empty_button	error
Empty Form Label	empty_form_label	error
Empty Heading Tag	empty_heading_tag	error
Empty Link	empty_link	error
Empty Table Header	empty_table_header	error
Image Map Missing Alternative Text	image_map_missing_alt_text	error
Image Missing Alternative Text	img_alt_missing	error
Incorrect Heading Order	incorrect_heading_order	error
Insufficient Color Contrast	color_contrast_failure	error
Linked Image Empty Alternative Text	img_linked_alt_empty	error
Linked Image Missing Alternative Text	img_linked_alt_missing	error
Long Description Invalid	long_description_invalid	error
Missing Form Label	missing_form_label	error
Missing Language Declaration	missing_lang_attr	error
Missing Table Header	missing_table_header	error
Missing Title	missing_title	error
Missing Transcript	missing_transcript	error
iFrame Missing Title	iframe_missing_title	error
A Slider is Present	slider_present	warning
A Video is Present	video_present	warning
ARIA hidden	aria_hidden	warning
Duplicate Alternative Text	img_alt_redundant	warning
Empty Paragraph Tag	paragraph_should_not_be_empty	warning
Image Animated GIF	img_animated_gif	warning
Image Empty Alternative Text	img_alt_empty	warning
Image Long Alternative Text	img_alt_long	warning
Link Opens New Window or Tab	link_blank	warning
Link to MS Office File	link_ms_office_file	warning
Link to Non-HTML File	link_non_html_file	warning
Link to PDF	link_pdf	warning
Low-quality Alternative Text	img_alt_invalid	warning
Missing Subheadings	missing_headings	warning
Possible Heading	possible_heading	warning
Tab Order Modified	tab_order_modified	warning
Text Justified	text_justified	warning
Text Too Small	text_small	warning
Underlined Text	underlined_text	warning

Examples

Remove a single rule

Here is how to remove a specific rule, using the rule slug for the specific rule being removed. This example shows us removing the “Slider is Present” warning:

Remove all rules by type

Here is an example of how to remove all warning rules:

Since

This filter was added in Accessibility Checker 1.4.0.

Source Code

This filter is located in edac_register_rules() in /accessibility-checker.php