Is there any warranty on iPhone charger?

Hello,

Check the charging port for lint or other debris and see this:

If your iPhone, iPad, or iPod touch won‘t charge

Also see:

Identify counterfeit or uncertified Lightning connector accessories

Good luck.

P.S. accessories generally have a one year warranty: Apple One (1) Year Limited Warranty

Good luck.

Warranty is not something the manufacturer choose to provide its the laws of your country

https://en.wikipedia.org/wiki/Warranty