mb_convert_case

(PHP 4 >= 4.3.0, PHP 5, PHP 7)
Perform case folding on a string
string mb_convert_case ( string $str, int $mode [, string $encoding = mb_internal_encoding() ] )

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

Parameters:
str

The string being converted.

mode

The mode of the conversion. It can be one of MB_CASE_UPPER, MB_CASE_LOWER, or MB_CASE_TITLE.

encoding

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

Returns:

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

Examples:
mb_convert_case() example
<?php
$str = "mary had a Little lamb and she loved it so";
$str = mb_convert_case($str, MB_CASE_UPPER, "UTF-8");
echo $str; // Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO
$str = mb_convert_case($str, MB_CASE_TITLE, "UTF-8");
echo $str; // Prints Mary Had A Little Lamb And She Loved It So
?>

mb_convert_case() example with non-Latin UTF-8 text
<?php
$str = "Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός";
$str = mb_convert_case($str, MB_CASE_UPPER, "UTF-8");
echo $str; // Prints ΤΆΧΙΣΤΗ ΑΛΏΠΗΞ ΒΑΦΉΣ ΨΗΜΈΝΗ ΓΗ, ΔΡΑΣΚΕΛΊΖΕΙ ΥΠΈΡ ΝΩΘΡΟΎ ΚΥΝΌΣ
$str = mb_convert_case($str, MB_CASE_TITLE, "UTF-8");
echo $str; // Prints Τάχιστη Αλώπηξ Βαφήσ Ψημένη Γη, Δρασκελίζει Υπέρ Νωθρού Κυνόσ
?>

See also:

mb_strtolower() -

mb_strtoupper() -

strtolower() -

strtoupper() -

ucfirst() -

ucwords() -

doc_php
2016-02-24 15:58:20
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