I am trying to come up with universal code :) that will extract value between $StartTag value $EndTag from single line. I am having problem when special characters are involved. 
my $line = <DATA>;
my @wanted_substrings=();
#No Problem
#my $StartTag='START';
#my $EndTag='END';

#Error Unmatched ) in regex; marked by <-- HERE in m/TRicky\(.*?)
#my $StartTag="TRicky\\";
#my $EndTag="\\endTricky";

#No Error but no value VALUE
#my $StartTag="Next\$";
#my $EndTag="\^Next";

#No Error but no value VALUE
my $StartTag="Last\+";
my $EndTag="\+some";
       if ($line=~/$StartTag(.*?)$EndTag/g)
    {
       push(@wanted_substrings,$1) ;

       }
print join "\n", @wanted_substrings;
__DATA__
CharSTARTanotherENDCharTRicky\VALUEE\endTrickyNext$VALUE^NextLast+VALU
+E+some

[download]
#Forgot to mention if I do not use $StartTag or $EndTag
# and insted use actual string that it will work.

#Instead
       if ($line=~/$StartTag(.*?)$EndTag/g)
#This one works
       if ($line=~/TRicky\\(.*?)\\endTricky/g)
#Problem is that I have to use varialble $ because 
#I am using it as an arg in my sub

sub getInfoFromSingleLineMultiLineFile
{
#$stag,$etag uses as arguments
    my ($InputFile,$stag,$etag)=@_;
    my ($line,@wanted_substrings);

    #Openning file for reading
    open(IFH,"$InputFile") || die "Can't open file: $InputFile\n";
      while($line=<IFH>)
      {
        if ($line =~ m/$stag(.*?)$etag/g)
        {
           push(@wanted_substrings,$1);
        }
      }
return @wanted_substrings;
}

[download]
Thanks in advance Gasho

In reply to Regular Expression problem when Extracting Start\ VALUE \End by gasho

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.