04-24-2013
I agree there is a potential problem with renaming the logfile, that maybe some data might be lost or something go wrong with the process of writing to the logfile. I was just trying to suggest something as an alternative to blanking out the file, but I would do neither.
What if you just gzip the file, and let it keep growing? You will have a 100% sure valid zip file, and you are 100% sure the log file will not be damaged, and you will be 100% sure that no data are lost. It's blanking out the log file or renaming the log file that introduces the data loss potential.
The zip file might fail to collect all the data in the log file, but it doesn't matter. The data are still in the log file. The zip file is complete as of some time point.
Maybe there is some reason you need to blank out (truncate) the log file?
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LEARN ABOUT PHP
xslt_set_log
XSLT_SET_LOG(3) 1 XSLT_SET_LOG(3)
xslt_set_log - Set the log file to write log messages to
SYNOPSIS
void xslt_set_log (resource $xh, [mixed $log])
DESCRIPTION
This function allows you to set the file in which you want XSLT log messages to, XSLT log messages are different than error messages, in
that log messages are not actually error messages but rather messages related to the state of the XSLT processor. They are useful for
debugging XSLT, when something goes wrong.
By default logging is disabled, in order to enable logging you must first call xslt_set_log(3) with a boolean parameter which enables log-
ging, then if you want to set the log file to debug to, you must then pass it a string containing the filename.
PARAMETERS
o $
xh -The XSLT processor link identifier, created with xslt_create(3).
o $log
- This parameter is either a boolean value which toggles logging on and off, or a string containing the logfile in which log
errors too.
RETURN VALUES
No value is returned.
NOTES
Note
Please note that file:// is needed in front of the path when using Windows.
EXAMPLES
Example #1
Using the XSLT Logging features
<?php
$xh = xslt_create();
xslt_set_log($xh, true);
xslt_set_log($xh, getcwd() . '/myfile.log');
$result = xslt_process($xh, 'dog.xml', 'pets.xsl');
echo $result;
xslt_free($xh);
?>
PHP Documentation Group XSLT_SET_LOG(3)