To write the Gearman client or worker in PHP there are 2 options available:
1) Net_Gearman pear package: http://pear.php.net/package/Net_Gearman/download/0.1.1
2) Gearman PHP Extension: http://www.gearman.org/doku.php?id=download
As per my experiments, Net_Gearman does not processes all requests when multiple (more than 5) simultaneous clients are sending requests.
The PHP extension available on gearman.org is better and initial tests are encouraging.
I encourage using the Gearman server and library available on gearman.org as well.
