PHP "ctype_print" for unicode (UTF-8)...

ctype_print_unicode.php

<?php
define("CTYPE_PRINT_UNICODE_PATTERN", "~^[\pL\pN\s\"\~". preg_quote("!#$%&'()*+,-./:;<=>?@[\]^_`{|}´") ."]+$~u");

function ctype_print_unicode($input) {
    return preg_match(CTYPE_PRINT_UNICODE_PATTERN, $input);
}

print ctype_print_unicode("3 muços?"); // 1

Doesn't seem to work with

print ctype_print_unicode("¿3 muços?"); // 1

and characters like ≠ etc.