dba_exists

(PHP 4, PHP 5, PHP 7, PHP 8)

dba_existsCheck whether key exists

说明

dba_exists(string|array $key, Dba\Connection $dba): bool

dba_exists() checks whether the specified key exists in the database.

参数

key

The key the check is performed for.

dba

A Dba\Connection instance, returned by dba_open() or dba_popen().

返回值

Returns true if the key exists, false otherwise.

更新日志

版本 说明
8.4.0 The dba parameter expects a Dba\Connection instance now; previously, a valid dba resource was expected.

参见