This filter is applied within the bcn_admin class in the admin_page() function. This filter is intended to allow users to override the default behavior of Breadcrumb NavXT to hide settings for non-public taxonomies. This filter was introduced in version 4.3. In version 6.0, a third parameter was added. It receives three parameters:

• $public – (boolean)(required) Whether or not the taxonomy is a publicly visible taxonomy as represented by the public property of the taxonomy object
• $taxonomy_name – (string)(optional) The name of the taxonomy
• $posttype_name – (string)(optional) The name of the post type that the taxonomy is available for, may be NULL if a post type is not available

This filter is applied within the bcn_breadcrumb class in the assemble() function. This filter was introduced in version 4.4. It receives three parameters:

• $replacements – (array)(required) The array of template tags and replacements. This array contains key value pairs, where a key is the template tag, and the corresponding value is the value to replace the tag with
• $type – (array)(optional) The array of type strings for the breadcrumb
• $id – (int|NULL)(optional) The ID of the resource represented by the breadcrumb, will be NULL if no suitable ID exists

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• How to Add a Custom Breadcrumb Template Tag

This filter is applied within the bcn_admin (by means of the mtekk_adminkit::wp_loaded()) and the bcn_breadcrumb class in the class constructor. Note that Breadcrumb NavXT itself registers a filter for this filter to load in extended attributes for select tags, it is advised that end users use a priority with value greater than 1 to prevent unexpected results. This filter was introduced in version 4.4. It receives one parameter:

• $allowed_html – (array)(required) The array result of acceptable HTML tags and attributes. See the WordPress codex for wp_kses() for an example of this array structure

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• How to Add li and Other Tags to Breadcrumb Templates

This filter is applied within the bcn_breadcrumb class in the assemble() function. This filter was introduced in version 5.0. It receives two parameters:

• $type – (array)(required) The array of type strings for the breadcrumb
• $id – (int|NULL)(optional) The ID of the resource represented by the breadcrumb, will be NULL if no suitable ID exists

This filter is applied within the bcn_breadcrumb class in the set_template member function before passing into wp_kses() and then setting the internal $template property. This filter was introduced in 4.4. It receives three parameters:

• $template – (string)(required) The template that is being set for the breadcrumb
• $type – (array)(optional) The array of type strings for the breadcrumb
• $id – (int|NULL)(optional) The ID of the resource represented by the breadcrumb, will be NULL if no suitable ID exists