Failover implementation in PEAR Net_Gearman

pear_client.php

<?php
require_once 'Net/Gearman/Client.php';

while (true) {
        while (!process('reverse', 'hellp'));
        echo '.';
}

$gc = null;
function process($function, $data) {
        global $gc;
        try {
                if(!$gc) {
                        $gc = new Net_Gearman_Client(array(
                                '10.0.30.182:4730',
                                '10.0.30.181:4730',
                        ));     
                }       
                $set = new Net_Gearman_Set();
                $task = new Net_Gearman_Task($function, $data);
                $set->addTask($task);
                $gc->runSet($set);
                return true;
        } catch (Net_Gearman_Exception $e) {
                $gc = false;
                return false;
        }
}