Introduced in PHP 7: IntlChar class containing static methods for characters

Code
<?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}"
);
Result
^ "Ä"



^ "č"



^ "F"



^ true



^ false



^ "LATIN CAPITAL LETTER U WITH DIAERESIS"



^ false



^ true



^ false



^ false



^ "☃"
More Snippets
Used Versions
PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8