dba_exists
(PHP 3 >= 3.0.8, PHP 4, PHP 5)
dba_exists -- Check whether key exists
说明
bool
dba_exists
( string key, resource handle )
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.