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View Full Version : PHP MySQL give something in time increments without cron jobs?



motormichael12
08-10-2008, 09:02 PM
I have a MySQL table shown as the following (there are more fields but remover for the purpose of illustrating):


+----+-------------+--------+--------------+--------+--------------+
| id | username | energy | energy_total | health | health_total |
+----+-------------+--------+--------------+--------+--------------+
| 1 | Opalelement | 10 | 10 | 10 | 10 |
| 2 | DougFresh | 10 | 10 | 10 | 10 |
+----+-------------+--------+--------------+--------+--------------+

There are things you can do that take away energy, but I don't wnat to give it back all at once at any given time. What I wnat to do is maybe every 5 minutes after the last action that took some away, give one back until it is full.

My idea was to make a database structure like the following:


+----+-------------+--------+--------------+-------------+--------+--------------+-------------+
| id | username | energy | energy_total | energy_used | health | health_total | health_used |
+----+-------------+--------+--------------+-------------+--------+--------------+-------------+
| 1 | *********** | 10 | 10 | | 10 | 10 | |
| 2 | ********* | 10 | 10 | | 10 | 10 | |
+----+-------------+--------+--------------+-------------+--------+--------------+-------------+

*_used will be a unix timestamp value
Then use a query to select the *_used fields and do "time() - *_used"
Then divide the result by however long I want the increment to be
After doing that I will just do something like UPDATE users SET energy=energy+$add_energy because if it hasn't been enough time the $add_energy will be 0

That will of course be set to max out at the users energy_total

My questions are:
Would this be a good way to do this?
Is there a better way to do this?

Also, would this structure work instead and jsut compare everything to last_revoked?

+----+-------------+--------+--------------+--------+--------------+--------------+
| id | username | energy | energy_total | health | health_total | last_revoked |
+----+-------------+--------+--------------+--------+--------------+--------------+
| 1 | *********** | 10 | 10 | 10 | 10 | |
| 2 | ********* | 10 | 10 | 10 | 10 | |
+----+-------------+--------+--------------+--------+--------------+--------------+

techietim
08-10-2008, 10:35 PM
Without a cron job, that is the best way to do it. Congrats.

motormichael12
08-11-2008, 05:37 PM
Thanks