mb_strtolower
PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8
mb_strtolower - Make a string lowercase
mb_strtolower(
string$string,
[string|null$encoding = null] ): string
Returns string with all alphabetic characters converted to lowercase.
Parameters
- string
-
The string being lowercased.
- encoding
-
The encoding parameter is the character encoding. If it is omitted or null, the internal character encoding value will be used.
Return Values
string with all alphabetic characters converted to lowercase.
Notes
By contrast to strtolower, '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 (ä).
For more information about the Unicode properties, please see http://www.unicode.org/reports/tr21/.