$numReady = socket_select( $readSockets, $writeSockets, $exceptSockets, $timeout );
$numReady = socket_select( $readSockets, $writeSockets, $exceptSockets, $timeout );
if ( $numReady === false ) {
wfDebugLog( 'squid', __METHOD__ . ': Error in stream_select: ' .
socket_strerror( socket_last_error() ) . "\n" );
if ( $numReady === false ) {
wfDebugLog( 'squid', __METHOD__ . ': Error in stream_select: ' .
socket_strerror( socket_last_error() ) . "\n" );