mb_strtoupper()

mb_strtoupper() — Make a string uppercase.

Built-in function of PHP 8.5. The manual lists it as available in PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

What it does

Returns string with all alphabetic characters converted to uppercase.

Signature

mb_strtoupper(string $string, ?string $encoding = null): string

Parameters

ParameterTypeWhat it takes
$stringstringThe string being uppercased.
$encoding?stringThe encoding parameter is the character encoding. If it is omitted or null, the internal character encoding value will be used.

Return value

string with all alphabetic characters converted to uppercase.

Example

A runnable snippet:

$str = "Mary Had A Little Lamb and She LOVED It So"; $str = mb_strtoupper($str); echo $str; // Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO

Changelog

VersionChange
8.0.0Now throws a ValueError if encoding is an invalid encoding. Previously, an E_WARNING was emitted and false was returned.

See also

mb_strtolower(), mb_convert_case(), strtoupper()

All PHP 8.5 built-in functions

Reference card built from the PHP manual page mb_strtoupper() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.