gistfile1.php

<?php

function zarza_custom_clear_cache(){
  $ch = curl_init("https://192.198.89.58");
  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PURGE');
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
  $output = curl_exec($ch);

  $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);

  curl_close($ch);

}
add_action( 'after_rocket_clean_file', zarza_custom_clear_cache ); 
add_action( 'after_rocket_clean_domain', zarza_custom_clear_cache );