PHP Classes

Virtual Cron: Check whether it is time to run a periodical task

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virtualcron 0.1GNU Lesser Genera...4.0Time and Date


This class can be used to check whether it is time to run a task that must run from time to time.

It creates a control file to keep track the last time the task was scheduled.

The class can check the control file last modification time to determined whether it passed a given period of time since the last time the task was run.

If the given interval time has passed since the last run, the class recreates the control file and returns true to inform the application that is time to run the task again.

Innovation Award
PHP Programming Innovation award nominee
March 2007
Number 4

Prize: One downloadable copy of PhpED Professional
Many Web applications need to execute periodical tasks, like sending newsletters, processing pending e-commerce orders, etc..

Some operating systems come with programs, like cron or at, to execute scheduled tasks. However, under some Web hosting environments these programs cannot be used.

This class provides an alternative solution that can be used in more restricted hosting environments.

It uses files to keep track of the last time when a periodical task was executed.

The site Web page scripts can use the class to check these files. The class can tell when it is time to execute a task again. When it is time, the same script can execute the scheduled task without depending on external programs.

Manuel Lemos
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  Files folder image Files  
File Role Description
Accessible without login Plain text file virtualcron.php Class the virtual cron class source
Plain text file virtualcron.txt Data the control file
Plain text file example.php Example a little example

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User Ratings User Comments (3)
 All time
simple and good.
10 years ago (ahnhw)
Great, simple and effective class.
14 years ago (Laurie Cowcher)
Does what it should.
14 years ago (Jamie Telin)