mb_strtoupper Make a string uppercase &reftitle.description; stringmb_strtoupper stringstr stringencodingmb_internal_encoding() Returns str with all alphabetic characters converted to uppercase. &reftitle.parameters; str The string being uppercased. encoding &mbstring.encoding.parameter; &reftitle.returnvalues; str with all alphabetic characters converted to uppercase. &reftitle.unicode; For more information about the Unicode properties, please see &url.unicode.reports;. 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). &reftitle.examples; <function>mb_strtoupper</function> example ]]> <function>mb_strtoupper</function> example with non-Latin UTF-8 text ]]> &reftitle.seealso; mb_strtolower mb_convert_case strtoupper