Databases
StackOverflow2013
Postsdbo
POHow to Build a PHP Queue System
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to Build a PHP Queue System
    primarykey
    data
    text
    <p>I had to build a PHP Queue System, and found this brilliant article <a href="http://squirrelshaterobots.com/programming/php/building-a-queue-server-in-php-part-1-understanding-the-project/" rel="noreferrer">http://squirrelshaterobots.com/programming/php/building-a-queue-server-in-php-part-1-understanding-the-project/</a> and I used it to create a PHP queue system, its very easy to set-up and use.</p> <p>Below is the code for queue.php, run from shell (puTTy or somesuch).</p> <pre><code>&lt;?PHP //. set this constant to false if we ever need to debug //. the application in a terminal. define('QUEUESERVER_FORK', true); //////// fork into a background process //////// if(QUEUESERVER_FORK){ $pid = pcntl_fork(); if($pid === -1) die('error: unable to fork.'); else if($pid) exit(0); posix_setsid(); sleep(1); ob_start(); } $queue = array(); //////// setup our named pipe //////// $pipefile = '/tmp/queueserver-input'; if(file_exists($pipefile)) if(!unlink($pipefile)) die('unable to remove stale file'); umask(0); if(!posix_mkfifo($pipefile, 0666)) die('unable to create named pipe'); $pipe = fopen($pipefile,'r+'); if(!$pipe) die('unable to open the named pipe'); stream_set_blocking($pipe, false); //////// process the queue //////// while(1){ while($input = trim(fgets($pipe))){ stream_set_blocking($pipe, false); $queue[] = $input; } $job = current($queue); $jobkey = key($queue); if($job){ echo 'processing job ', $job, PHP_EOL; process($job); next($queue); unset($job, $queue[$jobkey]); }else{ echo 'no jobs to do - waiting...', PHP_EOL; stream_set_blocking($pipe, true); } if(QUEUESERVER_FORK) ob_clean(); } ?&gt; </code></pre> <p>The hardest part was getting the pcntl functions to work on my server. </p> <p>My question is "How do i get the job to start automatically when/if the server has to restart?"</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USFolding Circles
    1. USFolding Circles
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to Build a PHP Queue System
      1. This table or related slice is empty.
      1. VTModeratorReview
    2. VO
      singulars
      1. POHow to Build a PHP Queue System
      1. USI'll-Be-Back
      1. VTFavorite
    3. VO
      singulars
      1. POHow to Build a PHP Queue System
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhat, exactly, _is_ your question?
      singulars
      1. POHow to Build a PHP Queue System
      1. USMartin Bean
    2. CO@MartinBean How do i get the job to start automatically when/if the server has to restart?
      singulars
      1. POHow to Build a PHP Queue System
      1. USFolding Circles
    3. COyou can modify server starting script to do this, or you can add script which will report state of script/server and second script for restarting a job and then use them both from local or remote host to monitor server/restart job (with cronjob)
      singulars
      1. POHow to Build a PHP Queue System
      1. USllamerr
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload