Using Anspress with Rank Math Pro (Schema.org)

Hi, I’ve tried to use the site to ask a question, but the registration’s process don’t work. I’m using currently Rank Math Pro and I want to use the “question” of Schema.org. And the built-in schema of Anspress don’t work anymore (a update to use Json will be welcome).

And Rank Math Pro answered me that Anspress is not compatible with their pluging, but I can add variables from Andpress with some codes. I want to know how to implement that. Below is the answer :

Anspress isn’t compatible with Rank Math so this may require coding it in PHP. Specifically, you need to retrieve the data from the Q&A item of Anspress (you may contact the support team from Anspress for this) and assign it to a custom Rank Math variable. Here’s a sample code to create a custom variable with Rank Math:

add_action( 'rank_math/vars/register_extra_replacements', function(){
	rank_math_register_var_replacement(
	   'shortcode_var_name', [
	   'name'        => esc_html__( 'Author name', 'rank-math' ),
	   'description' => esc_html__( 'Author description', 'rank-math' ),
	   'variable'    => 'shortcode_var_name', /* the actual variable: %shortcode_var_name% */
	   'example'     => shortcode_var_name_call_back(),
	   ],
	   'shortcode_var_name_call_back'
   );
});
function shortcode_var_name_call_back(){
	return "field value here...";
}
You can then insert the variable %shortcode_var_name% to the schema structure.

If Anspress is using a standard custom field, you can make use of this variable instead: https://rankmath.com/kb/variables-in-seo-title-description/#num-39-custom-field-advanced