socket_set_block
    (PHP 4 >= 4.2.0, PHP 5)
socket_set_block -- 
     Sets blocking mode on a socket resource
    
Description
bool 
socket_set_block ( resource socket )
     The socket_set_block() function removes the O_NONBLOCK flag 
     on the socket specified by the socket parameter.
    
     
Example 1. socket_set_block() 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)) { // $socket is now nonblocking     echo socket_strerror(socket_last_error()); }
  if (!socket_set_block($socket)) {     // $socket is now blocking     echo socket_strerror(socket_last_error()); }
  ?>
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     Returns TRUE on success or FALSE on failure.
    
     See also socket_set_nonblock() and 
     socket_set_option()