I phone won’t charge

See if this link helps...

If your iPhone or iPod touch won't charge - Apple Support

As it is an older phone, it may be that the battery is failing. Check this link to find a store where you can have the battery replaced if needed...

Apple Store - Find a Store - Apple

Click on the link and read what to do "If your iPhone, iPad, or iPod touch won't charge" --> If your iPhone or iPod touch won't charge - Apple Support