OK, found another small project from old blog. I’ve created small PHP script to check whether a SOCKS5 proxy server is alive or not.
Full source code here (can’t write in this post because the source code is mixed with HTML codes): http://demo.ahowto.net/socks5check.phps
Fully working demo URL: http://demo.ahowto.net/socks5check.php
Where to get SOCKS5 proxy list for FREE?
Remember that the script is only working for SOCKS version 5, not 4