Returns whether a given key exists in the store.

Parameters

string $key: The key to check.

Return value

bool TRUE if the key exists, FALSE otherwise.

Overrides KeyValueStoreInterface::has

1 method overrides DatabaseStorage::has()

DatabaseStorageExpirable::has in core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php

Returns whether a given key exists in the store.

File

core/lib/Drupal/Core/KeyValueStore/DatabaseStorage.php, line 64

Class

DatabaseStorage

Defines a default key/value store implementation.

Namespace

Drupal\Core\KeyValueStore

Code

public function has($key) {
  try {
    return (bool) $this->connection
      ->query('SELECT 1 FROM {' . $this->connection
      ->escapeTable($this->table) . '} WHERE [collection] = :collection AND [name] = :key', [
      ':collection' => $this->collection,
      ':key' => $key,
    ])
      ->fetchField();
  } catch (\Exception $e) {
    $this->catchException($e);
    return FALSE;
  }
}

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