If PHS is high up your list, call Admissions soonest and ask where DD is on the WL. Make it really clear to them that it's your first choice, and that you'll accept it if offered (if that's true, obviously!)
There will be some movement over the next couple of weeks as offers roll in - some will reject PHS quite quickly, others perhaps not until after offer holders' days, perhaps some not til national offers day for state schools on March 1st. It's definitely not all over if she's WLed. But I totally sympathise that it's a horrible conversation to have to have with a 10 or 11 year old.