The image has to be posted online at a photo sharing site like flixster or imger.
Then you need the direct URL of the photo and it needs to end in jpeg, jpg, ping or most any other photo file.
Then you post the link here, and then put the IMG code on it. [img]imageurl[/img]
For example,
This is an image i have posted at Imgur
https://i.imgur.com/ADYj3FV.jpgIf you click on it, you will see it.
If I put the IMG code on each end, it will look like this (i put an extra three periods after the jpg so it doesnt post and you can see it)
[img]https://i.imgur.com/ADYj3FV.jpg…[/img]
Without the three periods, it posts as this pic