Custom yearly source index

Requirements

• Require WordPress 4.7+ / Tested up to 5.6.1
• Require PHP 5.6
• FacetWP 3.7.2+

Installation

First activate FacetWP. Then activate FacetWP - Yearly to create your yearly facet.

Create a Facet, for example a Select Facet, and choose "Yearly archive" as Data source.

Tips

By default, years are sorted by chronological order. If you want to reverse this order, you can use this snippet :

add_filter( 'facetwp_facet_orderby', 'sort_yearly_desc', 10, 2 );

function sort_yearly_desc( $orderby, $facet ) {
    if ( 'YOUR_FACET_NAME' === $facet['name'] ) {
        $orderby = 'f.facet_display_value DESC';
    }
    return $orderby;
}