Creating Daemons with PHP

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1. Creating Daemons with PHP Persistent background tasks in linux
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.
3. Old Way #!/usr/bin/php <?php while (true){ do_epic_long_running_task(); sleep(1); }
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
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
6. Making the Daemon Service (CentOS/Redhat) Add this to the top: And run this command: #!/usr/bin/php <?php # # MyAwesomeDaemon Starts the PHP-Queue runner for BlahDaemon # # chkconfig: - 91 91 # description: Runner for blah daemon. $ chkconfig --levels 235 BeanstalkSampleDaemon on