Versions of PHP below 4.3 will use socket_set_blocking() but will not understand stream_set_blocking().
(PHP 4, PHP 5, PHP 7, PHP 8)
socket_set_blocking — Псевдоним stream_set_blocking()
Функция — псевдоним функции: stream_set_blocking().
Versions of PHP below 4.3 will use socket_set_blocking() but will not understand stream_set_blocking().