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(PECL gearman >= 0.5.0)
GearmanWorker::addFunction — Register and add callback function
$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.
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
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
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