php man page for mb_convert_case

MB_CONVERT_CASE(3)							 1							MB_CONVERT_CASE(3)

mb_convert_case - Perform case folding on a string

SYNOPSIS
       string mb_convert_case (string  $str, int  $mode, [string  $encoding = mb_internal_encoding()])

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

PARAMETERS
	      o $str
		- The string being converted.

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

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

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

UNICODE
	By  contrast to the standard case folding functions such as strtolower(3) and strtoupper(3), 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 as A-umlaut (A).

	For more information about the Unicode properties, please see http://www.unicode.org/unicode/reports/tr21/.

EXAMPLES
       Example #1

	      mb_convert_case(3) 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
	      ?>

       Example #2

	      mb_convert_case(3) example with non-Latin UTF-8 text

	      <?php
	      $str = "Txiotn a
nE Baos unuvn yn, dpaokeCei unp vw0po kuvs";
	      $str = mb_convert_case($_tr, MB_CASE_UP_ER, "UTF_8");   _ 		     _
	      echo $str; // Prints TXI>TH A/TTHH BAO> YHMNH | H, /PA>KE/EI YTTP NOOPO KYN>
	      $str = mb_convert_case($str, MB_CASE_TITLE, "U_F-8");
	      echo $str; // Prints Txiotn A
nE Baoo Ynuvn | n, /paokeCei Ynp Nw0po Kuvo
	      ?>

SEE ALSO
       mb_strtolower(3), mb_strtoupper(3), strtolower(3), strtoupper(3), ucfirst(3), ucwords(3).

PHP Documentation Group 													MB_CONVERT_CASE(3)