socket_set_nonblock
    (PHP 4 >= 4.1.0, PHP 5)
socket_set_nonblock -- Sets nonblocking mode for file descriptor fd 
Description
bool 
socket_set_nonblock ( resource socket )
     The socket_set_nonblock() function sets the O_NONBLOCK flag 
     on the socket specified by the socket parameter.
    
     
Example 1. socket_set_nonblock() example 
<?php $port = 9090; if (!$socket = socket_create_listen($port)) {     echo socket_strerror(socket_last_error()); }
  if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) {     echo socket_strerror(socket_last_error()); }
  if (!socket_set_nonblock($socket)) {     echo socket_strerror(socket_last_error()); } ?>
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     Returns TRUE on success or FALSE on failure.
    
     See also socket_set_block() and 
     socket_set_option()