dba_exists

Check whether key exists (PHP 3 >= 3.0.8, PHP 4, PHP 5)
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.