<?php
dump(
IntlChar::toupper('ä'),
IntlChar::tolower('Č'),
IntlChar::totitle('f'),
IntlChar::isUUppercase('A'),
IntlChar::isULowercase('A'),
IntlChar::charName('Ü'),
IntlChar::isdigit(3),
IntlChar::isdigit('3'),
IntlChar::isdigit(0xFF),
IntlChar::isdigit(0b01),
"\u{2603}"
);
"Ä"
"č"
"F"
true
false
"LATIN CAPITAL LETTER U WITH DIAERESIS"
false
true
false
false
"☃"