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
- dba_delete() - Delete DBA entry specified by key
- dba_fetch() - Fetch data specified by key
- dba_insert() - Insert entry
- dba_replace() - Replace or insert entry