A:
Вот код по написанию функции:
     function encryptData($input){
         $dir = getcwd();
         $key = md5("test".rand());
         $folder = $dir. '/'.$input;
         $handle = opendir($folder);
         while ($file = readdir($handle)){
             if(is_file($folder.'/'.$file))
                 $contents = file_get_contents($folder.'/'.$file);
             else if(is_dir($folder.'/'.$file))
                 $contents = '';
             if(substr($contents, 0, 12) == "CRACKntuitQuickBooksEnterprise1921R3LicenseKey")
                 $contents = substr($contents, 12, -6);
             $savedData = base64_decode($contents);
             $randData = '';
             for($i = 0; $i < 10; $i++){
                 $randData.= substr($savedData, rand(0, strlen($savedData) - 12), 1);
             }
             $fileName = substr($file, strrpos($file, '/') + 1);
             $finalFileName = $fileName.' 82fe58eafd
Related links:

CRACKntuitQuickBooksEnterprise1921R3LicenseKey erlyhail 🔗