IntlChar::totitle

IntlChar::tolower

Make Unicode character lowercase

Description

public static intstringnull IntlChar::tolower(intstring $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 int codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")

Return Values

Returns the Simple_Lowercase_Mapping of the code point, if any; otherwise the code point itself. Returns null on failure.

The return type is int unless the code point was passed as a UTF-8 string, in which case a string is returned. Returns null on failure.

Examples

Example #1 Testing different code points

<?php
var_dump(IntlChar::tolower("A"));
var_dump(IntlChar::tolower("a"));
var_dump(IntlChar::tolower("Φ"));
var_dump(IntlChar::tolower("φ"));
var_dump(IntlChar::tolower("1"));
var_dump(IntlChar::tolower(ord("A")));
var_dump(IntlChar::tolower(ord("a")));
?>

The above example will output:

string(1) "a"
string(1) "a"
string(2) "φ"
string(2) "φ"
string(1) "1"
int(97)
int(97)

See Also

IntlChar::totitle
IntlChar::toupper
mb_strtolower