list of all the $env variables

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

Replies are listed 'Best First'.
Re: list of all the $env variables by biosysadmin (Deacon) on May 08, 2004 at 19:54 UTC
As merlyn said, all of your environment variables are stored in the %ENV hash. To list them, just iterate over the members of a hash. Here's how I would do it: `print "List of all environment variables:\n"; while ( my($env_name,$env_value) = each %ENV ) { print "\t$env_name = $env_value\n"; }` [download]	[reply] [d/l]
•Re: list of all the $env variables by merlyn (Sage) on May 08, 2004 at 19:50 UTC
There's only one `$env` variable, and it starts out undeclared. Perhaps you mean `%ENV`? In which case, a simple loop will dump them, or just go into the debugger and enter `x \%ENV`. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]
Re: list of all the $env variables by eXile (Priest) on May 08, 2004 at 20:06 UTC
If your question is targeted to CGI-programming you might find the ubiquitous `env.pl` script useful: `#!/bin/perl print "Content-type: text/html\n\n"; print "<HTML>\n"; print "<TITLE>Server-provided Environment variables</TITLE>"; print "<BODY>\n"; print "<TABLE>\n"; print "<TR><TD colspan=2 align=center>Environment Variables</TD></TR>\ +n"; foreach my $x (keys %ENV) { print "<TR><TD>$x</TD><TD>$ENV{$x}</TD></TR>\n"; } print "</TABLE></BODY></HTML>\n";` [download] Put it in your `cgi-bin` (if it's not already there, I think it comes default with apache). Be sure it is executable by the user the webserver runs as. Otherwise google for an active env.pl on somebody elses webserver.	[reply] [d/l] [select]
•Re: Re: list of all the $env variables by merlyn (Sage) on May 08, 2004 at 20:12 UTC
You forgot to escape the HTML of the variables! Maybe you meant: `use CGI qw(header); print header('text/plain'); for (sort keys %ENV) { print "$_ => $ENV{$_}\n"; }` [download] -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply] [d/l]
Re: Â•Re: Re: list of all the $env variables by eXile (Priest) on May 08, 2004 at 20:23 UTC
Being really lazy (being a virtue, yada yada), I just cut-and-paste the first `env.pl` I found googling. I agree doing this text/plain is way better.	[reply] [d/l]
Re: Re: Ă‚Â•Re: Re: list of all the $env variables by defyance (Curate) on May 08, 2004 at 21:34 UTC
Re: Re: Re: Ă‚Â•Re: Re: list of all the $env variables by Juerd (Abbot) on May 08, 2004 at 22:33 UTC
Some notes below your chosen depth have not been shown here
Re: list of all the $env variables by b10m (Vicar) on May 08, 2004 at 20:05 UTC
Maybe you mean the Apache environment variables? -- b10m All code is usually tested, but rarely trusted.	[reply]


There's more than one way to do things
	PerlMonks