pseudo-cron v1.3 for seo-pages
|
|||
Download (ZIP, 13 KB), Source code
Talk to others and download addons at the forum!
Usually regular tasks like backup up the site’s database are run using cron jobs. With cron jobs, you can exactly plan when a certain command is to be executed. But most homepage owners can’t create cron jobs on their web server – providers demand some extra money for that.
The only thing that’s certain to happen quite regularly on a web page are page requests. This is where pseudo-cron comes into play: With every page request it checks if any cron jobs should have been run since the previous request. If there are, they are run and logged.
These pages use pseudo-cron:
Suchmaschinenoptimierung Heidelberg
Suchmaschinenoptimierung Mannheim
Suchmaschinenoptimierung Frankfurt
Suchmaschinenoptimierung Mainz
Suchmaschinenoptimierung Wiesbaden
Suchmaschinenoptimierung Heilbronn
Suchmaschinenoptimierung Karlsruhe
Suchmaschinenoptimierung Aschaffenburg
Suchmaschinenoptimierung Augsburg
Suchmaschinenoptimierung Freiburg
Suchmaschinenoptimierung Koblenz
Suchmaschinenoptimierung Nürnberg
Suchmaschinenoptimierung Regensburg
Suchmaschinenoptimierung Rosenheim
Suchmaschinenoptimierung Saarbrücken
Suchmaschinenoptimierung Trier
Suchmaschinenoptimierung Würzburg
Pseudo-cron uses a syntax very much like the Unix cron’s one. For an overview of the syntax used, see a page of the UNIXGEEKS. The syntax pseudo-cron uses is different from the one described on that page in the following points:
- you may not use abbreviations (Mon, Tue, …) for day of week new in v1.1!
- there is no user column
- the executed command has to be an include()able file (which may contain further PHP code)
All job definitions are made in a text file on the server with a user-definable name (usually crontab.txt). Here is an example of a valid crontab file:
#comments start with '#' #mi h d m dow job comment 0 5 * * Sun cronjobs/dump.inc.php # make db dump every sunday at 5 am 40 5 2 * * cronjobs/sendlog.inc.php # send last month's web server logs */15 8-19 * * Mon-Fri cronjobs/refr_ext.inc.php # refresh external news sources
The last line will call cronjobs/refr_ext.inc.php every 15 minutes between 8am and 7pm on Monday to Friday.
| Features: | runs any PHP script periodical or time-controlled script execution logs all executed jobs can be run from an IMG tag in an HTML page follows Unix cron syntax for crontabs sends an email with the results |
| Usage: | Modify the variables in the config section below to match your server. Write a PHP script that does the job you want to be run regularly. Be sure that any paths in it are relative to the script that include()s pseudo-cron. Set up your crontab file with your script Include pseudo-cron.inc.php in a high traffic page Wait for the next scheduled run 🙂 |
| Note: | You can log messages from your job script to pseudo-cron’s log file by calling logMessage("log a message") |
Version history:
| v1.3 | 15.06.04 added: the number of jobs run during one call of pseudocron can now be limited. added: additional script to call pseudocron from an HTML img tag improved storage of job run times fixed a bug with jobs marked as run although they did not complete |
| v1.2.2 | 17.01.04 added: send an email for each completed job improved: easier cron job configuration (relative to pseudo-cron, not to calling script. Please read the release notes in the source. |
| v1.2.1 | 03.02.03 fixed: jobs may be run too often under certain conditions added: global debug switch |
| v1.2 | 31.01.03 added: more documentation changed: log file should now be easier to use changed: log file name |
| v1.1 | 29.01.03 changed: renamed pseudo-cron.php to pseudo-cron.inc.php fixed: comments at the end of a line don’t work fixed: empty lines in crontab file create nonsense jobs changed: log file grows big very quickly changed: included config file in main file to avoid directory confusion added: day of week abbreviations may now be used (three letters, english) |
| v1.0 | initial release |