On Windows, you can use this ioctl call to make the socket non blocking: 
ioctl($socket, 0x8004667e, $nonblocking);

[download]

update: $nonblocking = 1 => makes the socket non blocking, $nonblocking = 0 => makes the socket blocking.

In reply to Re: Non-blocking socket read on Windows by salva
in thread Non-blocking socket read on Windows by spurperl

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