(PHP 7)
IntlChar::toupper — Make Unicode character uppercase
The given character is mapped to its uppercase equivalent. If the character has no uppercase equivalent, the character itself is returned.
Returns the Simple_Uppercase_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::toupper("A"));
var_dump(IntlChar::toupper("a"));
var_dump(IntlChar::toupper("Φ"));
var_dump(IntlChar::toupper("φ"));
var_dump(IntlChar::toupper("1"));
var_dump(IntlChar::toupper(ord("A")));
var_dump(IntlChar::toupper(ord("a")));
?>
O exemplo acima irá imprimir:
string(1) "A" string(1) "A" string(2) "Φ" string(2) "Φ" string(1) "1" int(65) int(65)