q-eud-export-args.php

// EUD - export args ##
\add_filter( 'q/eud/export/args', [ get_class(), 'export_args' ], 10, 1 );

/**
* Filter export args in EUD plugin
*
* @since 2.0.0
*/
public static function export_args( $args = null ) 
{

	if ( is_null( $args ) ) {

		return $args;

	}

	// in our export "program" is the ID of post in a custom post_type
	// Check if a specific program was requested ##
	if ( 
		$_POST
		&& isset( $_POST['program'] ) 
		&& $_POST['program'] != '' 
	) {

		$args['meta_key'] = 'q_program_id';
		$args['meta_value'] = (int)$_POST['program'];
		$args['meta_compare'] = '=';

	}

	// kick it back ##
	return $args;

}