Not only the $ but also the ' 
perl -pi <<'PRG_END'
s|<!--#include virtual="/ssi/footer.txt"-->|<?php include(\$_SERVER['D
+OCUMENT_ROOT'].'/ssi/footer.txt'); ?>|g;
PRG_END

[download]
s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

In reply to Re: regex question with balanced text by Skeeve
in thread regex question with balanced text by hmbscully

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