is there parking around the theater

Yes

Yes street parking, garage parking & when you purchase your ticket some time parking is often lower price Park Whiz, for example.

There are multiple parking garages near the Warner Theater. There is one just across the street.

We parked around the corner in a parking garage. $22

There is plenty of parking. I used an app called Park Whiz. Can get you reduced rates.

Street parking and a parking garage