mb-convert-case

mb_convert_case

Perform case folding on a string

ENTITY

string

mb_convert_case

string

string

int

mode

string

null

encoding

ENTITY

Performs case folding on a string, converted in the way specified by mode.

ENTITY

string
The string being converted.

mode
The mode of the conversion. It can be one of MB_CASE_UPPER, MB_CASE_LOWER, MB_CASE_TITLE, MB_CASE_FOLD, MB_CASE_UPPER_SIMPLE, MB_CASE_LOWER_SIMPLE, MB_CASE_TITLE_SIMPLE, MB_CASE_FOLD_SIMPLE.

encoding
ENTITY

ENTITY

A case folded version of string converted in the way specified by mode.

ENTITY ENTITY

ENTITY

ENTITY

<?php
$str = "mary had a Little lamb and she loved it so";
$str = mb_convert_case($str, MB_CASE_UPPER, "UTF-8");
echo $str, PHP_EOL;
$str = mb_convert_case($str, MB_CASE_TITLE, "UTF-8");
echo $str, PHP_EOL;
?>

    

<?php
$str = "Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός";
$str = mb_convert_case($str, MB_CASE_UPPER, "UTF-8");
echo $str, PHP_EOL;
$str = mb_convert_case($str, MB_CASE_TITLE, "UTF-8");
echo $str, PHP_EOL;
?>

    

ENTITY

By contrast to the standard case folding functions such as strtolower and strtoupper, case folding is performed on the basis of 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 a-umlaut (ä).

For more information about the Unicode properties, please see ENTITY.

ENTITY

mb_strtolower, mb_strtoupper, strtolower, strtoupper, ucfirst, ucwords