function rdf_get_namespaces in Drupal 8
Same name and namespace in other branches
- 7 modules/rdf/rdf.module \rdf_get_namespaces()
- 9 core/modules/rdf/rdf.module \rdf_get_namespaces()
Retrieves RDF namespaces.
Invokes hook_rdf_namespaces() and collects RDF namespaces from modules that implement it.
Related topics
4 calls to rdf_get_namespaces()
- GetRdfNamespacesTest::testGetRdfNamespaces in core/
modules/ rdf/ tests/ src/ Functional/ GetRdfNamespacesTest.php - Tests getting RDF namespaces.
- rdf_preprocess_html in core/
modules/ rdf/ rdf.module - Implements hook_preprocess_HOOK() for HTML document templates.
- Rss::render in core/
modules/ node/ src/ Plugin/ views/ row/ Rss.php - Render a row object. This usually passes through to a theme template of some form, but not always.
- RssFields::render in core/
modules/ views/ src/ Plugin/ views/ row/ RssFields.php - Render a row object. This usually passes through to a theme template of some form, but not always.
2 string references to 'rdf_get_namespaces'
- Rss::render in core/
modules/ node/ src/ Plugin/ views/ row/ Rss.php - Render a row object. This usually passes through to a theme template of some form, but not always.
- RssFields::render in core/
modules/ views/ src/ Plugin/ views/ row/ RssFields.php - Render a row object. This usually passes through to a theme template of some form, but not always.
File
- core/
modules/ rdf/ rdf.module, line 112 - Enables semantically enriched output for Drupal sites in the form of RDFa.
Code
function rdf_get_namespaces() {
$namespaces = [];
// In order to resolve duplicate namespaces by using the earliest defined
// namespace, do not use \Drupal::moduleHandler()->invokeAll().
foreach (\Drupal::moduleHandler()
->getImplementations('rdf_namespaces') as $module) {
$function = $module . '_rdf_namespaces';
foreach ($function() as $prefix => $namespace) {
if (array_key_exists($prefix, $namespaces) && $namespace !== $namespaces[$prefix]) {
throw new Exception("Tried to map '{$prefix}' to '{$namespace}', but '{$prefix}' is already mapped to '{$namespaces[$prefix]}'.");
}
else {
$namespaces[$prefix] = $namespace;
}
}
}
return $namespaces;
}