Make a string uppercase

# mb_strtoupper

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

mb_strtoupper — Make a string uppercase

### Beschreibung

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

Returns `string` with all alphabetic characters converted to uppercase.

### Parameter-Liste

`string`

  The string being uppercased.

`encoding`

  Der Parameter `encoding` legt die Zeichenkodierung fest. Wird er nicht übergeben, so wird die interne Zeichenkodierung genutzt.

### Rückgabewerte

`string` with all alphabetic characters converted to uppercase.

### Beispiele

Beispiel #1 mb_strtoupper() example

`<?php
$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
?>`

Beispiel #2 mb_strtoupper() example with non-Latin UTF-8 text

`<?php
$str = "Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός";
$str = mb_strtoupper($str, 'UTF-8');
echo $str; // Prints ΤΆΧΙΣΤΗ ΑΛΏΠΗΞ ΒΑΦΉΣ ΨΗΜΈΝΗ ΓΗ, ΔΡΑΣΚΕΛΊΖΕΙ ΥΠΈΡ ΝΩΘΡΟΎ ΚΥΝΌΣ
?>`

### Anmerkungen

By contrast to strtoupper(), 'alphabetic' is determined by the Unicode character properties. Thus the behaviour of this function is not affected by locale settings and it can convert any characters that have 'alphabetic' property, such as a-umlaut (ä).

For more information about the Unicode properties, please see » http://www.unicode.org/reports/tr21/.

### Siehe auch

- mb_strtolower() - Make a string lowercase
- mb_convert_case() - Perform case folding on a string
- strtoupper() - Wandelt alle Zeichen eines Strings in Großbuchstaben um

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