(PHP 7)
Make Unicode character lowercase
public static mixed IntlChar::tolower ( mixed $codepoint )
The given character is mapped to its lowercase equivalent. If the character has no lowercase equivalent, the original character itself is returned.
Parameters:
codepoint
The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string