Locked out of phone

If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

If you have a backup that contains all of your data you can restore from that and get back everything except anything that was added prior the backup.

I assume you didn’t put an iCloud account on your phone when new? If you did it would be easy enough to prove whom you are and reset your password through Apple. But if you mean you forgot your password digits of numbers then you would need to hook up to your computer to iTunes to get phone from being disabled after entering wrong digits to many times. Another Apple product can walk you through such problem.

No, I addressed that. The only way to recover the photos would be to remember the passcode to the iPhone, when you attempt to connect to iTunes on a computer to sync it will ask for you to enter the passcode. To clear that passcode requires the iPhone to be put into Recovery mode as is described in the link I provided, this wipes all data from the iPhone.

There is no user file management provided in iOS so you cannot copy to a flash drive (is that what you meant by iPhone USB) and again you would have to enter the passcode to do so.

In the question there is not enough information to know what they mean by locked out?

Can you hook iPhone up to iTunes on computer and backup pictures to iTunes on your computer? Not enough information to give options other then what I’ve given.

Still the question of can he save his new photos? This would require hooking iPhone touch up to iTunes on computer to load pics to computer to save. Or load photos to iPhone USB.