public static function Cache::mergeTags in Zircon Profile 8
Same name and namespace in other branches
- 8.0 core/lib/Drupal/Core/Cache/Cache.php \Drupal\Core\Cache\Cache::mergeTags()
Merges arrays of cache tags and removes duplicates.
The cache tags array is returned in a format that is valid for \Drupal\Core\Cache\CacheBackendInterface::set().
When caching elements, it is necessary to collect all cache tags into a single array, from both the element itself and all child elements. This allows items to be invalidated based on all tags attached to the content they're constituted from.
Parameters
array $a: Cache tags array to merge.
array $b: Cache tags array to merge.
Return value
string[] The merged array of cache tags.
47 calls to Cache::mergeTags()
- AggregatorFeedBlock::getCacheTags in core/
modules/ aggregator/ src/ Plugin/ Block/ AggregatorFeedBlock.php - ArgumentPluginBase::getCacheTags in core/
modules/ views/ src/ Plugin/ views/ argument/ ArgumentPluginBase.php - The cache tags associated with this object.
- AssertPageCacheContextsAndTagsTrait::assertCacheTags in core/
modules/ system/ src/ Tests/ Cache/ AssertPageCacheContextsAndTagsTrait.php - Ensures that some cache tags are present in the current response.
- BlockContentCacheTagsTest::testBlock in core/
modules/ block_content/ src/ Tests/ BlockContentCacheTagsTest.php - Tests that the block is cached with the correct contexts and tags.
- BlockViewBuilder::viewMultiple in core/
modules/ block/ src/ BlockViewBuilder.php - Builds the render array for the provided entities.
File
- core/
lib/ Drupal/ Core/ Cache/ Cache.php, line 61 - Contains \Drupal\Core\Cache\Cache.
Class
- Cache
- Helper methods for cache.
Namespace
Drupal\Core\CacheCode
public static function mergeTags(array $a = [], array $b = []) {
assert('\\Drupal\\Component\\Assertion\\Inspector::assertAllStrings($a) && \\Drupal\\Component\\Assertion\\Inspector::assertAllStrings($b)', 'Cache tags must be valid strings');
$cache_tags = array_unique(array_merge($a, $b));
sort($cache_tags);
return $cache_tags;
}