set_socket_blocking(3) php man page | unix.com

SET_SOCKET_BLOCKING(3)							 1						    SET_SOCKET_BLOCKING(3)

set_socket_blocking - Alias ofstream_set_blocking(3)

	This function is an alias of: stream_set_blocking(3)

       Warning

	      This alias has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 7.0.0.

PHP Documentation Group 												    SET_SOCKET_BLOCKING(3)