Influenced by: Raku Python
Perl is a dynamic, text-slinging glue language created by Larry Wall in 1987, born to make practical extraction and reporting feel effortless. Its signature blend of first-class regular expressions, sigils, contextual evaluation, and the vast CPAN module archive earned it the nickname "the duct tape of the Internet." Famously governed by the motto TIMTOWTDI ("there's more than one way to do it"), Perl prizes expressiveness and the programmer's freedom over enforced uniformity.
What makes it distinctive
- First-class regular expressions baked into the syntax —
=~,s///,tr///, named captures(?<name>...)and%+— and the PCRE dialect those grammar choices inspired across the industry. - Sigils mark variable type at the use site:
$scalar,@array,%hash— so the symbol tells you what kind of thing you're touching. - Context is a core semantic: the same expression yields different results in scalar vs list context (e.g.
my $n = @arraygives the length). - TIMTOWTDI — "There's More Than One Way To Do It" — an explicit design philosophy favoring programmer expressiveness over a single blessed style.
- CPAN: the pioneering comprehensive module archive that defined what a language package ecosystem looks like.
- Unmatched as a one-liner / glue language:
perl -ne,-pe,-imake shell text-munging trivial and ubiquitous in sysadmin work. - A linguist's design sensibility — Larry Wall borrowed ideas like "easy things easy, hard things possible" and Huffman-coded common operations to be short.
- A modern declarative object system (Corinna:
class/field/method) now built into core, alongside the classic blessed-reference OO. - Rich, irreverent culture: the Camel Book mascot, JAPHs, Perl golf, and
Acme::joke modules on CPAN.
History
Larry Wall — a linguist by training before he was a programmer — began writing Perl in 1987 while working at System Development Corporation (later part of Unisys), frustrated that the existing Unix toolbox (awk, sed, the shell, C) each solved part of a reporting problem but none solved the whole. He released Perl 1.0 to the comp.sources.misc Usenet newsgroup on December 18, 1987. The name was originally going to be Pearl, after the "pearl of great price" parable, but on discovering an existing language called PEARL he dropped the a; the backronym Practical Extraction and Report Language (and the cheekier Pathologically Eclectic Rubbish Lister) came afterward.
Early versions grew quickly: Perl 2 (1988) substantially rewrote the regular-expression engine, and Perl 3 (1989) added binary-data handling and shipped under the GNU GPL. Perl 4 (1991) is best remembered as the version documented by the first edition of Programming Perl — the famous "Camel Book" from O'Reilly, which is why a dromedary became the language's de facto mascot. Perl 4 was essentially a stabilization release rather than a redesign.
The transformative release was Perl 5.000 on October 17, 1994. It was a near-total rewrite of the interpreter and introduced references, real data structures, lexically-scoped my variables, packages and modules, and a bolt-on but workable object system built on blessed references. Crucially, Perl 5 made the language extensible: anyone could ship reusable modules. That capability was institutionalized on October 26, 1995, when the Comprehensive Perl Archive Network (CPAN) went live — the first large-scale open-source package archive, and the spiritual ancestor of npm, RubyGems, PyPI, and Cargo.
Perl's rise tracked the rise of the Web. Through the mid-to-late 1990s it became the dominant language for CGI scripting, powering a large share of the early dynamic Web; its strength at gluing together text, files, processes, and databases is exactly what made it "the duct tape of the Internet." The community grew a distinctive culture of one-liners, the perl -e/-n/-p command-line idioms, golf, JAPHs ("Just Another Perl Hacker"), and Wall's annual State-of-the-Onion talks.
In 2000, Larry Wall announced Perl 6 as a community-designed, backward-incompatible redesign. It turned into one of computing's longest gestations, evolving through Wall's "Apocalypses" and the Pugs and Rakudo implementations. Rather than supersede Perl 5, it diverged into a separate language; in 2019 it was formally renamed Raku to end years of confusion, becoming Perl's acknowledged "sister language" rather than its successor.
Perl 5 itself never stopped evolving. The project adopted a regular release cadence (5.10, 5.12, … each roughly annually), adding say, the // defined-or operator, smart features, subroutine signatures, and postfix dereferencing. The most significant recent change is a built-in, declarative object system — codenamed Corinna — landing experimentally in Perl 5.38 (2023) with class, field, method, and ADJUST, and refined in 5.40 (June 2024) with field accessor attributes like :reader.
Today Perl 5 remains actively maintained — the stable line sits in the 5.40 / 5.42 range as of 2026 — and continues to anchor system administration, bioinformatics, log and text processing, legacy web stacks, and countless build and deployment pipelines. Its influence is broad: it popularized Perl-Compatible Regular Expressions (PCRE), now embedded in PHP, Java, .NET, JavaScript, Python, and editors everywhere.