Sage monks

I need to do a good amount of text replacement in a series of old style JSP pages (they used to call them JHTML...). I wrote a perl script to do it and much of it works fine, except for backreferences. I tried it on the command line and found it works fine: 

> echo 'JHTML `Java in here` code' | perl -p -e 's/`(.*)`/<%=$1%>/go'
>
> JHTML <%=Java in here%> code

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However, when I use it in a script, it does not work: 
> echo 'JHTML `Java in here` code' | ./myReplace.pl '`(.*)`' '<%=$1%>'
>
> About to replace: s/`(.*)`/<%=$1%>/go
> JHTML <%=$1%> code

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Where "myReplace.pl" is 
#!/usr/bin/perl -w

my $searchExp = $ARGV[0];
my $replaceExp = $ARGV[1];
my $textIn = <STDIN>;
my $count = 0;

# Do the replacing
print("About to replace: s/$searchExp/$replaceExp/go \n");
$count = ($textIn =~ s/$searchExp/$replaceExp/go);

if ($count > 0) {
   print $textIn;
}

exit;

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myReplace.pl above is stripped to show only what doesn't work... I wondered if the shell required some extra escaping in the $1, but the print line appears to show that the script got the $1 fine. I also tried having the expressions and replacements read from a CSV file (my initial plan, actually) but that does not work either.

Sorry if this is an obvious mistake - I cannot find it myself, and would appreciate your help.

A.

In reply to Backreference woes by bemfica

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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