PHPLockIt decoder

_php_lockit_decoder.php5

<?php

/*
PHPLockIt (new versions?) decoder

Usage:
`php _php_lockit_decoder.php5 <directory_in> <directory_out>`
*/

if ($argv[1] == 'DECODE') {
    $in = $argv[2];
    $output = $argv[3];

    $input = file_get_contents($in);

    $out = str_replace('__FILE__', "'".$in."'", $input);
    $out = str_replace('<?php', '', $out);
    $out = preg_replace('/\?\>.*/i', '', $out);
    $out = preg_replace('/echo\(.*return;/i', $step1, $out);
    $out = str_replace('eval', 'echo', $out);

    ob_start();
    eval($out);
    $step1 = ob_get_contents();
    ob_end_clean();
    $step1 = str_replace('eval', 'echo', $step1);
    $out = preg_replace('/echo\(.*return;/i', $step1, $out);


    ob_start();
    eval($out);
    $step2 = ob_get_contents();

    ob_end_clean();
    $step2 = str_replace('eval', 'echo', $step2);
    $out = preg_replace('/echo\(.*\);/i', $step2, $out);

    ob_start();
    eval($out);
    $final = ob_get_contents();
    ob_end_clean();

    $final = "<?php\n".$final;
    file_put_contents($output, $final);
} else {
    mkdir($argv[2]);
    $in = realpath($argv[1]);
    $out = realpath($argv[2]);

    $di = new RecursiveDirectoryIterator($in);
    foreach (new RecursiveIteratorIterator($di) as $filename => $file) {
        if (is_dir($filename)) continue;
        $nf = str_replace($in, $out, $filename);
        if (!is_dir(dirname($nf))) mkdir(dirname($nf), 0, true);
        if ($file->getExtension() == 'php' && $filename != __FILE__) {
            chdir(dirname($filename));
            echo exec(PHP_BINARY.' '.__FILE__.' DECODE "'.$filename.'" "'.$nf.'"');
        } else {
            if ($filename != __FILE__) copy($filename, $nf);
        }
        echo str_replace($in, '', $filename)." done\n";
    }
}

hello,
not understand the functioning ... could post a script running? emviar or in my email?