Drupal - taxonomy term base block view

gistfile1.txt

<?php
  //code snippet for causing block to show based on a node's taxonomy term
  $make_block_visible = FALSE;
  $term_id_to_trigger_show_block = 19; // replace '19' your term id.

  if ((arg(0) == 'node') && is_numeric(arg(1))) {
    $values = array(
      ':nid' => arg(1),
      ':tid' => $term_id_to_trigger_show_block,
    );
    $result = db_query("SELECT nid FROM {taxonomy_index} WHERE nid=:nid AND tid=:tid", $values)->rowCount();
    
    if ($result)
       $make_block_visible = TRUE;
  }
  // The following code will cause block to show on the designated term's built-in "view" page such as:
  // example.com/taxonomy/term/19
  if ((arg(0) == 'taxonomy') && (arg(1) == 'term') && (arg(2) == $term_id_to_trigger_show_block)) {
    $make_block_visible = TRUE;
  }

  return $make_block_visible;
?>

<?php
  //code snippet for causing block to NOT-show based on a node's taxonomy term
  $make_block_visible = FALSE;
  $term_id_to_trigger_show_block = 19; // replace '19' your term id.

  if ((arg(0) == 'node') && is_numeric(arg(1))) {
    $values = array(
      ':nid' => arg(1),
      ':tid' => $term_id_to_trigger_show_block,
    );
    $result = db_query("SELECT nid FROM {taxonomy_index} WHERE nid=:nid AND tid=:tid", $values)->rowCount();
    
    if (!$result)
       $make_block_visible = TRUE;
  }
  // The following code will cause block to NOT-show on the designated term's built-in "view" page such as:
  // example.com/taxonomy/term/19 but in all the other cases
  if ((arg(0) == 'taxonomy') && (arg(1) == 'term') && (arg(2) != $term_id_to_trigger_show_block)) {
    $make_block_visible = TRUE;
  }

  return $make_block_visible;
?>