(PHP 7)
IntlChar::tolower — Make Unicode character lowercase
The given character is mapped to its lowercase equivalent. If the character has no lowercase equivalent, the original character itself is returned.
Returns the Simple_Lowercase_Mapping of the code point, if any; otherwise the code point itself.
O tipo retornado será integer a não ser que o codepoint seja passado como uma string UTF-8, e nesse caso uma string será retornada.
Exemplo #1 Testando codepoints diferentes
<?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")));
?>
O exemplo acima irá imprimir:
string(1) "a" string(1) "a" string(2) "φ" string(2) "φ" string(1) "1" int(97) int(97)