Call to undefined function CodeIgniter\Config\putenv()

In production environment. I got this issue. The hosting provider had blocked the putenv() function for security reason.

Fatal error: Uncaught Error: Call to undefined function CodeIgniter\Config\putenv() in /www/wwwroot/idp/printerp_api/vendor/codeigniter4/framework/system/Config/DotEnv.php:92 Stack trace: #0 /www/wwwroot/idp/printerp_api/vendor/codeigniter4/framework/system/Config/DotEnv.php(77): CodeIgniter\Config\DotEnv->setVariable() #1 /www/wwwroot/idp/printerp_api/vendor/codeigniter4/framework/system/Config/DotEnv.php(43): CodeIgniter\Config\DotEnv->parse() #2 /www/wwwroot/idp/printerp_api/public/index.php(30): CodeIgniter\Config\DotEnv->load() #3 {main} thrown in /www/wwwroot/idp/printerp_api/vendor/codeigniter4/framework/system/Config/DotEnv.php on line 92

When i'm looking for the source of DotEnv.php, it didn't check the function exists or not.

PHP Code:

protected function setVariable(string $name, string $value = '')
{
    if (! getenv($name, true)) {
        putenv("{$name}={$value}"); // <== Here's the error occurred.
    }

    if (empty($_ENV[$name])) {
        $_ENV[$name] = $value;
    }

    if (empty($_SERVER[$name])) {
        $_SERVER[$name] = $value;
    }
} 


So i have to remark the 92nd line of codes.