mb_strtoupper

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

mb_strtoupper — Make a string uppercase

Description

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

Returns string with all alphabetic characters converted to uppercase.

Parameters

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

Return Values

string with all alphabetic characters converted to uppercase.

Examples

Example #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
?>

Example #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
?>

Notes

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/.

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User Contributed Notes 1 note

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serg_x ¶

6 years ago

Only first letter

function mb_ucfirst($string, $encoding = 'UTF-8'){
 $strlen = mb_strlen($string, $encoding);
 $firstChar = mb_substr($string, 0, 1, $encoding);
 $then = mb_substr($string, 1, $strlen - 1, $encoding);
 return mb_strtoupper($firstChar, $encoding) . $then;
}