Any string starting with underscore '_' will be replaced.

[maciejkrol]

Example code:

/*global console*/

(function () {
    'use strict';

    var var1 = 'this is correct';
    var var2 = '_this will be encoded';
    var var3 = 'and _here as _well.';

    console.log(var1);
    console.log(var2);
    console.log(var3);

}());

When obfuscated using:

$packer = new \Tholu\Packer\Packer($script, 'Normal', true, true, true);
$script = $packer->pack();

Gives this output when run:

this is correct
_0 will be encoded
and _1 as _2.

This is highly undesired and caused me a lot of troubles.

[tholu]

This is intended behavior if the $specialChars option is set, try this instead:

$packer = new \Tholu\Packer\Packer($script, 'Normal', true, false, true);

[maciejkrol]

Ok I made some more experiments to understand that. However, this still seems to be a bit strange for me.

[tholu]

@maciejkrol This is by design (see http://dean.edwards.name/packer/2/usage/ for a better explanation), however I did not design this library - I just packaged it.