Token::scan

public Token::scan($text)

public function scan($text) {
  // Matches tokens with the following pattern: [$type:$name]
  // $type and $name may not contain [ ] characters.
  // $type may not contain : or whitespace characters, but $name may.
  preg_match_all('/
      \[             # [ - pattern start
      ([^\s\[\]:]+)  # match $type not containing whitespace : [ or ]
      :              # : - separator
      ([^\[\]]+)     # match $name not containing [ or ]
      \]             # ] - pattern end
      /x', $text, $matches);

  $types = $matches[1];
  $tokens = $matches[2];

  // Iterate through the matches, building an associative array containing
  // $tokens grouped by $types, pointing to the version of the token found in
  // the source text. For example, $results['node']['title'] = '[node:title]';
  $results = array();
  for ($i = 0; $i < count($tokens); $i++) {
    $results[$types[$i]][$tokens[$i]] = $matches[0][$i];
  }

  return $results;
}