(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
stream_set_blocking — Set blocking/non-blocking mode on a stream
Sets blocking or non-blocking mode on a
This function works for any stream that supports non-blocking mode (currently, regular files and socket streams).
false, the given stream
will be switched to non-blocking mode, and if
will be switched to blocking mode. This affects calls like
fgets() and fread()
that read from the stream. In non-blocking mode an
fgets() call will always return right away
while in blocking mode it will wait for data to become available
on the stream.
true on success or
false on failure.
On Windows, this has no affect on local files. Non-blocking IO for local files is not supported on Windows.