Decode DataLife Engine using nodejs + php (tested on DLE 11.2)

decode_dle.js

const fs = require('fs');
const path = require('path');
const exec = require('child_process').exec;

let dlePath = '/path/to/dle';
let index = 0;
let tmpFile = process.cwd() + '/tmp.php';

function readDirRecursively(dir) {
    let files = [];
    fs.readdirSync(dir).forEach(file => {
        let tmpPath = `${dir}/${file}`;
        if (fs.statSync(tmpPath).isFile() && file.slice(-4) === '.php') {
            files.push(tmpPath);
        }
        if (fs.statSync(tmpPath).isDirectory()) {
            files = files.concat(readDirRecursively(tmpPath));
        }
    });

    return files;
}
function decode() {
    let file = files[index];
    if (!file) {
        console.info('========================================================================');
        console.info('Done!');
        process.exit(0);
    }
    index++;
    let content = fs.readFileSync(file).toString();
    if (content.includes(';eval($_D')) {
        console.info(`${index}. Decoding file: ${file}`);
        fs.writeFile(tmpFile, content.replace(/__([A-Z]+)__/g, `'__BAKUP__$1__'`).replace(/eval\(\$_D\(\'([^\']+)\'\)\)/, "eval(str_replace('eval', 'echo', $_D('$1')))"), error => {
            if (error) {
                decode();
                console.error(error);
                console.info('Write tmp file Error');
                return;
            }
            exec(`php ${tmpFile}`, (error, contentDecoded) => {
                if (error) {
                    decode();
                    console.error(error);
                    return;
                }
                fs.writeFile(file, contentDecoded.replace(/'__BAKUP__([A-Z]+)__'/g, '__$1__')
                    .replace('?><?php', '<?php')
                    .replace('?><?PHP', '<?php')
                    .replace('<?PHP', '<?php'), err => {
                    if (err) {
                        decode();
                        console.error(err);
                        return;
                    }
                    decode();
                    console.info('\tDecoded file');
                });
            });
        })
    } else {
        console.info(`${index}. Skip file: ${file}`);
        decode();
    }
}
const files = readDirRecursively(dlePath);
console.info(`Total files: ${files.length}`);
decode();

tested at 13.0 version. Still work))