Replaces 'ill-formed' byte sequences with '?'.
See: https://github.com/php/php-src/pull/1099
(PHP 7 >= 7.2.0)
mb_scrub — Description
$str
[, string $encoding
] ) : string
本函数还未编写文档，仅有参数列表。
str
encoding
Replaces 'ill-formed' byte sequences with '?'.
See: https://github.com/php/php-src/pull/1099