Phone Charger Woes! Not Working

My phone charger seems to be acting up lately. It's not charging my phone consistently, sometimes it works perfectly, other times it barely charges at all, and then there are times it doesn't register at all. I'm worried it might be broken, but could it also be an issue with the charging port on my phone? Is there a way to diagnose the problem before I rush out and buy a new charger? #phonecharger #tech #AskLemon8 #letschat