function _views_data_export_xml_tag_clean in Views data export 7

Same name and namespace in other branches

1. 6.3 theme/views_data_export.theme.inc \_views_data_export_xml_tag_clean()
2. 6 theme/views_data_export.theme.inc \_views_data_export_xml_tag_clean()
3. 6.2 theme/views_data_export.theme.inc \_views_data_export_xml_tag_clean()
4. 7.4 theme/views_data_export.theme.inc \_views_data_export_xml_tag_clean()
5. 7.3 theme/views_data_export.theme.inc \_views_data_export_xml_tag_clean()

Returns a valid XML tag formed from the given input.

Parameters

$tag The string that should be made into a valid XML tag.:

Return value

The valid XML tag or an empty string if the string contained no valid XML tag characters.

3 calls to _views_data_export_xml_tag_clean()

template_preprocess_views_data_export_xml_body in theme/views_data_export.theme.inc

Preprocess xml output template.

template_preprocess_views_data_export_xml_footer in theme/views_data_export.theme.inc

Preprocess xml output template.

template_preprocess_views_data_export_xml_header in theme/views_data_export.theme.inc

Preprocess xml output template.

File

theme/views_data_export.theme.inc, line 365

Theme related functions for processing our output style plugins.

Code

function _views_data_export_xml_tag_clean($tag) {

  // This regex matches characters that are not valid in XML tags, and the
  // unicode ones that are. We don't bother with unicode, because it would so
  // the preg_replace down a lot.
  static $invalid_tag_chars_regex = '#[^\\:A-Za-z_\\-.0-9]+#';

  // These characters are not valid at the start of an XML tag:
  static $invalid_start_chars = '-.0123456789';

  // Convert invalid chars to '-':
  $tag = preg_replace($invalid_tag_chars_regex, '-', $tag);

  // Need to trim invalid characters from the start of the string:
  $tag = ltrim($tag, $invalid_start_chars);
  return $tag;
}