$d = 20;
echo $d ($d) ($d);
The result in PHP is 63
and in js the result is 62
Why is this?
when $d=21 21 21 21 =63
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
when $d=21 21 21 21 =63