php 数字格式化

比如说24转成twenty-four

需要打开 intl 扩展
使用方法：

<?php
$f = new NumberFormatter("en", NumberFormatter::SPELLOUT);
echo $f->format(123456);

?>

Produces the result:
one hundred twenty-three thousand four hundred fifty-six

php官方文档:https://www.php.net/manual/en/class.numberformatter.php