Your question is really unclear, but from the phrasing and use of PSI::ESP, I infer the following question:

I am using PHP and PHP has the builtin functions implode and explode, which compress and decompress using the zlib library. Is there anything comparable in Perl?

If that was your question, then the answer is "yes". The module Compress::Zlib contains functions that do the same.

Quantum::Superpositions, among several of TheDamian's opus, is known to cause the user's head to explode. I never heard of any implosions, though.

Untested:

sub explode {
    my($s) = @_; $s =~ /./gs;
}
sub implode {
    join "", @_;
}
[download]

Update: added /s flag to handle strings with newlines. (The OP might never notice, I can't msg him.)

I assume that this is a reference to one or other of the compression formats?

If so, you might like to update your post to indicate which type of compression utility you are interested in.

Eg. ZIP, ARC, LHC, GZIP, BZ, BZ2 etc.