mb_strtolower

Syntax

string mb_strtolower( 
	string $string_to_convert,
	string $character_encoding = mb_internal_encoding()
);

PHP Manual

Description

This construct converts a string’s alphabetic characters to lowercase. It uses the current locale to determine the converter. Unlike the strtolower(), you can specify the character encoding, such as “UTF-8.”

Why? This function ensures characters such as umlaut-A (Ä) are properly converted.

Parameters

string_to_convert

This is the string to be converted into lowercase characters.

character_encoding

(optional) You can specify the character encoding to ensure that expanded character sets, such as umlaut-A (Ä) are properly converted.

Return Values

This function returns the converted string.