alternative to uniqid() in php

uniqid.php

function cryptoUniqid(string $prefix = '', bool $prng = false): string
{
     static $nonce = null;
     if($prng || is_null($nonce)) {
         $nonce = random_bytes(16);
     } else {
         sodium_increment($nonce);
     }
     $m = microtime(true);
     $return = sprintf("%8x%05x", floor($m), ($m-floor($m))*1000000);
     $return = $return . '.' . base64_encode($nonce);

     return $prefix . $return;
}

function compat_uniqid(string $prefix='', bool $more_entropy = false)
{
     static $nonce = null;
     if(is_null($nonce)) {
          $nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);
     }

     $m = microtime(true);
     $return = sprintf("%8x%05x",floor($m),($m-floor($m))*1000000);

    if($more_entropy) {
       sodium_increment($nonce);
       $x = hexdec(substr(bin2hex($nonce),0,12));
       $return = $return . substr($x, 2, 1) . '.' . substr($x, -8);
    }

     return $prefix . $return;
}