Will using a knockoff iphone charging wall adapter ruin my iphone?

I know that knockoff iphone chargers are bad for your iphone, but will a knock off wall adapter have any effect or harm the iphone?

"knockoff iphone chargers are bad for your iphone" only if they are made improperly or the USB-Lighting cable is somehow had.

For example, for my iPhone 6s and now iPhone 8, I used a Belkin USB-Lighting cable to connect the phones to a USB outlet on my Targus AC adapter used for my HP laptop. This AC Adapter has a USB port.

I also plug my iPhones into the HP laptop's USB port and the iPhones recharge just fine. And I have plugged my iPhones into a 7-port "Kingwin" USB "splitter" that's been plugged into my iMacs or HP laptop… And no problem. And I recently replaced the AC wall outlet in the kitchen with a new otlet that has two USB charging ports… And it works great - no external power adapter needed. When camping, I carry a TalentCell powerbank and recharge the iPhones with it…

And… I keep a "Symtek" wall charger adapter and appropriate cable in my computer case… And I have successfully used it to recharge lots of iPhones (including the current 8, previous 7, 6s and 4s and various iPads and coworker's idevices).