dba_exists

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

dba_exists — Check whether key exists

说明

dba_exists ( string|array $key , resource $dba ) : bool

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

参数

key

The key the check is performed for.

dba

The database handler, returned by dba_open() or dba_popen().

返回值

Returns true if the key exists, false otherwise.

参见