What Environmental Variables are Available

In PERL, to view all Environmental Variables type:

foreach $ev(keys %ENV) {
print "$ev - $ENV{$ev}<br>";
}

The Environmental Variables names will be in all caps on the left while their value is on the right.

To access any of these Environmental Variables anytime, just type $ENV{'VAR_NAME'} where VAR_NAME is the name of the Environmental Variable:

Example:

For the query string:
$ENV{'QUERY_STRING'}

For the user's IP address:
$ENV{'REMOTE_ADDR'}



Copy and Paste Perl Code:

#!/usr/bin/perl

print "Content-type:text/html\n\n";

foreach $ev(keys %ENV) {
print "$ev - $ENV{$ev}<br>";
}

exit;

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