backendrulz/javascript-unpacker

PHP helper that makes easy to unpack JavaScript code packed by Dean Edwards packer tool

v1.1.0 2026-02-16 01:55 UTC

Requires

• php: >=8.3.0

Requires (Dev)

• laravel/pint: ^1.27
• pestphp/pest: ^4.3
• phpstan/phpstan: ^2.1
• rector/rector: ^2.3

MIT

• Andrey Izman
• Cristian Ferreyra

README

Makes it easy to unpack JavaScript code packed by Dean Edwards packer tool. Supports all known encodings. The input script may contain multiple encoded code blocks, mixed with non-encoded code, and supports repeatedly encoded code.

Installation via Composer

composer require "backendrulz/javascript-unpacker"

Usage

echo JavaScriptUnpacker::unpack(file_get_contents('/path/to/packed.js'));

Unpack JavaScript via PHP eval(function(p,a,c,k,e,d)

$js =<<<JS
eval(function(p,a,c,k,e,r){e=String;if(!''.replace(/^/,String)){while(c--)r[c]=k[c]||c;k=[function(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('0.1(\'2 3!\');',4,4,'console|log|Hello|world'.split('|'),0,{}));
JS;

echo JavaScriptUnpacker::unpack($js);
// output: console.log('Hello world!');;

Requirements

PHP >= 8.3

Testing

composer test

License

MIT