The documentation is lacking, but if the discussion group is any indication, real docs are a high priority for the project team. Today, I visited the IRC channel to ask for a status update on docs for the PHP extension api (as opposed to the PEAR all-script api, whose auto-generated docs are broken). Turns out my suspicions were right. Documentation is a high priority and none currently exists for the api in question. However… I was informed that the classes support reflection… so

A quick grep of the source for the extension tells me that I am looking at four classes: GearmanClient, GearmanWorker, GearmanJob, and GearmanTask. A ridiculously short php script later…

<?
Reflection::export( new ReflectionClass('GearmanWorker') );
Reflection::export( new ReflectionClass('GearmanClient') );
Reflection::export( new ReflectionClass('GearmanJob') );
Reflection::export( new ReflectionClass('GearmanTask') );
?>

And I can at least try to make a human readable list of available methods.

GearmanWorker

• __construct()
• clone()
• error()
• returnCode()
• setOptions( $option, $data )
• addServer( $host, $port ) – both args optional, examples say defaults are localhost on port 4730.
• addFunction( $function_name, $function, $data, $timeout ) – data and timeout optional
• work()

GearmanClient

• __construct()
• clone()
• error()
• setOptions( $option, $data )
• addServer( $host, $port ) – reflection says REQUIRED, however the provided examples and personal experience says otherwise
• do( $function_name, $workload, $unique ) – unique is optional
• doHigh( $function_name, $workload, $unique ) – unique is optional
• doLow( $function_name, $workload, $unique ) – unique is optional
• doJobHandle()
• doStatus()
• doBackground( $function_name, $workload, $unique ) – unique is optional
• doHighBackground( $function_name, $workload, $unique ) – unique is optional
• doLowBackground( $function_name, $workload, $unique ) – unique is optional
• jobStatus( $job_handle )
• echo( $workload )
• addTask( $function_name, $workload, $data, $unique ) – data and unique are optional
• addTaskHigh( $function_name, $workload, $data, $unique ) – data and unique are optional
• addTaskLow( $function_name, $workload, $data, $unique ) – data and unique are optional
• addTaskBackground( $function_name, $workload, $data, $unique ) – data and unique are optional
• addTaskHighBackground( $function_name, $workload, $data, $unique ) – data and unique are optional
• addTaskLowBackground( $function_name, $workload, $data, $unique ) – data and unique are optional
• addTaskStatus( $job_handle, $data ) – data is optional
• setWorkloadCallback( $callback )
• setCreatedCallback( $callback)
• setClientCallback( $callback)
• setWarningCallback( $callback)
• setStatusCallback( $callback)
• setCompleteCallback( $callback)
• setExceptionCallback( $callback)
• setFailCallback( $callback)
• clearCallbacks()
• data()
• setData( $data )
• runTasks()

GearmanJob

• __construct()
• returnCode()
• workload()
• workloadSize()
• warning( $warning )
• status( $numerator, $denominator )
• handle()
• unique()
• data( $data )
• complete( $result )
• exception( $exception )
• fail()
• functionName()
• setReturn( $gearman_return_t )

GearmanTask

• __construct()
• returnCode()
• create()
• free()
• function()
• uuid()
• jobHandle()
• isKnown()
• isRunning()
• taskNumerator()
• taskDenominator()
• data()
• dataSize()
• takeData( $task_object ) – optional
• sendData( $data )
• recvData( $data_len )

The extension also appears to expose all constants defined in the C api.

I have since added this to the official wiki – so there are at least SOME docs on the site now