Where does PDO object fits best when the worker is a long running process. It is having the problem with MySQL server has gone away http://dev.mysql.com/doc/refman/5.1/en/gone-away.html

client.php

<?php
// Reverse Client Code
$client= new GearmanClient();
$client->addServer("127.0.0.1", "4730");
$data = array(
    'something' => rand(1, 1000),
);
$client->setCompleteCallback(function ($task) {
    print "COMPLETE: " . $task->unique() . ", " . $task->data() . "\n";
});
$client->setFailCallback(function ($task) {
    print "Failed: " . $task->unique() . ", " . $task->data() . "\n";
});
$client->addTaskBackground('reverse', json_encode($data));
$client->addTask('reverse', json_encode(array()));
$client->addTaskBackground('reverse', json_encode($data));
$client->runTasks();

worker1.php

<?php
// Reverse worker Code
$worker= new GearmanWorker();
$worker->addServer("127.0.0.1", "4730");
$worker->addFunction("reverse", function ($job) {
    // use pdo here ? I feel no
    $pdo = new PDO();
    $payload = json_decode($job->workload());
    echo " Processing $payload->something" . PHP_EOL;
    if (! isset($payload->something)) {
        throw new Exception("Test whether things works! ");
    }
    return strrev($payload->something);
});
while ($worker->work());

worker2.php

<?php
// Reverse worker Code
$worker= new GearmanWorker();
$worker->addServer("127.0.0.1", "4730");
$pdo = new PDO()
$worker->addFunction("reverse", function ($job) use ($pdo) {
    $payload = json_decode($job->workload());
    echo " Processing $payload->something" . PHP_EOL;
    if (! isset($payload->something)) {
        throw new Exception("Test whether things works! ");
    }
    return strrev($payload->something);
});
while ($worker->work());