Issue #3031775 by singhkiran, Chi: Cache backend classes reference non-existing functions cache_get() and cache_get_multiple()

core/lib/Drupal/Core/Cache/ApcuBackend.php

@@ -129,7 +129,7 @@ class ApcuBackend implements CacheBackendInterface {
    * Checks that the item is either permanent or did not expire.
    *
    * @param \stdClass $cache
-   *   An item loaded from cache_get() or cache_get_multiple().
+   *   An item loaded from self::get() or self::getMultiple().
    * @param bool $allow_invalid
    *   If TRUE, a cache item may be returned even if it is expired or has been
    *   invalidated. See ::get().

core/lib/Drupal/Core/Cache/DatabaseBackend.php

@@ -135,7 +135,7 @@ class DatabaseBackend implements CacheBackendInterface {
    * data as appropriate.
    *
    * @param object $cache
-   *   An item loaded from cache_get() or cache_get_multiple().
+   *   An item loaded from self::get() or self::getMultiple().
    * @param bool $allow_invalid
    *   If FALSE, the method returns FALSE if the cache item is not valid.
    *

core/lib/Drupal/Core/Cache/MemoryBackend.php

@@ -65,7 +65,7 @@ class MemoryBackend implements CacheBackendInterface, CacheTagsInvalidatorInterf
    * as appropriate.
    *
    * @param object $cache
-   *   An item loaded from cache_get() or cache_get_multiple().
+   *   An item loaded from self::get() or self::getMultiple().
    * @param bool $allow_invalid
    *   (optional) If TRUE, cache items may be returned even if they have expired
    *   or been invalidated.

core/lib/Drupal/Core/Cache/MemoryCache/MemoryCache.php

@@ -21,7 +21,7 @@ class MemoryCache extends MemoryBackend implements MemoryCacheInterface {
    * as appropriate.
    *
    * @param object $cache
-   *   An item loaded from cache_get() or cache_get_multiple().
+   *   An item loaded from self::get() or self::getMultiple().
    * @param bool $allow_invalid
    *   (optional) If TRUE, cache items may be returned even if they have expired
    *   or been invalidated. Defaults to FALSE.

core/lib/Drupal/Core/Cache/PhpBackend.php

@@ -112,7 +112,7 @@ class PhpBackend implements CacheBackendInterface {
    * as appropriate.
    *
    * @param object $cache
-   *   An item loaded from cache_get() or cache_get_multiple().
+   *   An item loaded from self::get() or self::getMultiple().
    * @param bool $allow_invalid
    *   If FALSE, the method returns FALSE if the cache item is not valid.
    *