php man page for mb_strtolower

MB_STRTOLOWER(3)							 1							  MB_STRTOLOWER(3)

mb_strtolower - Make a string lowercase

SYNOPSIS
       string mb_strtolower (string  $str, [string  $encoding = mb_internal_encoding()])

DESCRIPTION
	Returns $str with all alphabetic characters converted to lowercase.

PARAMETERS
	      o $str
		- The string being lowercased.

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

RETURN VALUES
       $str with all alphabetic characters converted to lowercase.

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

	By  contrast  to strtolower(3), '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 (A).

EXAMPLES
       Example #1

	      mb_strtolower(3) example

	      <?php
	      $str = "Mary Had A Little Lamb and She LOVED It So";
	      $str = mb_strtolower($str);
	      echo $str; // Prints mary had a little lamb and she loved it so
	      ?>

       Example #2

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

	      <?php
	      $str = "Txiotn a
nE Baos unuvn yn, dpaokeCei unp vw0po kuvs";
	      $str = mb_strtolower($str, 'UTF-8');
	      echo $str; // Prints txiotn a
nE Baos unuvn yn, dpaokeCei unp vw0po kuvs
	      ?>

SEE ALSO
       mb_strtoupper(3), mb_convert_case(3), strtolower(3).

PHP Documentation Group 													  MB_STRTOLOWER(3)