Something like: 

$a = "VAR_A";
$b = qq[
    package Nowhere; 
    local ( $/, $_, $@, $0, $a, $b ); ## etc.
    print "VAR_B (\$a)\n";
];

eval $b;

[download]

I'm not quite sure what you expect from \$a though, except an error?

Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
"Memory, processor, disk in that order on the hardware side. Algorithm, algorithm, algorithm on the code side." - tachyon

In reply to Re: limiting scope of 'eval'?? by BrowserUk
in thread limiting scope of 'eval'?? by ManFromNeptune

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