dba_exists
(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.
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
