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@ 2013-05-07T10:03:04Z

<?php
setLocale(LC_ALL, 'ru-ru');
$string = 'Привет';
if (ctype_alnum($string)) {
    echo "This string totally works";
}
else {
    echo "And this one not so much";
}

Output
Performance
VLD
References
Branches

ctype_alnum: documentation ( source)
setlocale: documentation ( source)

preferences:dark modelive preview

29.99 ms | 402 KiB | 5 Q