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mb_strlen

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

mb_strlen — Get string length

Description

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

Gets the length of a string.

Parameters

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.

Return Values

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

Errors/Exceptions

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

Changelog

Version	Description
8.0.0	`encoding` is nullable now.

See Also

mb_internal_encoding() - Set/Get internal character encoding
grapheme_strlen() - Get string length in grapheme units
iconv_strlen() - Returns the character count of string
strlen() - Get string length

© 1997–2025 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.mb-strlen.php