I have a plant in my garden which from searching pictures on the web looks
to be what might
be a phormium(?).

It has large pointed thick leaves coming out of the ground it appears to
grow outwards ie growing from the middle.
The leaves are now 8 feet tall and the leaves are splitting and have flopped
over.

It never flowers, it only has these leaves, which is contrary to what i
have
read about Phormiums so i am assuming there are some types that don't flower

It looks a little like this pictu

http://www.aujardin.info/img/img5/phormium.jpg


My question is does anyone know if i can safely cut each leaf down to about
4 foot high?

TIA