escaping output

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

I asked a question earlier about forking an exe from perl. I couldn't make it work with all the suggestions, but I found a nice perl module to do what I need called
Net::Syslog; it writes to a remote syslog daemon.

use Net:Syslog;
my $s=new Net::Syslog(SyslogHost=>'1.2.3.4');
$s->send('see this is in the 1.2.3.4 syslog file');
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works well, but I need to do this $s->send('$somevar'); and that yields "$somevar" in the remote syslog

I have tried ('"$somevar"') (`print "$somevar"`) and lots of others in the remote syslog in get literally $somevar, `print $somevar`, Can't find file somevar....

The closer I think I am the farther away I get.
Thanks

_{janitored by ybiC: Balanced <code> tags around code examples, minor format tweaks for legibility}

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Re: escaping output by davorg (Chancellor) on Aug 12, 2004 at 15:06 UTC
Variables aren't expanded in single quoted strings. `$s->send($somevar);` [download] -- <http://www.dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply] [d/l]
Re^2: escaping output by perlmonkee (Initiate) on Aug 12, 2004 at 15:29 UTC
thanks. simplest form of things often overlooked.	[reply]
Re: escaping output by etcshadow (Priest) on Aug 12, 2004 at 16:24 UTC
You should look in perldoc perlop in the "quotes and quote-like operators" section... but the short explanation is: double quotes "..." will expand variables. single quotes '...' will not expand variables. backticks `...` will expand variables AND execute the string as though it were a command typed at the shell, AND THEN take the output of that command as the value of `...`. For example: `$x = "oo"; "f$x"` (or just `"foo"`) would yield the same result as `'foo'`, which would also yield the same result as `echo foo` (well... except that echo would probably put a newline on the end, so it would be like "foo\n"... but whatever). `------------ :Wq Not an editor command: Wq` [download]	[reply] [d/l] [select]