Why do iPhone chargers stop working?

The original charger I got when I bought my iPhone ripped. I bought another iPhone charger and after a month or so, it stopped working all of a sudden. I disconnected it from my phone, and connected it again and it didn't work. I bought another iPhone charger and it happened the same thing as the second one. It stopped working all of a sudden. Does someone know why?

If you buy these chargers off Apple there shouldn't be a problem if your buying them third party there could be a problem

It could be the way they're positioned when you plug your iPhone in. I used to plug in my charger behind my bed, and it ripped the wires inside. And I can never seem to get out of the habit of somehow ruining my charger. It happens to me all the time. Just get a new charger and make sure it is one from Apple specifically.

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