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Twey: Thanks for the tip I've never heard that before. Also I might have done my math wrong, but won't your code only run update() once a day. I think it should be this.
PHP Code:<?php
define('DATA_FILE', 'update_tracker.dat');
$c = floor(date('U') / 60 / 60);
//Removed the extra /24 above
$fc = file(DATA_FILE) or die('Failed to open file for reading.');
$l = $fc[0];
while($l++ < $c)
update();
$f = fopen(DATA_FILE, 'w') or die('Failed to open file for writing.');
fwrite($f, $c);
fclose($f);
?>
I understand the functions going on in that script, but can one of you please explain to me the theory behind the script? Like, the while loop in particular.
The file update_tracker.dat is used to keep track of when update() was last run.When the script loads it compares the current time($c) to the time held in update_tracker.dat($l).The while loop is used to run update() once for every hour that has passed.Then the current time is saved to update_tracker.dat
Yep, you're right. I was never good at maths. :pQuote:
Also I might have done my math wrong, but won't your code only run update() once a day.
Dang this is confusing. :o
I get everything except, lets say someone accesses the page and that script is run, then 2 hours later the script is run again, that would write to the file something like 2:00pm, 4:00pm, but it would leave out 3:00pm so wouldn't the update not happen at 3?
That's what my code is for.
Breaking them both down into English, on each access, blm126's code willMine will
- open the file and check if it's been run this hour;
- if so, run the function;
- update the file.
The updates won't necessarily happen on time, but they will all happen.
- open the file and check when it was last run;
- for each hour in which it wasn't run, call the function once;
- update the file.
Ooooohhhh.
Okay, now i get it. I'm not good with date functions nor file functions. :p
Thanks. :D