mb_convert_case

Description
Syntax
Examples
Links

Description

The mb_convert_case of Multibyte String for PHP perform case folding on a string.

Syntax

mb_convert_case(
    string $string,
    int $mode,
    ?string $encoding = null
): string

Parameters

string

The string being converted.

mode

The mode of the conversion. It can be one of:

Constant	Description
MB_CASE_UPPER	UPPERCASE with full case-mapping (multiple characters)
MB_CASE_LOWER	lowercase with full case-mapping (multiple characters)
MB_CASE_TITLE	Titlecase with full case-mapping (multiple characters)
MB_CASE_FOLD	foldcase (caseless) with full case-mapping (multiple characters)
MB_CASE_UPPER_SIMPLE	UPPERCASE with simple case-mapping (single characters)
MB_CASE_LOWER_SIMPLE	lowercase with simple case-mapping (single characters)
MB_CASE_TITLE_SIMPLE	Titlecase with simple case-mapping (single characters)
MB_CASE_FOLD_SIMPLE	foldcase (caseless) with simple case-mapping (single characters)

encoding

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

Return

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

Examples

1 · string mode · MB_CASE_UPPER

<?

$string = "CASE case Case ß";
$mode = MB_CASE_UPPER;

$return = mb_convert_case($string, $mode);

echo $return;

?>

CASE CASE CASE SS

2 · string mode · MB_CASE_LOWER

<?

$string = "CASE case Case ß";
$mode = MB_CASE_LOWER;

$return = mb_convert_case($string, $mode);

echo $return;

?>

case case case ß

3 · string mode · MB_CASE_TITLE

<?

$string = "CASE case Case ß";
$mode = MB_CASE_TITLE;

$return = mb_convert_case($string, $mode);

echo $return;

?>

Case Case Case Ss

4 · string mode · MB_CASE_FOLD

<?

$string = "CASE case Case ß";
$mode = MB_CASE_FOLD;

$return = mb_convert_case($string, $mode);

echo $return;

?>

case case case ss

5 · string mode · MB_CASE_UPPER_SIMPLE

<?

$string = "CASE case Case ß";
$mode = MB_CASE_UPPER_SIMPLE;

$return = mb_convert_case($string, $mode);

echo $return;

?>

CASE CASE CASE ß

6 · string mode · MB_CASE_LOWER_SIMPLE

<?

$string = "CASE case Case ß";
$mode = MB_CASE_LOWER_SIMPLE;

$return = mb_convert_case($string, $mode);

echo $return;

?>

case case case ß

7 · string mode · MB_CASE_TITLE_SIMPLE

<?

$string = "CASE case Case ß";
$mode = MB_CASE_TITLE_SIMPLE;

$return = mb_convert_case($string, $mode);

echo $return;

?>

Case Case Case ß

8 · string mode · MB_CASE_FOLD_SIMPLE

<?

$string = "CASE case Case ß";
$mode = MB_CASE_FOLD_SIMPLE;

$return = mb_convert_case($string, $mode);

echo $return;

?>

case case case ß

9 · encoding

<?

$string = "CASE case Case ß";
$mode = MB_CASE_UPPER;
$encoding = 'UTF-8';

$return = mb_convert_case($string, $mode, $encoding);

echo $return;

?>

CASE CASE CASE SS