Creating Daemons with PHP

Transcript

1. Creating
   Daemons with
   PHP
   Persistent background tasks in linux
   

   View Slide

2. Long living PHP scripts
   ● Never run them from the browser or from the
   web server.
   ● Browser can time out.
   ● Web server times out.
   ● Solution: Run from the command line on
   the server.
   

   View Slide

3. Old Way
   #!/usr/bin/php
   while (true){
   do_epic_long_running_task();
   sleep(1);
   }
   

   View Slide

4. The Proper Way
   ● Use PHP Process Control extension.
   ● “... implements the Unix style of process
   creation, program execution, signal handling
   and process termination.”
   ● http://sg2.php.net/pcntl
   ● Example: http://sg2.php.net/manual/en/pcntl.
   example.php
   

   View Slide

5. An Easier Way
   ● Use Clio - Lightweight utility and helper
   classes for PHP CLI applications
   ● https://github.com/nramenta/clio
   ● Example:
   ○ https://github.com/CoderKungfu/php-
   queue/tree/master/demo/runners
   

   View Slide

6. Making the Daemon Service
   (CentOS/Redhat)
   Add this to the top:
   And run this command:
   #!/usr/bin/php
   #
   # MyAwesomeDaemon Starts the PHP-Queue runner for BlahDaemon
   #
   # chkconfig: - 91 91
   # description: Runner for blah daemon.
   $ chkconfig --levels 235 BeanstalkSampleDaemon on
   

   View Slide