----- Original Message -----
From: "Patrick Bierans"
> Bob schrieb:
>> I used to use the following to log specific errors:
>> <?php
>> $log = 'rejected';
>> if (filesize($log) > 20000) unlink($log);
>> $data = date('d-m-Y H:i:s')." [$fault]\r\n";
>> error_log($data,3,$log);
>> ?>
>> But, this meant that sometimes there would only be a few errors shown, if
>> the file had reached it's 20000 limit and deleted itself.
>>
>> So I created a rolling road log of a 100. This allows me to view trends
>> easier. I'm not sure how efficient this is, or whether it would be suitable
>> for high volume?
>> <?php
>> $log = 'rejected';
>> $data = date('d-m-Y H:i:s')." [$fault]\r\n";
>> if (file_exists($log))
>> {
>> $records = file($log);
>> array_unshift($records,$data);
>> if (count($records) > 100) array_pop($records);
>> $fp = fopen($log,'w');
>> foreach ($records as $item) fwrite($fp,$item);
>> fclose($fp);
>> }
>> else
>> {
>> $fp = fopen($log,'w');
>> fwrite($fp,$data);
>> fclose($fp);
>> }
>> ?>
>>
>> Has anyone got a better method, or can improve it?
>> Regards, Bob E.
>>
> Hi Bob!
>
> Of course there are many more ways of doing it.
> To tell you the harsh truth: (I hope you can handle it ;) )
> Loading a file into an array and using array shifting and than write
> that array into a file and that for every (!) log action - that is
> surely one of the worst. ;)
>
> I have two other ways for you:
>
> 1)
> if filesize of logfile exceeds 20k use fseek() to jump to position
> filesize()-10k and write the rest into a new file.
> delete old log and rename new file to log file name. This is the fastest.
>
> I cut down to 10k so you do not have to do it too often.
>
> If you want it a bit nicer you can start copying after finding a \n for
> the first time.
> But most times you only look at the tail - so nobody cares.
>
> Another way is cycling files:
>
> 2)
> If log reaches 10k rename it and start a new file with that name.
> "rejected.log" and "rejected.older.log" can be of use. ;)
>
> THe first is closer to what you tried but the second is far more performant.
>
> HTH,
> Patrick
Hi Patrick,
I had a feeling it wouldn't be very efficient, but couldn't think of another
way <big grin>.
I haven't bothered much with flat files lately. The last time was when you
helped me out deleting semaphore files older than x minutes, back in 2005. I
still have your emails printed out as reference.
Thanks Patrick, I'll try both suggestions.
Regards, Bob E.
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