Provide replacement values for placeholder tokens.
This hook is invoked when someone calls token_replace(). That function first scans the text for [type:token] patterns, and splits the needed tokens into groups by type. Then hook_tokens() is invoked on each token-type group, allowing your module to respond by providing replacement text for any of the tokens in the group that your module knows how to process.
A module implementing this hook should also implement hook_token_info() in order to list its available tokens on editing screens.
$type: The machine-readable name of the type (group) of token being replaced, such as 'node', 'user', or another type defined by a hook_token_info() implementation.
$tokens: An array of tokens to be replaced. The keys are the machine-readable token names, and the values are the raw [type:token] strings that appeared in the original text.
$data: (optional) An associative array of data objects to be used when generating replacement values, as supplied in the $data parameter to token_replace().
$options: (optional) An associative array of options for token replacement; see token_replace() for possible values.
An associative array of replacement values, keyed by the raw [type:token] strings from the original text.
Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.
function hook_tokens($type, $tokens, array $data = array(), array $options = array()) {
$url_options = array(
'absolute' => TRUE,
);
if (isset($options['language'])) {
$url_options['language'] = $options['language'];
$language_code = $options['language']->language;
}
else {
$language_code = NULL;
}
$sanitize = !empty($options['sanitize']);
$replacements = array();
if ($type == 'node' && !empty($data['node'])) {
$node = $data['node'];
foreach ($tokens as $name => $original) {
switch ($name) {
// Simple key values on the node.
case 'nid':
$replacements[$original] = $node->nid;
break;
case 'title':
$replacements[$original] = $sanitize ? check_plain($node->title) : $node->title;
break;
case 'edit-url':
$replacements[$original] = url('node/' . $node->nid . '/edit', $url_options);
break;
// Default values for the chained tokens handled below.
case 'author':
$name = $node->uid == 0 ? variable_get('anonymous', t('Anonymous')) : $node->name;
$replacements[$original] = $sanitize ? filter_xss($name) : $name;
break;
case 'created':
$replacements[$original] = format_date($node->created, 'medium', '', NULL, $language_code);
break;
}
}
if ($author_tokens = token_find_with_prefix($tokens, 'author')) {
$author = user_load($node->uid);
$replacements += token_generate('user', $author_tokens, array(
'user' => $author,
), $options);
}
if ($created_tokens = token_find_with_prefix($tokens, 'created')) {
$replacements += token_generate('date', $created_tokens, array(
'date' => $node->created,
), $options);
}
}
return $replacements;
}