(PHP 4 >= 4.3.0, PHP 5)
mb_strtoupper — Make a string uppercase
$str
[, string $encoding = mb_internal_encoding()
] )
Returns str
with all alphabetic characters converted to uppercase.
str with all alphabetic characters converted to uppercase.
For more information about the Unicode properties, please see » http://www.unicode.org/unicode/reports/tr21/.
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 (?).
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 = "Τ?χιστη αλ?πηξ βαφ?? ψημ?νη γη, δρασκελ?ζει υπ?ρ νωθρο? κυν??";
$str = mb_strtoupper($str, 'UTF-8');
echo $str; // Prints Τ?ΧΙΣΤΗ ΑΛ?ΠΗΞ ΒΑΦ?Σ ΨΗΜ?ΝΗ ΓΗ, ΔΡΑΣΚΕΛ?ΖΕΙ ΥΠ?Ρ ΝΩΘΡΟ? ΚΥΝ?Σ
?>