Internationalization t-strings

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I'm using this command to find all t-strings in a package. However, it seems to skip t()-strings that are commented out. Is there a way to include those as well? I couldn't find anything in the documentation!

#!/bin/sh
rm catalog.po -f
touch catalog.po
find ./../ -iname '*.php' -exec xgettext --default-domain=catalog --from-code=utf-8 --keyword=t --language=PHP -p ./ -j {} \;

A3020