So I broke my phone screen...

[Schnitzel]

On the way home from school today,
I dropped my phone...and the glass broke...

Currently looks like this:
Attachment 132253

Is it still safe to use? (i.e. no stuff will fall out of it)

Should I save up to buy a new phone, or repair it?
(Its a laggy, old phone)

I talked to a few friends, some say its ok to keep using it, others say i should replace it.

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Anyone else ever cracked their phone's screen before?
What did you do?

Thanks
-Ruizhe