function token_scan

Builds a list of all token-like patterns that appear in the text.

Parameters

string $text: The text to be scanned for possible tokens.

Return value

array: An associative array of discovered tokens, grouped by type.

File

includes/token.inc, line 113

Backdrop placeholder/token replacement system.

Code

function token_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;
}