regex question with balanced text

hmbscully has asked for the wisdom of the Perl Monks concerning the following question:

Hi,

I'm attempting to convert a website from SSIs to PHP includes.

This is the perl and regex I'm using:

perl -pi -e 's||<?php include($_SERVER['DOCUMENT_ROOT'].'/ssi/footer.txt'); ?>|g'

Which matches and replaces the SSI with <?php include(./ssi/edfooter.txt); ?> losing the '$_SERVER['DOCUMENT_ROOT'].'' in translation.

I understand that the parens and the $ are causing the problems and things need escaped, but I've tried everything I can think of to try and escape that part. Each time I escape one thing or quote one part another way, it seems that there is another part of the expression that then can't be quoted. I'm not sure this match is even possible?

thanks!

I learn more and more about less and less until eventually I know everything about nothing.

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Re: regex question with balanced text by Skeeve (Parson) on Aug 28, 2007 at 15:55 UTC
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	[reply] [d/l] [select]
Re^2: regex question with balanced text by hmbscully (Scribe) on Aug 28, 2007 at 16:45 UTC
If I use the here doc, how do I use this in conjunction with xargs? I thought that required it to be a one-liner? `find /home/site/htdocs -name "*.html" \| xargs -n 1 perl -pi <<'PRG_END +' s\|<!--#include virtual="/ssi/footer.txt"-->\|<?php include(\$_SERVER['D +OCUMENT_ROOT'].'/ssi/footer.txt'); ?>\|g; PRG_END` [download] Thows errors like this: `Can't open perl script "s\|<!--#include": No such file or directory. Use -S to search $PATH for it. Can't open perl script "virtual=/ssi/edfooter.txt-->\|<?php": No such f +ile or directory. Use -S to search $PATH for it. Can't open perl script "include($_SERVER[DOCUMENT_ROOT]./ssi/edfooter. +txt);": No such file or directory. Use -S to search $PATH for it. Can't open perl script "?>\|g;": No such file or directory. Use -S to search $PATH for it.` [download] I learn more and more about less and less until eventually I know everything about nothing.	[reply] [d/l] [select]
Re: regex question with balanced text by Codon (Friar) on Aug 28, 2007 at 19:43 UTC
Your shell is getting you. You could put your one-liner into a file and specify that filename rather than the `-e 'string'` in the xargs command. `perl -pi ssi2php.pl` [download] Ivan Heffner Sr. Software Engineer WhitePages.com, Inc.	[reply] [d/l] [select]