Stream Functions
PHP Manual


(PHP 4 >= 4.3.0, PHP 5, PHP 7)

stream_set_blockingSet blocking/non-blocking mode on a stream


bool stream_set_blocking ( resource $stream , bool $mode )

Sets blocking or non-blocking mode on a stream.

This function works for any stream that supports non-blocking mode (currently, regular files and socket streams).



The stream.


If mode is FALSE, the given stream will be switched to non-blocking mode, and if TRUE, it 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.

Return Values

Returns TRUE on success or FALSE on failure.



This function was previously called as set_socket_blocking() and later socket_set_blocking() but this usage is deprecated.

See Also

Stream Functions
PHP Manual