PHP号码添加错误

$score = $_GET['score'];
$ht = $ayarcek['total'];
$total = $ht+$score;
echo $total;

Result: 6.0E-8

I want to summarize the numbers 1.000000 + 0 or 1.000000 + 1.000000, but when I do the collection I get the above result. Where could I have done wrong?

I solved the problem. It will be helpful for callers

$score = $_GET['score'];
$ht = $ayarcek['total'];
$cek = $ht+$score;
$total = sprintf('%.8f', $cek);