Multibyte String Functions
PHP Manual

mb_scrub

Replace ill-formed byte sequences with the substitute character

Description

string mb_scrub(string $string, stringnull $encoding = null)

Perform a character set conversion from the specified encoding, or the default encoding if no encoding was specified, to the same encoding. This has the effect of replacing any invalid byte sequences with the substitute character.

Parameters

string

The input string.

encoding

The encoding used to interpret string. If it is omitted or null, the mbstring.internal_encoding setting will be used if set, otherwise the default_charset setting will be used.

Return Values

The string result with invalid byte sequences replaced.

Changelog

Version Description
8.0.0 encoding is nullable now.