Solar_Struct::__isset()
public
void
Solar_Struct::__isset
( string $key
)
Does a certain key exist in the data?
Parameters
(string)
$key: The requested data key.
Returns
(void)
Description
Does a certain key exist in the data?
Note that this is slightly different from normal PHP isset(); it will say the key is set, even if the key value is null or otherwise empty.