How to remove a broken phillips screw?

A Phillips screw has been completely smashed, and the middle cross groove has become a hole. And the screw cap exposed to the outside of the screw is very thin, almost pinch-off with the pliers, and the screw space is also narrow. How to remove a broken phillips screw? Here are some ways to introduce：

Only if necessary, if the screw is rusted or stuck with glue, apply penetrating oil or heat.

Method 1: hammer and screwdriver

Method 2: hammer and chisel

Method 3: hammer and pointer

Method 4: welding a nut

Method 5: with a special extractor

Method 6: drilling a partially

Method 7: make new thread and put a reducer

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