Using WordPress ‘default_feed’ PHP filter

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The default_feed WordPress PHP filter allows you to modify the default feed type for your website. Possible values include ‘rss2’ and ‘atom’.

Usage

add_filter('default_feed', 'my_custom_default_feed');

function my_custom_default_feed($feed_type) {
  // your custom code here
  return $feed_type;
}

Parameters

  • $feed_type (string): The type of default feed. Possible values include ‘rss2’ and ‘atom’. Default is ‘rss2’.

More information

See WordPress Developer Resources: default_feed

Examples

Change the default feed type to ‘atom’

To change the default feed type to ‘atom’:

add_filter('default_feed', 'change_default_feed_to_atom');

function change_default_feed_to_atom($feed_type) {
  $feed_type = 'atom';
  return $feed_type;
}

Set default feed type based on user role

To set the default feed type based on the user role:

add_filter('default_feed', 'set_default_feed_based_on_user_role');

function set_default_feed_based_on_user_role($feed_type) {
  if (current_user_can('administrator')) {
    $feed_type = 'atom';
  } else {
    $feed_type = 'rss2';
  }
  return $feed_type;
}

Modify default feed type using a custom function

To modify the default feed type using a custom function:

add_filter('default_feed', 'modify_default_feed_with_custom_function');

function modify_default_feed_with_custom_function($feed_type) {
  $feed_type = my_custom_function();
  return $feed_type;
}

function my_custom_function() {
  // your custom code here to determine the feed type
  return 'rss2';
}

Change default feed type based on query variables

To change the default feed type based on query variables:

add_filter('default_feed', 'change_default_feed_based_on_query_vars');

function change_default_feed_based_on_query_vars($feed_type) {
  global $wp_query;
  if (isset($wp_query->query_vars['custom_var'])) {
    $feed_type = 'atom';
  }
  return $feed_type;
}

Change default feed type using a plugin option

To change the default feed type using a plugin option:

add_filter('default_feed', 'change_default_feed_using_plugin_option');

function change_default_feed_using_plugin_option($feed_type) {
  $plugin_option = get_option('my_plugin_option');
  if ($plugin_option === 'atom') {
    $feed_type = 'atom';
  }
  return $feed_type;
}