function _hashtags_parse_tags in Hashtags 8

Parse a string and return an array or comma-separated string of tags depending on the mode (second parameter)

Parameters

$text:

bool $is_string_return:

bool $capture_position:

Return value

array|string

2 calls to _hashtags_parse_tags()

hashtags_entity_presave in ./hashtags.module

Implements hook_entity_presave().

_hashtags_get_tids_by_text in ./hashtags.module

Get taxonomy term ids by text that contains hashtags

File

./hashtags.module, line 302

Code

function _hashtags_parse_tags($text, $is_string_return = TRUE, $capture_position = FALSE) {

  // capture_position == PREG_OFFSET_CAPTURE;
  // save position to avoid replacing hashtags
  // inside links (<a href="#ball">)
  $flag = $capture_position ? PREG_OFFSET_CAPTURE : PREG_PATTERN_ORDER;
  $tags_list = array();

  // 1) 2+ character after #
  // 2) Don't start with or use only numbers (0-9) (#123abc, #123 etc)
  // 3) Letters - digits work correct (#abc123, #conference2013)
  // 4) No Special Characters “!, $, %, ^, &, *, +, .”
  // 5) No Spaces
  // 6) May use an underscore. Hyphens and dashes will not work.
  // 7) <p>#hashtag</p> - is valid
  // 8) <a href="#hashtag">Link</p> - is not valid
  $pattern = "/[\\s>]+?#([[:alpha:]][[:alnum:]_]*[^<\\s[:punct:]])/iu";

  // add <htest> to process first #hastag - string beginning
  preg_match_all($pattern, '<htest>' . $text . '<htest>', $tags_list, $flag);

  // no hashtags has been found
  if (isset($tags_list[0]) && !sizeof($tags_list[0])) {
    if ($is_string_return) {
      return '';
    }
    return array();
  }

  // save position
  if ($capture_position) {
    foreach ($tags_list[1] as $key => $data) {
      $result[$data[1]] = strtolower($data[0]);
    }
  }
  else {

    // turn tags into lowercase
    foreach ($tags_list[1] as $key => $tag) {
      $tags_list[1][$key] = strtolower($tag);
    }
    if ($is_string_return) {
      $result = implode(',', $tags_list[1]);
    }
    else {
      $result = $tags_list[1];
    }
  }
  return array_unique($result);
}