You want to look at the /s switch on the s/// operator. For instance, with the following code (in a one-liner with -l):
my $str = q{this is "a test}
. qq{\n}
. q{this is "only a "poor "test};
print $str;
print qq{=====};
$str =~ s/"[^"]+"//gs;
print $str;
I get the following result, which is similar to what you indicated you needed:
this is "a test
this is "only a "poor "test
=====
this is only a test
Hope that helps.
Update: 2011-03-09
I cannot help but second roboticus's references and suggestions. There is much useful information (and I now have another module to take a look at when I have "spare" time available again). :)
Update: 2011-03-09
It appears as if the module in question may be YAPE::Regex::Explain (as I found when I tried installing it to play with it myself).
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