Drupal 7 Panels Visibility Rule: Body Content Counts More 1000 Chars

eval_code.php

<?php
// Insert in input box without <?php  tags
if(isset($contexts['argument_entity_id:node_1']->data->body['und'][0]['value'])){
  if(strlen(strip_tags($contexts['argument_entity_id:node_1']->data->body['und'][0]['value'])) > 1000 ) {
    return TRUE;
  }
  else {
    return FALSE;
  }
}
else {
  return FALSE;
}