Imap not working in cron, working in browser

[Shrapnel_N5]

extension must be loaded in php.ini
run script with phpinfo(), note php.ini location from it
and then edit

[mmarif4u]

Thanks Shrapnel_N5,
Before reading your post here, what i did were:
I open php.ini on the server and search for "extension=imap.so"
which was there and not commented, so it mean it was enabled. Then i open conf.d directory and look for imap.ini which was not there.
So what i did:

extension = imap.so

And save the above line as a file named imap.ini and upload it to /etc/php5/conf.d directory and restart the server.
And the great thing is, it works.

Thanks again.
Hope, it will be helpful for some one in future.