filter_wppfm_feed_ids_in_queue.php

<?php

// wppfm feed ides in queue Filter
//
function only_last_week_ids( $ids ) {
  $index = 0; // set the index
  
  foreach( $ids as $id ) {
    
    $post_date = get_the_date( 'U', $id ); // get the posts published date
    $last_week_date = strtotime( '-1 week' ); // get the date of one week ago
    
    if( $post_date < $last_week_date ) { 
      // Remove the id from the queue when the product is older than one week
      unset( $ids[ $index ] ); 
    }
    
    $index++;
  }
  // IMPORTANT! Always return the $ids
  return $ids;
}
add_filter( 'wppfm_feed_ids_in_queue', 'only_last_week_ids' );