PHP: mb_strlen

mb_strlen(string $string, ?string $encoding = null): int

Gets the length of a string.

string: The string being checked for length.
encoding: The encoding parameter is the character encoding. If it is omitted or null, the internal character encoding value will be used.

Returns the number of characters in string string having character encoding encoding. A multi-byte character is counted as 1.

If the encoding is unknown, an error of level E_WARNING is generated.

Version	Description
8.0.0	`encoding` is nullable now.

mb_strlen