GearmanWorker
GearmanWorker::addOptions
GearmanWorker
PHP Manual

# GearmanWorker::addFunction

(PECL gearman >= 0.5.0)

GearmanWorker::addFunction — Register and add callback function

### Description

public bool GearmanWorker::addFunction ( string `$function_name` , callable `$function` [, mixed `&$context` [, int `$timeout` ]] )

Registers a function name with the job server and specifies a callback corresponding to that function. Optionally specify extra application context data to be used when the callback is called and a timeout.

### Parameters

`function_name`

  The name of a function to register with the job server

`function`

  A callback that gets called when a job for the registered function name is submitted

`context`

  A reference to arbitrary application context data that can be modified by the worker function

`timeout`

  An interval of time in seconds

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

Example #1 Simple worker making use of extra application context data

`<?php
# get a gearman worker
$worker= new GearmanWorker();
# add the default server (localhost)
$worker->addServer();
# define a variable to hold application data
$count= 0;
# add the "reverse" function
$worker->addFunction("reverse", "reverse_cb", $count);
# start the worker
while ($worker->work());
function reverse_cb($job, &$count)
{
$count++;
return "$count: " . strrev($job->workload());
}
?>`

Running a client that submits two jobs for the reverse function would have output similar to the following:

    1: olleh
    2: dlrow

### See Also

- GearmanClient::do() - Run a single task and return a result [deprecated]

GearmanWorker
GearmanWorker::addOptions
GearmanWorker
PHP Manual