May phone not charging

@sadnahda you are really not giving us a lot of info here! You need to consider to letting us know if anything happened to your phone or if it just stop charging. It is always helpful if you at least tell us what you have tried and what you have checked.

Well, let's start at the beginning :-)

First, you want to check your charger. Make sure it has the proper voltages. Check to make sure connectors are not bend etc. After that, check the charging port. Clean it of any debris etc, use a few puffs of air to clean it out. Make sure there is no corrosion, debris etc. that prevents it from working. If none of this works, get an ammeter and see if your phone draws any amperage from the charger.

You may also have to consider replacing the battery. A depleted battery can no longer be charged. Measure the voltage on your battery connector with the charger plugged in. You should get around 4.2V If you do not get this voltage If you don't get that voltage check your flex cable coming from the charging board. Make sure it is seated properly and does not have any tears or other damage on it. Your phone has a separate charging board that could be faulty. Consider replacing that.

To work on your phone use something like this video since iFixit does not yet have a guide for that,