# \[How To\]Check Invisible really

**URL:** https://forum.kirupa.com/t/how-to-check-invisible-really/244850
**Category:** programming
**Created:** [November 22, 2007, 1:31pm UTC](https://forum.kirupa.com/t/how-to-check-invisible-really/244850 "2007-11-22T13:31:26Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![vietskynet](https://avatars.discourse-cdn.com/v4/letter/v/e19b73/32.png) [@vietskynet](https://forum.kirupa.com/u/vietskynet)
#### Post date: [November 22, 2007, 1:31pm UTC](https://forum.kirupa.com/t/how-to-check-invisible-really/244850/1 "2007-11-22T13:31:26Z")

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I see some websites can check invisible status yahoo.  
Sometimes i make some code to filter content on those sites to find yahoo status  
But i want to know how those sites can do that  
Ex : website [http://www.vngrabber.com/](http://www.vngrabber.com/)

Can we use socket, or secret link to yahoo like "[http://opi.yahoo.com/online?u=[username]&m=g&t=2](http://opi.yahoo.com/online?u=%5Busername%5D&m=g&t=2) or … to do that

Thx,:?)