See perldoc perlrun and the -i operator (along with -p and -n (-p in your case)).
perl -pi.bak -e 's#\Qhere.company.com/pagedir#there.company.com/#g' fi
+le1 file2 etc...

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Otherwise you are going to have to open a new output file, print to it, then rename the new file to the old file name, which is what the -i switch implicitly does.

In reply to Re: Read from a file and replace by runrig
in thread Read from a file and replace by toddler

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