dba_exists

(PHP 4, PHP 5, PHP 7)

dba_exists — Check whether key exists

说明

dba_exists ( string $key , resource $handle ) : bool

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

参数

key

The key the check is performed for.

handle

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

返回值

Returns TRUE if the key exists, FALSE otherwise.

参见