Recording the parameters passed and pdf report generated with date and time

I have a php code from which i'll pass the parameters(like fieldnames,field width,logo alignment etc) to another pdf.php where the pdf report will be generated as per the details given.

problem is:
I have to record the date and time of the pdf generation along with the parameters passed so that user can refer anytime the modifications he made on that day/month etc.....How can i do this please help me its very urgent

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You can pass the current date and time to your pdf.php or just change your pdf.php to use something like:

      $now = date('D, M d Y H:i:s');

Then insert the value of $now wherever you want it.

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