@lonezahoor but bro still i believe you got the wrong code.
first upload a image... and you would get all the codes... in that list of codes click on Copy to Clipboard next to Hotlink for Forums (1) and paste here....
it would be like this
PHP:
[url=http://postimage.org/].[/url]
[url=http://postimage.org/]picture hosting[/url]
or else copy the Direct link and insert here
.