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drupal_explode_tags

6 common.inc drupal_explode_tags($tags)
7 common.inc drupal_explode_tags($tags)

Explode a string of given tags into an array.

See also

drupal_implode_tags()

6 calls to drupal_explode_tags()

File

drupal/includes/common.inc, line 7072
Common functions that many Drupal modules will need to reference.

Code

function drupal_explode_tags($tags) {
  // This regexp allows the following types of user input:
  // this, "somecompany, llc", "and ""this"" w,o.rks", foo bar
  $regexp = '%(?:^|,\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",]*))%x';
  preg_match_all($regexp, $tags, $matches);
  $typed_tags = array_unique($matches[1]);

  $tags = array();
  foreach ($typed_tags as $tag) {
    // If a user has escaped a term (to demonstrate that it is a group,
    // or includes a comma or quote character), we remove the escape
    // formatting so to save the term into the database as the user intends.
    $tag = trim(str_replace('""', '"', preg_replace('/^"(.*)"$/', '\1', $tag)));
    if ($tag != "") {
      $tags[] = $tag;
    }
  }

  return $tags;
}