Storing them by date

Hello, I needed to show not stores but events on the map and organize them by most recent date first, so I made it easy for me and added the date info into the ‘fax’ field of the CVS and added the following code on functions.php:

// sort by date filter
add_filter( 'wpsl_store_data', 'custom_result_sort' );

function custom_result_sort( $store_meta ) {
    
    $custom_sort = array();
    
    foreach ( $store_meta as $key => $row ) {
        $custom_sort[$key] = $row['fax'];
    }

    array_multisort( $custom_sort, SORT_ASC, SORT_REGULAR, $store_meta );
    //You can reverse the sorting by changing SORT_ASC to SORT_DESC
    
    return $store_meta;
}

It works, but my problem now is that it’s being sorted by alphanumeric order, so ’01 Apr 20′ comes first and ’01 Feb 20′ comes second. So I uploaded the events again changing the date format from ’12 May 20′ to ‘2020-05-12′ (YYYY-MM-DD) on the CVS file, however I want to add a filter to show it back to ’01 Apr 20’, and I tried this code:

function reformatDate($date, $from_format = 'YYYY-MM-DD', $to_format = 'd F, Y') {
    $date_aux = date_create_from_format($from_format, $date);
    return date_format($date_aux,$to_format);
}

But it’s not working, I know this is way beyond the scope of the plugin but can you please lend me a hand if you know how to make this work?

Thank you very much

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