function _views_data_export_xml_tag_clean in Views data export 7.4

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 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.

4 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.

XMLExportViewsDataExportTests::testCustomiseXMLNodes in tests/xml_export.test

Test to ensure that XML nodes names can be manually specified.

File

theme/views_data_export.theme.inc, line 447

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);

  // As a last line of defense, if we've stripped out everything, set it to
  // something.
  if (empty($tag)) {
    $tag = 'invalid-tag-name';
  }
  return $tag;
}