How easy is it for an Apple phone to explode when plugged in and charging?

I've used 4 iPhones since I started using them, and each one basically charged while I played games. The possibility you mentioned basically doesn't exist. Apple's original chargers are basically unlikely to explode, because they are very stable in terms of output voltage and output current. The battery quality of the iPhone is very good. Although the capacity is not large, the safety factor is very high. Because many homes in North America are primarily made of wooden structures. This is why American appliance companies attach great importance to the safety of household appliances. Basically, there will be no such hidden dangers. However, using it while charging will definitely reduce battery life.