Is there a way I can record when the stderr is printed to a log file?

Question

I'm running the command

php someFile.php 1>> stdout.txt 2>> stderr.txt

Is there a way I can record when the stderr is printed?

Answer 1

Excellent question, I didn't know how to pipe stderr but I found the answer here.

Then, when you've got your stderr piped, you can just replace every beginning of line (^) by the message you want. Here I called the date command to display the time.

php someFile.php 2>&1 >> stdout.txt | sed "s/^/`date +'Error received the %d:%m:%y at %H:%M:%S : '`/" >> stderr.txt

Answer 2

Check out this book on the Linux Command Line a lot of good info.